A50-g ice cube at 0ºc is submerged into a container of liquid nitrogen. how many kg of nitrogen evaporates if it is at its boiling point of 77k and has a latent heat of vaporization of 200 kj/kg? the specific heat of ice is 2100 j/(kg ºc).

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

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

The pressure proportional to the area a- inversely b- directly c- increase d-decrease