Mac and tosh stand 12 meters apart and demonstrate the motion of a transverse wave on a slinky. the wave can be described as having a vertical distance of 1.2 meters from a trough to a crest, a frequency of 2.7 hz, and a horizontal distance of 0.5 meters from a crest to the nearest trough. what is the amplitude, period, and wavelength and speed of such a wave.

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

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c