Blog Archives

Curvature

Posted on March 5, 2016 by harveyjohnson — 1 Comment

There is a natural way to compute the curvature for a curve whose position is given as a function of time, . The following is the vector proof which shows how the velocity and acceleration vectors can be used to compute the curvature at any time. Is there…

The number of photons ejected from the sun in a second

Posted on March 26, 2013 by harveyjohnson — 4 Comments

How many photons does the sun emit in a second? The following worksheet was used in companion with this post for chemistry students. Our chemistry class used the work of Brian Cox and (originally) John Herschel to determine the number…

A very fractal christmas

Posted on December 18, 2012 by harveyjohnson — Leave a comment

Multivariable Calculus Class Does Christmas (fractals) Of the christmas trees that students created, you chose “A.” This was created by contributor, Josh Choi. Excellent work everyone and thank you for your votes!

Tagged with: Multivariable calculus
Posted in Multivariable Calculus

The Calculus of Friendship

Posted on November 8, 2011 by harveyjohnson — 3 Comments

Taking it to the limit If you like great math riddles, you will enjoy this book by Steven Strogatz about his 30 year correspondence with his high school math teacher. There are excellent discussions about Feynman’s differentiation under the integral,…