Two containers, X and Y, both contain nitrogen gas at a temperature of 30° C and a pressure of 1 atm. The initial volume of each of the containers is V30 = 0.5 liters. The only difference between the two containers is that while container X has a piston that is sealed and cannot move, the gas in container Y is allowed to expand against the surrounding atmosphere. QX is the amount of heat required to raise the temperature of the gas in container X by 10° C, and QY is the amount of heat required to raise the temperature of the gas in container Y by 10° C. What is the difference between QX and QY? Use 0°C = 273.15 K

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

Which accounts for an increase in the temperature of a gas that is kept a constant volume