Ablock (m=5.00 kg) is attached to a spring (k=315 n/m) and placed on a frictionless surface. the block is displaced 15.0 cm to the left of its equilibrium position and released at time = 0. where is the block at t = 0.555 sec?

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

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

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change? work power gravitational energy chemical energy