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Physics, 21.06.2019 13:00
Explain the doppler effect in terms of frequency, wavelength, and speed.
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Physics, 21.06.2019 18:00
Amanometer is used to measure the air pressure in a tank. the fluid used has a specific gravity of 1.25, and the differential height between the two arms of the manometer is 34 in. if the local atmospheric pressure is 12.7 psia, determine the absolute pressure in the tank for the cases of the
Answers: 3
Physics, 22.06.2019 07:10
Polly is pushing a box across the floor with a force of 30 n. the force of gravity is β8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?
Answers: 2
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?
Answers: 1
A catapult flings a stone at 16 m/s, giving it 1892 J of kinetic energy. What is the mass of the sto...
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