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Suppose 12.5 g of oxygen (O2, 32.0 g/mol) is heated at constant atmospheric pressure from 19.0°C to 100°C.
(a) How many moles of oxygen are present?
(b) How much energy is transferred to the oxygen as heat? (The molecules rotate but do not oscillate.)
(c) What fraction of the heat is used to raise the internal energy of the oxygen?
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An isolated copper sphere of radius 4.85cm, at first uncharged, is illuminated by ultraviolet light of wavelength 244nm. The work function for copper is 4.70 eV. What charge does the photoelectric effect induce on sphere.
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A coil with an inductance of 16.8 H and a resistance of 5.5 ? is suddenly connected to a resistanceless battery with an ? = 194.0 V. What is the rate at which thermal energy is appearing
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The semiconducting compound ZnS is widely used for ultraviolet light emitting diodes (LED's). find the frequency of light emitted by a ZnS LED
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