Which of the following statements describes how energy is produced in the sun? a.) the sun burns fuels to generate energy. b.) as hydrogen changes into helium deep inside the sun, a great deal of energy is made. c.) energy is released as the sun shrinks because of gravity. d.) none of the above

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