Which of the following statements about the tundra is not true? a. tundra means “treeless land.” b. plants and animals in the tundra have adapted to the extreme climate. c. temperatures in the tundra range from extreme highs to extreme lows. d. the alpine tundra can be found on mountaintops.

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