A ball is rolling down a track as shown. How fast must it be going at A in order to just make it to the top of B? The ball is at Peak A which is 5.0 m tall and wants to go to Peak B, which is 10.0m tall

Which of the following changes to a pipe would increase the conductance by a factor of 12? 1.quadrupling the length and tripling the radius.2.reducing the length by a factor of and doubling the radius.3.tripling the length and reducing the radius by a factor of .4.reducing the length but a factor of and doubling the radius.

The a metal retainer that keeps the rolling elements evenly spaced. n a. seal n b. separator n c. bearing n d outer race

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)