Astone is held at a height h above the ground. a second stone with four times the mass of the first one is held at the same height. the gravitational potential energy of the second stone compared to that of the first stone is a) one-fourth as much b) one-half as much c) twice as much d) four times as much e) the same.

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 long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

You will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. (refer to the walk-through video to locate the online lab within the online textbook).