Physics, 18.09.2019 04:00 owenwernert
Light travels at a constant speed of 3.0×108 m/s in a vacuum. (a) it takes light about 1.3 seconds to travel from the earth to the moon. estimate the distance of the moon from the earth's surface, in meters. (b) the astronomical unit (abbreviated au) is equal to the distance between the earth and the sun. one au is about 1.5×1011 m. if the sun suddenly ceased to emit light, how many minutes would elapse until the earth went dark?
Answers: 1
Physics, 22.06.2019 01:50
Arod of some material 0.20 m long elongates 0.20 mm on heating from 21 to 120°c. determine the value of the linear coefficient of thermal expansion [in (degrees c)^-1] for this material.
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Physics, 22.06.2019 02:30
Awave travels at a speed of 5.2 m/s. if the distance between crests is 0.40 m, what is the frequency of the wave? use f=v/wavelength a. 13 hz b. 2.1 hz c. 0.077 hz d. 5.6 hz
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Physics, 22.06.2019 18:30
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Physics, 22.06.2019 21:30
Contrast the force of gravity between these pairs of objects: 1-kg mass and a 2-kg mass that are 1 m apart; a 1-kg mass and a 2-kg mass that are 2 m apart; and two 2=kg masses that are 1 m apart. i dont understand.
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Light travels at a constant speed of 3.0×108 m/s in a vacuum. (a) it takes light about 1.3 seconds t...
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