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Constants: Mass of electron = 9.11 x 10-31 kg, h = 6.626 x 10-34 J.s, c = 3 x 108 m/s; 1 eV = 1.6 x 10-19 J, Mass of a proton or neutron = 1836 x mass of electron, Mass of aluminum atom = 26.9 amu, 1amu = 1.66 x10-27 kg.
(a) In Photoelectric Effect experiment, stopping voltage V0 = 30 volts. Find the maximum kinetic energy and velocity of the ejected photoelevctron.
(b) The work function of a metal is 5.2 eV. Find the threshold wavelength for this Metal. Can a light photon of wavelength 560 nm eject a photoelectron from this metal?
A rescue helicopter lifts a 80.7-kg person straight up by means of a cable. Use the work-energy theorem and find the final speed of the person
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