Bob, of mass m, drops from a tree limb at the same time that Esther, also of mass m, begins her descent down a frictionless slide. If they both start at the same height above the ground, which of the following is true about their kinetic energies as they reach the ground? A) Bob's kinetic energy is greater than Esther's. B) Esther's kinetic energy is greater than Bob's. C) They have the same kinetic energy. D) The answer depends on the shape of the slide.
Answers: 2
Physics, 21.06.2019 13:30, deandrehudson18
What if? physicists often measure the momentum of subatomic particles moving near the speed of light in units of mev/c, where c is the speed of light, and 1 mev = 1.6 โ 10โ13 kg ยท m2/s2. based on this, what are the units of momentum for a high-speed subatomic particle in terms of fundamental si units?
Answers: 1
Physics, 22.06.2019 00:30, Waakkaa
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
Answers: 1
Bob, of mass m, drops from a tree limb at the same time that Esther, also of mass m, begins her desc...
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