A cylinder of nitrogen gas has a volume of 1.8×10^4 cm^3 and a pressure of 120 atm. What is the thermal energy of this gas at room temperature (20∘C)?

What is the mean free path in the gas?

The valve is opened and the gas is allowed to expand slowly and isothermally until it reaches a pressure of 1.0 atm. What is the change in the thermal energy of the gas?

What is the rate of change in a objects position?

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.