Spinning bottles Simple centrifuge // Homemade Science with Bruce Yeany Homemade Science with Bruce Yeany 2024-10-21 | Spinning bottles Simple centrifuge // Homemade Science with Bruce Yeany
NEW centripetal swinging bucket variation Homemade Science with Bruce Yeany 2024-10-09 | This is a combination of the classic centripetal demonstration of swinging a bucket filled with water combined with the upside down water glass experiment demonstrating atmospheric pressure. it is centripetal force that is causing the bucket to move in a curved path and inertia of the water being accelerated in that path that keeps it inside the bucket. When the ball is placed on top of the water filled bucket and turned upside down it is a combination of reduced pressure inside the bucket and atmospheric pressure pushing against the ball that is keeping the water from coming out.for more on this demonstration: youtube.com/watch?v=jQBNyd9nEmk
Upside down water glass trick.. IMPROVING A GREAT DEMONSTRATION Homemade Science with Bruce Yeany 2024-09-16 | Improved versions of a classic demonstration, the simple water glass turned upside down has a new twist when a balloon is used instead of a flat card.. The seal is improved enough that the jar of water can shaken and spun around without the water being spilled out. The weight of water inside the jar causes a slight pressure drop inside the container and the cohesive attraction between the water molecules hold them together when turned upside down, with a lower pressure inside the jar, atmospheric pressure pushes against the covering, which in turn seals the opening of the jar so the water stays inside. This behavior would be similar to the action of a suction cup.Special thanks to Homemade Science Junior (my granddaughter, Ella Yeany and friend.. watch at youtube.com/watch?v=QnKqM2uta_gMISTAKE: maximum water column should be 33.9 feet which converts to 10.3 meters.Absolute zero is usually referred to as a measurement of temperature, in this case the absolute pressure is zero meaning it is a vacuum. I briefly removed this video due to some questions about the explanation of the cohesiveness of the water being required for this to work and replaced it with a 2nd version that had that part of the explanation removed. After running some additional tests, I believe that it is correct as stated. However, it is my theory and I value any additional explanations proving me right or wrong. I have had quite a few additional questions regarding other variable in this experiment I will test additional ideas and present them in a future video.
Upside down water glass experiment IMPROVED. #science #air pressure Homemade Science with Bruce Yeany 2024-08-29 | The classic experiment of filling a jar up with water, putting a card over the mouth and turning it over. The weight of the water inside the glass reduces the pressure at the top of the container to less than atmospheric pressure of the air so it is the air outside the glass holding it in place. However, this air pressure is applied to all the surfaces of the container so it can be used to hold cards at other locations on the jar.
Upside down water glass, NEW VERSION of an old trick Homemade Science with Bruce Yeany 2024-08-20 | A new take on a classic demonstration, the simple water glass turned upside down has a new twist when a balloon is used instead of a flat card.. The seal is improved enough that the jar of water can shaken and spun around without the water being spilled out. The weight of water inside the jar causes a slight pressure drop inside when turned upside down, with a lower pressure inside the jar, atmospheric pressure pushes against the balloon, which in turn seals the opening of the jar so the water stays inside. This behavior would be similar to the action of a suction cup. A more detailed explanation and more examples will be shown in a follow up longer version posted to my channel.
Egg Cannon 400+ mph raw hardboiled frozen Comparison Homemade Science with Bruce Yeany 2024-07-07 | In previous videos, I had requests to test the difference between raw, hard boiled, and frozen eggs fired from a compressed air cannon and compare the damage of one versus the others. The canon set up that was used is able produce egg speeds in the excess of 400 mph. Eggs used have a mass of about 50 grams. Comparison was made against a flat surface and multiple surfaces spread apart.Eggs used have were donated due to being past their expiration date and no longer able to be sold for consumption
balancing nails, balancing pencils challenge #experiment #stem #science#physicsfun Homemade Science with Bruce Yeany 2024-06-21 | The nail Balance challenge has been around for quite a while and can be done with all different size nails from tiny pins to gigantic spikes, how about trying it with pencils. With a slight alteration, the same method can be used. For more information, please view my longer video.youtube.com/watch?v=CNa0QktJWlY
Physics of toys-Big Cartesian divers-part 2 // Homemade Science with Bruce Yeany Homemade Science with Bruce Yeany 2024-06-19 | Part 2. Cartesian divers can be a fun and easy science experiment, in this video let's go beyond the soda bottle divers and take a look at how to use large bottles and various toys to larger larger divers.For an explanation of the science behind how the divers work, see part one for an explanation. youtube.com/watch?v=ft9x_UEF_8othis video is a reposting of a previous video that included copyrighted music. It has been removed from this version
Physics of toys- Cartesian diver ideas-part 1 Homemade Science with Bruce Yeany 2024-06-12 | Part one. Cartesian Divers are a fun and simple experiment that is easy to do for any age. The basic experiment starts with using a soda bottle and divers made out of droppers, straws or other materials. This video take a look of suggestions to make the demonstration a bit more interesting. Spinning divers, remote control divers, how many divers can fit into a bottle at once. Continue on to part two takes a look at making larger divers.this video is a reposting of a previous video that included copyrighted music. It has been removed from this version
Centripetal swinging tray, improving an old demonstration Homemade Science with Bruce Yeany 2024-05-12 | The centripetal swinging bucket ad tray demonstrations has been around for centuries and is a classic physics demonstration that can be done at students of all ages. Changing fro using a bucket of water to using a tray with cups of water was a good improvement in the demonstration and in this video I attempt to some additional upgrades to the demonstration to make it a bit more interesting.this video is a reposting of a previous video that included copyrighted music. It has been removed from this versionHere is another YouTube video on the swinging tray that I posted previously youtu.be/vhNfIydKyRQ
Flying baby dolls.... the Coanda effect in action Homemade Science with Bruce Yeany 2024-04-26 | Flying balls were fun until I discovered there were all sorts of other objects that can be levitated in a stream of air that are much more interesting and challenging. To begin I followed a few simple rules: 1. objects cannot be supported by strings, 2. touch other surfaces, 3. objects must be able to be supported in airstream for at least 15 seconds. In this video, shop vacs or an air compressor provides the air stream to fly these babies. In previous videos I have flying carrots, cucumbers, spoons, footballs, pigs, to name a few. In a future I hope to post additional interesting household objects that I never expected would work.this video is a reposting of a previous video that included copyrighted music. It has been removed from this version
Fountain in a Bottle.. Simple Herons fountain #scienceexperiment #stem #experiment Homemade Science with Bruce Yeany 2024-04-25 | A simple version of Heron's fountain cane made with 2 bottles with caps and two soda straws. A full version of the explanation and build instructions can be found here. youtube.com/watch?v=NIf_dT-qUpQ
Balancing Nail or balancing Pencil Challenge Homemade Science with Bruce Yeany 2024-04-22 | The nail balance challenge has been around for years, I remember seeing it when I was in high school, but here is a new twist to it. The challenge is a simple demonstration of balancing a dozen nails by arranging them in a sequence that holds them together and then supporting the entire group above it's center of gravity. . So here is the challenge done with a variety of nails from sizes of 5 inches down to less than an inch. As they get smaller it does become quite a bit harder. What is new is that I've tried to do a variation of the trick by reproduce the challenge with pencils. It can be done, but a slight alteration is needed to the heads of the hanging pencils.this video is a reposting of a previous video that accidentally included copyrighted music. It has been removed from this version
Pringle Can singers.....Rijke tubes #science #physics #physicsfun Homemade Science with Bruce Yeany 2024-04-18 | 3 Pringles cans joined together make a singing tube, otherwise known as a Rijke tube. Adding a fourth tube that is able to slide and change the length of the chamber allows the pitch to be changed according to the length.ADDITIONAL EXAMPLES AND EXPLANATION ON RIJKE TUBES:youtube.com/watch?v=hMf8Rn4bdME
Toy Physics - Looping Pendulum /// Homemade Science with Bruce Yeany Homemade Science with Bruce Yeany 2024-04-15 | This is a simple demonstration that can be used to impress your friends using a variety of materials. It also can make a nice investigation for a science fair project or a classroom demonstration. Students can test variables and determine the conditions for the best results. The use of small lights and a camera can help capture the beauty in the movement of the small weight as it arrests the movement of the larger weight as it falls. Or, one other use can be for amusement purposes by turning the demonstration into a game. Any guesses who the wooden action figure is?this video is a reposting of a previous video that accidentally included copyrighted music. It has been removed from this version
Egg in the Bottle.. Several Variations to Try Homemade Science with Bruce Yeany 2024-04-05 | Probably the most widely posted kid's science experiment on YouTube but it's the same old example over and over. The egg in the bottle demonstration can be a great investigation of atmospheric pressure used as a STEM activity.Here are some additions that can be made to make it more interesting. Ideas include lengthening the mouth of the bottle, measuring the pressure change. In fact, this doesn't even have to be done with eggs, or how about doing the experiment without any change in temperature, no hot gases cooling or steam condensing to back to water.
Egg in the Bottle Mystery...no thermal change involved Homemade Science with Bruce Yeany 2024-04-03 | The Egg in the bottle demonstration using a thermal energy change has been a classic for generations. Here is another way of performing the same experiment without depending on a thermal change. I'd like to hear your thoughts in the comment section below on how this was accomplished. For a more complete explanation of this and other new variations of this classic egg experiment, please view the longer version of "Egg in the Bottle Variations" video.
Freefall, physics of elevators and other falling objects demonstrating weightlessness Homemade Science with Bruce Yeany 2024-03-28 | Weightlessness due to free-fall can be an engaging investigation for students and easily demonstrated using a variety of simple materials. Acceleration near earth's surface is 9.8 meters per second squared and is uniform to all object irregardless of their mass as long as air resistance isn't a factor.This video was posted previously with an accidental copyright music issue, it has been revised and reposted to remove copyrighted content
Chaotic magnet pendulum...entertaining and easy to build Homemade Science with Bruce Yeany 2024-03-23 | The erratic behavior of a bar magnetic pendulum can be captivating when it's movement become random due to the influence of attracting or repelling magnets placed near it pathway. Several variables can be explored to influence its behavior such as the number arrangement of the magnets, initial release position and mass of the bar. it's easy to capture the movement of the bar using phosphorescent paper and violet laser. This video was posted previously with an accidental copyright issue, it has been revised to remove the problem.
Balloon in the bottle #experiment #stem #science Homemade Science with Bruce Yeany 2024-03-20 | Eggs in a bottle has been one of the most widely performed science experiments of all time for children. Here is a series of demonstrations that takes the original experiment and suggests some new variables on this old trick.
Newtons cradle with water balloons versus frozen water balloonns Homemade Science with Bruce Yeany 2024-03-14 | Newton's cradle made with water balloons, or ice balloons, will it work? This device always been a fascinating toy whether it's in the science classroom or sitting on the "executive desk". Over the years I've made several different versions replacing the steels balls with other interesting objects, some of them worked better than others. In this investigation. I've made Newton's cradle using thought it would fun and challenging to try it using 5 water balloons, testing it and then freezing them and comparing the results. I was surprised by the resultthis video is reposted, replacing a previous version due to a copyright infringement
Floating carrot and cucumbers... the Coanda effect Homemade Science with Bruce Yeany 2024-03-09 | It's possible to Float a carrot or cucumber in a stream of air due to the result of the Coanda effect. a A stream of air flows over the top of the rounded surface and creates an area of low pressure, atmospheric pressure under the carrot supplies the force to lift it. When the rounded edge is removed the pieces no longer get enough lift to keep them aloft.Floating balls are boring, there are a lot more interesting objects that can float in air due the same effect. baby dolls, footballs, lightbulbs, mr. potato head even a hot dog that can be cooked while it is in midair. check out these other videosflying baby dolls. youtube.com/watch?v=yOXRfj9hqhIcooking a hot dog in mid air youtube.com/watch?v=annHcRS0oJIfloating objects youtube.com/watch?v=UuX8_2h4jJg
Rollback toy building instructions... Great STEM activity Homemade Science with Bruce Yeany 2024-03-04 | STEM building project challenge, design variations to the basic rollback design. How about walking feet , jumping grasshoppers, frogs, kangaroos moonwalking shoes and a rabbit racing against a tortoise. All these examples plus a few more can be added to the side of a rollback toy to make it a fun and challenging STEM activity for young students. Here are the building instructions to get started, but let students come up with their own design.
Rifling an Egg Cannon... attempts to spin a 300 mph egg projectile Homemade Science with Bruce Yeany 2024-02-15 | Shooting raw eggs at 300 mph using a PVC cannon is a unique challenge, In viewing video of the eggs in flight, we noticed they immediately, start to tumble, turn broadside and have a trajectory or path that appears very erratic, much like a thrown knuckleball. Our goal was to see if it's possible to improve its flight by either rifling the cannon barrel or by rifling the sabot that the egg is encased in. One other method was tested, adding stabilizer fins to the egg. VARLA Scooters:The scooter used in this video is a Varla Eagle one 2.0. We had a great time testing its features. You can find it and other Varla scooters at this website: varlascooter.com/BruceYeanyDiscount code: For $60 off of sale, use "BY60" for promo code Previous videos on shooting eggs at an average speed 300+ mph 1. launching raw eggs youtube.com/watch?v=33dnlFwjngk2. Egg target practice. youtube.com/watch?v=oczS6uEtTow3.Trying to catch a 300 mph egg. youtube.com/watch?v=HLiKZsXzrB44. Future goal, can we get the eggs up to 500 mph ?Eggs supplied were past their expiration date and no longer allowed to be sold as food.
Spinning tube trick- Cool variations Homemade Science with Bruce Yeany 2024-01-23 | NOTE: I've had a few people inform me that playing this video on their computers did not show the marks or words that appear spinning tube as intended. At the moment I don't know why. If anyone knows why this might occur I would love to hear why. Either way, I hope you enjoy this video. The spinning tube trick has been around for a while and I thought it was about time for an updated version of it. Still very simple but changes can be made replacing the X and O for more interesting designs. More possibilities, go smaller, go larger or change the length of the tube also makes for interesting investigations.
Colored light shadows color mixing...great student activity Homemade Science with Bruce Yeany 2023-11-26 | colored shadows has been a favorite student investigation and can be done with LED flashlights, or on a smaller scale little finger lights. It is a fascinating demonstration of showing how white light is a combination of different wavelengths for Color addition. The use of prism or "rainbow glasses" are able to separate white light in 7 different colors and once separated cannot be broken down a further. Color subtraction is also demonstrated using food coloring showing how colors block out all the other wavelengths except the one shown. This is a reposting of this video, it was inadvertently removed from this channel due to my inability to follow simple YouTube directions on deleting videos. Thank you to my several friendly subscribers that informed me it was missing.
Trying to Catch 300+ MPH Eggs Physics Impulse Challenge Homemade Science with Bruce Yeany 2023-11-11 | Thank you to everyone that made suggestions in the comment section!Catching eggs without them breaking either by hand or some other means has always been a great way of teaching the concept of Impulse. A concept I decided to explore at faster rates. I found getting raw eggs up to 300 mph was easy compared to the challenge of somehow trying to catch them safely without breaking. I've tried some of the methods that were suggested in previous videos along with some of my own ideas. It is a lot tougher than it sounds, eggs at 300 + mph have about twice the amount of kinetic energy as someone swinging a sledgehammer, but unlike a sledgehammer, the egg's shell breaks with only a small amount of force is applied to it. NOTE: these are old eggs that are past their expiration date and can no longer be sold for human consumption. I got them from a local supplier that cannot sell them since It is dangerous to eat old eggs. These were headed to the dumpster if I didn't use them. For more two previous videos on shooting eggs"launching raw eggs". goes through various methods that I tried toget eggs going as fast as possible, my goal was 200 mph, I achieved 329 mph. youtube.com/watch?v=33dnlFwjngk"Egg target practice". what fun would it be if after figuring out how to get eggs up to 300 mph, if I didn't have some target practice. It is impressive just how much kinetic energy an egg has at that speed and how much damage it can do when it hits a target.youtube.com/watch?v=oczS6uEtTow
Egg Target Practice at 300 mph (483 km/h) Homemade Science with Bruce Yeany 2023-09-25 | After figuring out how to launch raw eggs to over 300 mph( 483km/h), I thought I'd have a little fun with the cannon and see what can withstand getting hit by a flying egg. It's surprising just how much energy they have at high speeds and the amount of damage they can do. At 300+ MPH even something as fragile as an egg could be dangerous and requires some respect for the amount of energy it has. Video shows good example of impulsePVC AIr cannon dangers future episode: I am looking for information on safety problems that anyone has had with PVC cannons. If you have had a cannon fail for any reasons please forward the details to me at Bgoknee@comcast.net this video is a follow up to Launching Raw eggs youtube.com/watch?v=33dnlFwjngkA future video will feature attempts to try and stop a 300 mph egg safely without it breakingFor anyone wondering about wasting food, the eggs were supplied and were past their sellable expiration date.Okay so I've already received offers for it, selling the damaged computer listing was supposed to be a joke, not only is the screen destroyed but it also has raw egg and water inside the body. I don't think any amount of repairs will bring it back to life.One last note: the high pitched sound that is heard throughout the video is due to seasonal male cicadas making a loud buzzing noise to attract a mate. A problem when trying to shoot video outdoors during the summer
Launching raw eggs /// How fast can they go? Homemade Science with Bruce Yeany 2023-08-27 | As part of my science teaching lessons on impulse, we've used eggs in various demonstrations. As an extension, I thought I would try various methods to see how fast I could get one going as a projectile. Not wanting to waste good food, I checked with a some stores and found a few that would supply me with eggs past their expiration date. In this video, the challenge was to see if I can match or exceed the speed of a well driven golf ball (about 200 miles per hour) and then see how far an egg will "fly" in comparison to the distance a long drive for a golf ball will travel (over 300 yards). Interestingly, no golf courses were willing to let me test fire my egg cannon on their fairways. I used small eggs that were approximately the same mass as golf balls, about 45 – 50 grams. The difference of course is that they are not symmetrical, do not have dimples and do not spin to help create liftWhile I was pleased that I was able to reach speeds of 340 mph, I was very surprised that the addition of the vacuum cannon to the air cannon only increased the overall speed by about 8%. This is much less of an increase than what was demonstrated when the projectiles were ping pong balls (which can be accelerated to over mach 1 with the same type of set up). A quick guess is that air resistance is not as big a factor since an egg has considerably more mass than a PP ball. With better equipment I believe that the eggs could have reached much higher speeds Special thanks to my helpers Dean and Sidney during the trials for the distance shots, it was a hot day and they were very patient.Physics question, what would be the theoretical maximum speed that a raw egg could achieve before the force of air resistance would shatter the shell? After viewing several shots in slow motion it appears that an egg will orient itself with broad side to the incoming air as shown at 1:13. Safety note on PVC cannons1: Due to the inherit danger of these types on cannons, I DO NOT use them or recommend their use in the classroom.Safety Note on PVC air cannons2:While schedule 40 PVC is rated at 220 PSI it is not rated for compressed air storage and sudden shifts of high pressure levels have been known to break these types of cannons apart. The chamber was pressured to 100 PSI, the maximum for my air compressor. Safety Notice 3: As stated above, PVC pipe is not rated for air and may not handle sudden changes in pressure. Speaking from personal experience, PVC cannons that use combustion as a propellant have the combination of high pressure plus excessive temperatures for the short periods of time which may add undue stress on the PVC tubing and joints causing them to fail. Please do not attempt this demonstration without knowledgeable adult supervision.
Centripetal force toys and games Homemade Science with Bruce Yeany 2023-05-23 | This is a compilation of centripetal and centrifugal force examples that have always been fun investigations for students in my classroom during our study of force and motion. Most of them are very easy to try for yourselves. Several of them have been shown in more depth in previous videos and are listed below. centripetal toys youtube.com/watch?v=GDN38voYPNc&feature=youtu.becentripetal swinging tray youtube.com/watch?v=7iNnajnyZfwspinning car tireyoutube.com/watch?v=mZmesC2j0L4lever toy updatedyoutube.com/watch?v=KUmtltbxpHYspinning bottlesyoutube.com/watch?v=1feybxNChU0spin artyoutube.com/watch?v=zatd0H20WFc
Moment of Inertia..Student motion investigation Homemade Science with Bruce Yeany 2023-03-24 | Here's is a a simple student investigation of moment of inertia for younger students. It is a challenge to determine how the position of mass affects angular acceleration of a cylinder rolling down a ramp. The challenge is to try and design a "wheel and axle" that will have the quickest movement down the table or the slowest. Materials needed are cardboard, engines, pencils tape or glue. To speed things along, I sometimes used a circle cutter to precut some wheels out of cardboard.There are a variety of manufacturers for good circle cutters and can be found online by doing a search for circle cutters. I am not receiving any paid promotion for the particular brand that I show in this video, it is a NT Cutter Heavy-Duty Circle Cutter
String Shooter Pipes....air driven Homemade Science with Bruce Yeany 2023-02-13 | String shooters have become a popular toy over the past few years. Since posting a video showing two spinning wheels spitting out a 16 foot loop of string, quite a bit of insights into the science behind it's behavior has been posted through a number of sources including published papers and a number of videos posted on YouTube. In this video, I'm demonstrating a far simpler method of launching a loop of string using a high speed air stream. Drinking straws launch strings using lung power for small versions while vacuum exhaust launches larger versions. While it's path may match that of the wheel propelled shooter, I think the explanation of it's launch may have additional complexity, or at least I don't have an understanding of them as yet. Questions such as what would be the best ratio of air speed to string speed? what happens to the string as the two speeds become closer? At what point does the loop break down into a chaos on the outgoing pathway? My Lab helper for today is named is Casey, she is 6 months old and constantly inquisitive additional videos with explanationsInternational physicists tournament youtube.com/watch?v=vrSiLFosLpc&t=1128syoutube.com/watch?v=A7dYEtz2u68&t=124sSteve Mouldyoutube.com/watch?v=SOEXXlXi4RA&t=601sAction labyoutube.com/watch?v=2ANnMsyunkkPublished articles on string behavioremergent-scientist.edp-open.org/articles/emsci/full_html/2020/01/emsci190003/emsci190003.htmlsexyloops.co.uk/theboard/viewtopic.php?t=3010Original YouTube posting that started the string shooter crazeyoutube.com/watch?v=rffAjZPmkuUcommercially available string shooter Zipstringzipstring.com3-D print version available on thing versethingiverse.com/thing:3305881
Centrifugal spinning toys //. Homemade science Homemade Science with Bruce Yeany 2022-12-30 | Centrifugal spinning toys are very easy to make and have been a popular item in science classrooms. more information on how to make the little people for the vertical spinning toy can be found on the Physics lever toy video found at:youtu.be/NYAtYEEnuE8
Centripetal swing tray video bloopers Homemade Science with Bruce Yeany 2022-08-13 | While making a video on the classic centripetal swinging tray demonstration, some of the variations shown were being tested for the first time as I was making the video. The result being that not everything went as smoothly as possible. However, overall I was impressed with the changes and look forward to taking them a step further in the future. The original video can be seen here: youtu.be/7iNnajnyZfw
Inertia Shuffleboard..... Homemade Science with Bruce Yeany Homemade Science with Bruce Yeany 2022-06-21 | Here is a table top shuffleboard game that we've set up when demonstrating Newton's laws of motion, students found it to be a lot of fun. There are several variations that be be made, The game can be set up simpler without the rubber band shooter block, just pushing the blocks by hand but everyone seemed to prefer this method.
Graduation Commencement Speech... What could go wrong? Homemade Science with Bruce Yeany 2022-06-09 | The commencement speech I gave for my last group of students as a teacher before I retired. I did have the opportunity to visit back with my old position this year as a returned to fill in my old position due to the previous teacher leaving unexpectedly. The speech was practiced several times, but results did not go quite a smoothly as I had planned. However it is one that I think will not be one that is soon forgotten. My best wishes to the class of 2022
Newtons laws of motion demonstrated with wooden blocks Homemade Science with Bruce Yeany 2022-06-06 | I've used a set of wooden blocks as a means of introducing or reviewing basic concepts about Newton's laws of motion. The construction and use are very simple but illustrate very clearly force, mass and acceleration are all related in the the motion of objects
Musical Bottles Sound Science Homemade Science with Bruce Yeany 2022-05-29 | There are a variety of ways for making sounds from ordinary glass and plastic bottles and has been a favorite of students for years, here are a few additional activities to investigate about the sounds made by either striking the bottle to make it ring or blowing across the mouth (Helmhotlz resonator) to make sound by vibrating the air inside the bottle, either way it is an investigation that anyone can make. Additional ideas are included to take bottle sounds to the next level
Atmospheric pressure powered car // Homemade Science with Bruce Yeany Homemade Science with Bruce Yeany 2022-05-08 | Here is a small car that is uses the atmospheric pressure as a medium for storing potential energy as a power source. It follows the initial project of using a larger water squirter toy on a car of similar design. In this case, a small syringe is stoppered at the tip and when the plunger is pulled out, the differential between the inside of the syringe and the atmosphere outside of it can be used to supply the turning force on the rear axle. A string wrapped around the rear axle supplies the torque giving car distance close to 100 feet. A second method of using a pulley system to increase the power supply range but reducing the torque is introduced but appears to need some additional modifications ( still a work in progress).
Egg Drop Project Highlights, Homemade Science with Bruce Yeany 2022-04-30 | Safely stopping an unpackaged egg as it falls is the challenge. This activity has been around since I started teaching in the 70's and has always been a student favorite. However, after trying the original concept of packaging around the egg for several years , I switched from the egg packaging to the idea of egg catching. We've found this to be much more challenging for designs, and better suited to areas while limits to height for the falling distance are a factor, our building limits us to about 5 meters , Difficulty to the challenge can be adjusting the type and amounts of supplies that may be used. I should have mentioned I have done this with adults in a grad class that I taught at a nearby college. In that case the materials were 25 sheet of copy paper and tape, it was a overwhelmingly the favorite activity that I assigned. I do believe that activities such as this need to be tied to a lessons rather than given as a random assignment. The concepts that I use in in conjunction with this activity include:Newton's law's of motion , Impulse, Galileo and accelerating bodies, freefall, terminal velocity.No one asked but the eggs were donated as they were past their expiration date for sale
Atmosphere powered cart. // Homemade Science with Bruce Yeany Homemade Science with Bruce Yeany 2022-03-29 | A large syringe type water toy as a basis for storing potential energy was successfully used to drive a small cart across the floor for about 200 feet. By pulling the plunger out on the toy syringe, a vacuum is formed in the empty chamber and atmospheric pressure trying to equalize the pressure inside the tube drives the plunger back in again with a force of approximately 11.5 pounds or 51 newtons. As the first prototype to test the concept, the cart was made rather large and heavier than needed but still managed to combine drive and coast for the length of our school hallways and gym floor. Minor efforts were tested at changing the mechanical advantage of the drive but still needs to be refined further for improving distance or speed of the cart. The idea for this was based on:Tom Stanton atmosphere powered caryoutube.com/watch?v=KWAvj8ATXmE&t=1100s
Tire spinning paint Homemade Science with Bruce Yeany 2022-03-20 | This was a classroom investigation taking a look at how mud may fly off a spinning tire. The tire is spun using a electric drill and the mud is replaced with colored tempura paint. The original file of video were lost during some computer trouble but were recently found. I used this in my classroom once or twice but discarded it for demonstrations with clearer results.
Physics lever toy, instructions for an easy build. //. Homemade Science with Bruce Yeany Homemade Science with Bruce Yeany 2022-03-16 | The lever toy has be around for decades if not centuries, they are easy to build, fun to play with, and can be a used in lessons about simple machines. However, the traditional look of the acrobat needed updating, so in this video I am offing some tips on how to build ones of these whether it's an animated figure, historical figure, someone that you know or even yourself.
Lever toy updated physics toy // Homemade Science with Bruce Yeany Homemade Science with Bruce Yeany 2022-03-06 | The lever toy has be around for decades if not centuries, they are easy to build, fun to play with, and can be a used in lessons about simple machines. However, the traditional look of the acrobat needed updating, so in this video I am offing a few suggestions on giving the toy a more modern look. I'm hoping to see reviewers take up the challenge and offer their own ideas of who should appear as the next gymnast on the toy.
Cool rollback toy variations... Great STEM activity Homemade Science with Bruce Yeany 2022-01-02 | What can be added to a rollback toy to make it more interesting? How about walking feet , jumping grasshoppers, frogs, kangaroos moonwalking shoes and a rabbit racing against a tortoise. All these examples plus a few more can be added to the side of a rollback toy to make it a fun and challenging STEM activity for young students.
Homemade Holiday Music // Homemade Science with Bruce Yeany Homemade Science with Bruce Yeany 2021-12-20 | I use some homemade "musical" instruments to play a couple of songs for the holiday season. 1. water bottles have a tire valve installed in the cap and are then pressurized to at amounts that allow it to correspond to musical notes2. Savart's wheel: 8 wheels that a number of ridges on it's edge that when spinning at the right RPM will play a musical scale when a piece of paper is held to them3. Wooden xylophone, 8 pieces of wood cut to length that are supported at the nodes correspond to a musical scale matching the first two instruments4. A bottle slide flute, changing the length of the bottle insert allows the pitch of the note to vary depending on it's length of inside the bottleI will bet presenting the the pressurized bottle xylophone and the slide bottle flute in a future video along with some additional information on making music with glass or plastic bottles
Savarts wheel, Good science, bad music Homemade Science with Bruce Yeany 2021-11-16 | Savart's wheel is a circular disc with symmetrical teeth on it's edge and was developed in the 1600's as a method of demonstrating the relationship of frequency and pitch. As the wheel rotates, a piece of card stock is held against the teeth to make a steady sound that changes in pitch according to the number of teeth on the wheel or the speed that it rotates. Savart's wheel musicyoutube.com/results?search_query=savarts+wheelMusical roadsHungary has a road that plays musicyoutube.com/watch?v=XukLEaMbm9kMusical road in Albuquerqueyoutube.com/watch?v=ZxdC9qkrJocMusical road Lancaster Calyoutube.com/watch?v=KHnCiMJLtJwThe Japanese music road in Fujiyoutube.com/watch?v=WFafW3J-kP0&t=118s
Chaotic pendulums entertaining behavior, // Homemade Science with Bruce Yeany Homemade Science with Bruce Yeany 2021-09-24 | Chaotic pendulums have always been a fun classroom or home science demonstration. Here is an easy to build set of arms that can t be changed around to a few different chaotic pendulum variations. While these devices are usually made out of aluminum or plastics, this design is made out of standard stock 1/4 inch thick oak wood, a few commonly available skateboard bearings and a few nuts, bolts and washers.
Simple siren disc build instructions // Homemade Science with Bruce Yeany Homemade Science with Bruce Yeany 2021-09-16 | Here are ideas on how to build and demonstrate a simplified version of the Seebeck siren disc that has been a classic physics demonstration showing the relationship between frequency and pitch since the 1840's. Using simple materials, toy such as foam plates, cardboard or old CDs, to make the siren disc and toy DC motors to drive it the video shows the steps needed to complete a simple investigation.CDs are meant to spin at 500 RPMs. and tend to explode around 30,000 RPMs, I measured the the highest speed reached by a CD on this device, around 3,200 RPMs. However, the holes may weaken the discs I also found a few of them separated into two thinner discs. While I will still use the CD. discs, any future pieces will most likely be made out of the foam plate material.
Simple siren disc demonstration //. Homemade Science with Bruce Yeany Homemade Science with Bruce Yeany 2021-09-06 | Here is a simplified version of the Seebeck siren disc that has been a classic physics demonstration showing the relationship between frequency and pitch. The siren disc has a long history is sound studies and was first introduced by Thomas Seebeck in 1841 as a method of generating pure tones. It continues to be a staple of high school and college physics classes as it visually demonstrates the production of sound by interrupting the air flow through a series of holes located on a spinning disc.3 additional notes. gained from the commentsThomas Seebeck died in 1831. August Seebeck made the tone disk.Safety first, I should be wearing safety glasses, especially being near the spinning surface with my faceCDs are meant to spin at 500 RPMs. and tend to explode around 30,000 RPMs, I measured the the highest speed reached by a CD on this device, around 3,200 RPMs. However, the holes and slots can weaken the plastic substantially and the slotted one broke when the balloon pump nozzle touched it. While I will still use the CD. discs already made, any future pieces will most likely be made out of the foam plate material.
Curve ball Flingers Easy to Build and Throw // Homemade Science with Bruce Yeany Homemade Science with Bruce Yeany 2021-08-26 | Easy designs for demonstrating the principles of how a curve ball bends due to the Magnus effect. You don't need to be good at throwing a ball, this piece will assist you and I guarantee you'll be seeing curveballs after just a couple throws. This video is a follow up a previous that went into more detail on the principles of the Magnus Effect.curve ball flingers part one can be seen here. youtu.be/KoffDYxXap0
