HW: Set #4, RPM and Chandelier

Perhaps this is a cultural thing. Vinyl record listeners probably knew "RPM" better.
RPM = revolutions per minute
If you express the period T, in minutes, then that is "minutes per revolution," i.e. the inverse of RPM.
Hope that helps.

It appears that the "Chandelier" extra credit problem causes lots of grief, due to the computer formatting problem. I tried to give all due credits back when students email me explaining [calmly, in an ideal world] how dumb the computer program was not to recognize their correct answer. Fair enough. Did I miss giving you the credit that you deserve? Did you have a similar problem that you did not email me about? In either case, let me know by email, right away!

You can ask for your due credit for any problem, when you are sure that your answer was correct. For instance, if you can verify that your answer is just another form of expressing the answer that the computer gives you, then you know that your answer must be correct. Also, please note that parenthesis and other formatting matters get in the way of computer understanding your answer.

When you do send me an email to get your due credit back, you should say that explicitly. That is, don't just say what headaches that you are getting from the MP program, but do say that you want your credit back if that is what you want.