Physics, 05.07.2019 02:20 19elbatawisaly
Aspring-loaded toy gun is used to shoot a ball of mass 1.5 kg straight up in the air, as shown. the spring has spring constant 777 n/m. if the spring is compressed a distance of 20.0 centimeters from its equilibrium position and thern released, the ball reaches a maximum height (measured from the equilibrium position of the spring). there is no air resistance, and the ball never touches the inside of the gun. assume that all movement occurs in a straight line up and down along the y axis. (a) how much energy is stored in the spring when it is compressed 20.0 cm? (b) find the maximum height of the ball. (c) find the muzzle velocity of the ball (i. e., the velocity of the ball at the spring's equilibrium position)
Answers: 2
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Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.
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Achemistry student needs of 40ml diethylamine for an experiment. by consulting the crc handbook of chemistry and physics, the student discovers that the density of diethylamine is 0.7 . calculate the mass of diethylamine the student should weigh out. round your answer to significant digits.
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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
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