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Problem: Superman, who likes physics, dangles his watch from a thin piece of string while he is taking off from ground horizontally at a constant acceleration. He notices that the string makes an angle of θ=31° with respect to the vertical.
Part A: After 19seconds, what is his speed?
I want you to explain the physics in this problem.
Monochromatic light of a given wavelength is incident on a metal surface. However, no photoelectrons are emitted. how should the incident light be adjusted
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