Three asteroids have exactly the same amount of mass. the distance from asteroid a to asteroid b is 200 km, the distance from asteroid b to c is 100 km, and the distance from c to a is 250 km. between which two asteroids would the gravitational force be the largest? a. between asteroid a and b. b. between asteroid b and c. c. between asteroid c and a. d. the gravitational force between each pair of asteroids would be the same.

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.