Physics, 05.05.2020 15:35 mgreer432

How much does a 200 kg car weigh?

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Physics, 22.06.2019 11:00, Arielledt10

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?

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Physics, 22.06.2019 12:20, luella614ox1zum

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.

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Physics, 22.06.2019 14:10, chuchi24

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).

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Physics, 22.06.2019 22:00, natalie2sheffield

Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?