Moon rocks are samples of the moon's crust that were collected and returned to earth by crew members of the various apollo thisons. many of the moon
rocks are made of basalt, a light, volcanic rock with a density
2.7 g/cm. if a moon rock has a mass of 482 g, what is its volume?

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

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost

Two balls, each with a mass of 0.5 kg, collide on a pool table. is the law of conservation of momentum satisfied in the collision? explain why or why not