A race car travels in a straight line from the starting line to the finish line in 12.0 seconds. The race car accelerated from a stopped position to 90 m/s b the time it reached the finish line. What was the acceleration of the race car?

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.