The rays traveled from AIR to an unknown substance. Calculate the n value and determine the unknown by following these steps: the ray is 73 and 77

Need in all of themmm only answer if you know pls

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 ability to make things happen is also called a. heat b. force c. matter d. energy