On Earth, an astronaut has a mass of 140 kg. When the astronaut goes into space, she
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Mike walks 100 meter north, then walks 30 meters south. after this, he walks another 10 meters north. what is the magnitude of his total displacement during this walk, in meters?
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In a good thermo flask the main cause of heat loss is
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Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?
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