Two buses P and Q are moving in opposite directions with velocities 15 m/s and 12 m/s respectively from the same place at the same time. Calculate the relative velocity
of P with respect to Q after 1 second
[Ans: 27 m/s]

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.

An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?

If element x has 99 protons how many electrons does it have