Please helppp A 4 kg object is moving 2 m/s to the right. A 6 N force
pushes to the left for 3 seconds.
A. Calculate Pnetforce
B. Calculate the impulse.
C. What is Ap for this object?
D. What is its final momentum (p.)?

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.