Avertical scale on a spring balance reads from 0 to 250 n . the scale has a length of 14.0 cm from the 0 to 250 n reading. a fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.85 hz .

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.