G = 6.67 E−11 N*m2/kg2, mass of the Earth is 5.98 E 24 kg, mass of the ISS is 4.20 E 5 kg, average Earth-ISS distance is 6.78 E 6 m. If the gravitational force between the Earth and the international Space Station is 3.64 E 6 N, what is the average speed of the ISS as it orbits the Earth? (1 point) 5200 m/s

6500 m/s

7700 m/s

9100 m/s

A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.