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How long is the flea in the air from the time it jumps to the time it hits the ground
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Physics, 22.06.2019 16:30
An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?
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Physics, 22.06.2019 16:30
Select all the correct answers. which three statements about electromagnetic radiation are true?
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Physics, 22.06.2019 22:00
Which statement best explains why the overall charge on an atom is zero?
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Physics, 23.06.2019 02:00
Elements that have one valence electron and are very reactive are called
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