How can I solve these to get my answer?

Apotter's wheel moves uniformly from rest to an angular speed of 0.20 rev/s in 32.0 s. (a) find its angular acceleration in radians per second per second. rad/s2 (b) would doubling the angular acceleration during the given period have doubled final angular speed?

The solid that is formed and usually sinks to the bottom of a solution is the

How does the entropy of steam compare to the entropy of ice?