A 50 Ω resistor in a circuit has a current flowing through it of 2.0 A. What is the power dissipated by the resistor? A. 50 W
B. 200 W
C. 100 W
D. 25 W

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

Which best represents the law of conservation of mass ?

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.