The length of the mercury thread is found to be 4cm and 24cm at ice point and steam point respectively on an ungraduated thermometer. What is the temperature corresponding to a length of 8cm?

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

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

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of