Balloon is filled with air and initially occupies a volume of 10 cm3 at a pressure of 150 kpa and temperature of 20o c. the balloon is then moved to warmer environment of 40o c and comes into thermal equilibrium with a final volume of 10.5 cm3 . assuming ideal gas behavior and a polytropic process for the air (pvn = constant) then determine the: a) work done by the air (j), b) heat transfer to the air (j).

Amodel rocket with a mass of 0.212 kg is launched into the air with an initial speed of 84 m/s. how much kinetic energy will the rocket have at a height of 214 m? assume there is no wind resistance. 634 j 303 j

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount

Which of the following statements are true for an isothermal process? check all that apply. - during an isothermal process, the work done by the gas equals the heat added to the gas. - during an isothermal process, the internal energy of the system changes. - an isothermal process is carried out at constant temperature. - an isothermal process is carried out at constant pressure. - an isothermal process is carried out at constant volume.