Three identical train cars, coupled together, are rolling east at speed v0. A fourth car traveling east at 2v0 catches up with the three and couples to make a four-car train. A moment later, the train cars hit a fifth car that was at rest on the tracks, and it couples to make a five-car train. What is the speed of the five-car train?
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Physics, 20.06.2019 18:04
The density of gold is 19.3g/cm3. what is the volume of a 13 g gold nugget? ( density: d= m/v)
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The average atmospheric pressure on earth is approximated as a function of altitude by the relation patm = 101.325 (1 β 0.02256z)5.256, where patm is the atmospheric pressure in kpa, and z is the altitude in km with z = 0 at sea level. determine the approximate atmospheric pressures at atlanta (z = 306 m), denver (z = 1610 m), mexico city (z = 2309 m), and the top of mount everest (z = 8848 m).
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Three identical train cars, coupled together, are rolling east at speed v0. A fourth car traveling e...
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