The earth moves around the sun in a nearly circular orbit of ra-dius 1.50 3 1011 m. during the three summer months (an elapsed time of 7.89 3 106 s), the earth moves one-fourth of the distance around the sun. (a) what is the average speed of the earth? (b) what is the magnitude of the average velocity of the earth during this period?

Distinguish between a transverse wave and a longitudinal wave.

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?

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?