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Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.
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An object weigh 40n in air ,weigh 20n when submerged in water,and 30n when submerged in a liquid of unknown liquid density.what is the density of unknown of liquid?
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In the first law of thermodynamics, triangle e=q-w, what does q stand for
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While standing outdoors one evening, you are exposed to the following four types of electromagnetic radiation: yellow light from a sodium street lamp, radio waves from an am radio station, radio waves from an fm radio station, and microwaves from an antenna of a communications system. rank these type of waves in terms of increasing photon energy.
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A string with mass per unit length of 0.003 kg/m is plucked with an amplitude of 2 cm. The string is...
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