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a loud speaker has an input of 73 db if the volume of the sound is turned up therefore that the output intensity is 10
one goal of the russian space program is to illuminate dark northern cities by sunlight reflected to the earth from a
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suppose two electrons in an atom have quantum numbers n 3 and l 1 a how many states are possible for those two
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a capacitor is constructed of two concentric conducting cylindrical heels the radius of the inner cylindrical shell is
a steel beam is utilized in the construction of a skyscraper by what fraction deltall0 does the length of the beam
a stretched string has a fundamental frequency of 175 hz discover the new frequency if you simultaneously do all of the
how fast must an electron move to have a kinetic energy equal to the energy of a photon of wavelength l 600 nmthe
a proud deep-sea fisherman hangs a 666 kg fish from an ideal spring having negligible mass the fish stretches the
a dentist uses a mirror to examine a tooth that is 075 cm in front of the mirror the image of the tooth is formed 80 cm
carbon tetrachloride a 30mm thick layer of water n 133 floats on a 50 mm thick layer of carbon tetrachloride n 146 in
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ice of mass 495 g at -99deg c is added to 202 g of water at 139deg c in a 94 g glass container of specific heat
an engine receives 890 j of heat from a hot reservoir and gives off 370 j of heat to a cold reservoira what is the work
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carbon tetrachloride a 30mm thick layer of water n 133 floats on a50 mm thick layer of carbon tetrachloride n 146 in