The temperature of an ideal gas in a sealed 0.60 m3 container is reduced from 440 K to 270K. The final pressure of the gas is 40kPA. The molar heat capacity at constant volume of the gas is 28.0 J/mol * K. What is the work done by the gas?

zero

-51 kJ

-66 kJ

66 kJ

51 kJ

A150 w lamp emits light of wavelength 590 nm uniformly in all directions. what is the photon flux (photons per unit area per unit time) on a small screen at a distance 2.3 m from the lamp? assume the photons are uniformly distributed over the surface of a sphere of radius 2.3 m.

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

Argon is adiabatically compressed from an initial volume of 16 liters to a final volume of 2 liters. by what factor do the following quantities change? do they increase or decrease? (a) the rms speed (b) the thermal energy of the gas (c) the molar specific heat cv (d) the pressure