Uploaded October 2017 | Updated September 2026, 1 week ago
demonstrations.wolfram.com/TorqueAndSpeedCharacteristicsOfSeparatelyPoweredDCMotors
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
This Demonstration shows a series of rotation rates versus electromagnetic torque curves for separately powered DC motors. Detailed formulas for the relevant variables are also displayed. You can vary the parameters to see how they interact.
Contributed by: Anping Zeng
Audio created with WolframTones:
tones.wolfram.com
demonstrations.wolfram.com/TorqueAndSpeedCharacteristicsOfSeparatelyPoweredDCMotors
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
This Demonstration shows a series of rotation rates versus electromagnetic torque curves for separately powered DC motors. Detailed formulas for the relevant variables are also displayed. You can vary the parameters to see how they interact.
Contributed by: Anping Zeng
Audio created with WolframTones:
tones.wolfram.com
![Dissection of a Square to a Parallelogram with the Same Base
http://demonstrations.wolfram.com/DissectionOfASquareToAParallelogramWithTheSameBase
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
Two polygons of the same area are said to be equivalent. In [1], Tarski defines the degree of equivalence of two equivalent polygons V and W as the smallest natural number n for which there exists a dissection of V to W using n pieces. The function is d...
Contributed by: Izidor Hafner
Audio created with WolframTones:
http://tones.wolfram.com Dissection of a Square to a Parallelogram with the Same Base](https://i.ytimg.com/vi/OoM3PXXrcJM/mqdefault.jpg)


![Roulette (Epitrochogon) of a Regular Polygon Rolling around Another Regular Polygon
http://demonstrations.wolfram.com/RouletteEpitrochogonOfARegularPolygonRollingAroundAnotherReg
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
An epitrochogon is the trace (roulette) of a point attached to a polygon rolling without slipping around the outside of another polygon [1]. The epitrochogon can be curtate if the tracing point is inside the rolling polygon, or prolate if it is outside....
Contributed by: Erik Mahieu
Audio created with WolframTones:
http://tones.wolfram.com Roulette (Epitrochogon) of a Regular Polygon Rolling around Another Regular Polygon](https://i.ytimg.com/vi/PRnFjPaAGYI/mqdefault.jpg)

![First[{}]
http://demonstrations.wolfram.com/ThePlemeljConstructionOfATriangle10
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
First[{}]
First[{}]
Audio created with WolframTones:
http://tones.wolfram.com First[{}]](https://i.ytimg.com/vi/Q92cVJQ5UAc/mqdefault.jpg)


![Linear Regression with Gradient Descent
http://demonstrations.wolfram.com/LinearRegressionWithGradientDescent
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
This Demonstration shows how linear regression can determine the best fit to a collection of points by iteratively applying gradient descent. Linear regression works by minimizing the error function: ( 1 ) / ( n ) UnderoverscriptBox[?, RowBox[{i, =, 1}]...
Contributed by: Jonathan Kogan
Audio created with WolframTones:
http://tones.wolfram.com Linear Regression with Gradient Descent](https://i.ytimg.com/vi/QmlOzt7GleI/mqdefault.jpg)

