Aray of light is traveling from water into a diamond. upon hitting the diamond, a light ray bends toward the normal. with this information, what can you say about the speed of light as it passes from water into a diamond?
a.) the speed increases
b.) the speed decreases
c.) the speed drops to zero
d.) the speed does not change

the correct answer is b, the speed decreases

To place a communications satellite into a geosynchronous orbit at an altitude of 22,240 mi above the surface of the earth, the satellite first is released from a space shuttle , which is in a circular orbit at an altitude of 185 mi, and then is propelled by an upper-stage booster to its final altitude. as the satellite passes through a, the booster's motor is fired to insert the satellite into an elliptic transfer orbit. the booster is again fired at b to insert the satellite into a geosynchronous orbit. knowing that the second firing increases the speed of the satellite by 4810ft/s, determine (a.) the speed of the satellite as it approaches b on the elliptic transfer orbit, (b.) the increase in speed resulting from the first firing at a.