B) A satellite with mass m orbits the Earth at a radius r. A second satellite also with mass m orbits the Earth at twice the radius.
How does the force of Earth's gravity acting on the two satellites
compare? PLEASE HURRY

First answer marked as brainiest which is the correct equation describing the first law of thermodynamics? a) when the internal energy of a system changes, it equals the amount of heat added plus the work done. b) when work is done by the piston, it is equal to the heat added plus the change in internal energy of the system. c) when heat is added to the system, it is equal to the amount of work done by the piston plus the change in internal energy of the system.