Essam is abseiling down a steep cliff. How much Gravitational potential energy does he loose for every metre he descends?His mass is 72kg and the gravitational firld strength is 10N/kg

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.