Apiano has a mass of 185 kg, and the coefficient of friction between it and the floor is 0.39. what is the maximum force of friction between the piano and the floor?

707 n
523 n
1813 n
1208 n

An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above