Physics, 04.12.2020 01:00, briannastuck

A 25 kg rock falls for 1.7 seconds. How many meters tall
was the building?

Answers: 3

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Physics, 21.06.2019 22:20, CM0

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage

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Physics, 21.06.2019 23:00, crummar01

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

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Physics, 22.06.2019 08:30, 2021arabellacorsino

An object weigh 40n in air ,weigh 20n when submerged in water, and 30n when submerged in a liquid of unknown liquid density. what is the density of unknown of liquid?

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Physics, 22.06.2019 11:50, sillslola816oxb5h7

The scalar triple product computes the magnitude m of the moment of a force vector f about a specified line. it is m = (r × f) · n, where r is the position vector from the line to the point of application of the force and n is a unit vector in the direction of the line. use matlab to compute the magnitude m for the case where f = [12, −5, 4] n, r = [−3, 5, 2] m, and n = [6, 5, −7].