Assume kepler's laws(conjectures) are valid prove that the gravitational law must be mu/r2. in m = 5.97510 24 kg and r+ = 6,371 km pb+ the launching velocity vo as a function of v0 for circular and paralstic orbits m r0 = r + + 500 km to v0 = r+ 1000 km for an elliptical orbit (e = 0.9), calculate e t h for r0 = r + + 500 km.

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.