Physics, 04.07.2019 12:30 smithcj0505
Astronomers use doppler shifts to calculate precisely how fast stars and other astronomical objects move toward or away from earth. for example the spectral lines emitted by hydrogen gas in distant galaxies which is normally found at a wavelength of 21 centimeters on earth, might be observed at 21.1 centimeters instead. what would this difference indicate to astronomers?
Answers: 1
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The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?
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Which sound characteristic is not affected by the relative motion of an object
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The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .
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Astronomers use doppler shifts to calculate precisely how fast stars and other astronomical objects...
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