Asample of iron has a volume of 10.0 ml. the density of iron is 7.87 g/ml. which is the correct expression to calculate the mass of the sample using dimensional analysis? a. 10.0 ml x (7.87 g / 1 ml) b. 10.0 ml x (1 g / 7.87 ml) c. 10.0 ml x (1 ml / 7.87 g) d. 10.0 ml x (7.87 ml / 1 g)

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