A quick introduction to torsion (how is this differ from curvature?) Calculus 3 

7:19 I know it doesn't matter here because NxdT/ds is zero, but for good form, shouldn't that be dT/dsxN?

Just remember roller coaster!

Can I just say one thing? These calc 3 videos are awe-inspiring. Your 3d skills are better than my imagination, so much so that I am motivated to learn how to draw volumes and curves in such an aesthetic way. The spherical coordinate vs other coordinates video and the thing you said about the laser was so eye-opening to me that I'm going to remember it till my last day, and from now on I'm also going to think about you whenever I am in a rollercoaster. I just watch your videos for fun for the last 4 years and your excitement often helps me cheer up when I'm having a blue day. You are the best educator I've ever seen and many people like me haven't even had any course on the stuff you teach, but still they watch you for fun. I am greatful to the universe that you exist. I hope I meet you some day. Love from Greece!

Hey, the video stops abruptly for me, and I see comments with time stamps longer than the video. Anyone else have this problem?

In Italy I’ve studied this at the second year of engineering at the University (Exam of Rational Mecanics)

I had a whole course in vector calculus in grad school. You ain't seen nothing yet :-)

Hello bprp, you got any calculus book recommendation for someone who is going to college next year?

Oh great that is what i needed Fleming right hand rule in math what is next?

Not sure how I got here but I thoroughly enjoyed this

Is this similar to testicular torsion?