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In a photoelectric effect experiment, no current flows unless the wavelength is less than 570nma) What is the work function of themetal?b) What is the stopping potential required flight of wavelength 400nm is used?
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A rock takes 2.1 s to hit ground when it is thrown straigh up from a cliff with initial velocity of 7.5 m/s. Calculate height of the cliff in m & length it would take to reach the ground if thrown down with same speed.
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