It is a well-known fact that water has a higher specific heat than iron. now, consider equal masses of water and iron that are initially in thermal equilibrium. the same amount of heat, 30 calories, is added to each one. which statement is true?

a. they remain in thermal equilibrium
b. they are no longer in thermal equilibrium; the iron is warmer
c. they are no longer in thermal equilibrium; the water is warmer
d. it is impossible to say without knowing the exact mass involved
e. it is impossible to say without knowing the exact specific heats

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.