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A 48.9 kg girl is standing on a 129 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.20 m/s relative to the ice surface in the direction of the positive x-axis.
What is the velocity of the plank relative to the ice surface?
(in m/s)
What is the velocity of the girl relative to the plank?
The positions of three particles, written as (x, y coordinates, are: particle 1 (mass 3.7 kg) at (4 m, 0 m); What is the location of the center of mass
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Determine the electrostatic potential energy of an electron in the ground state of the hydrogen atom
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A tungsten wire has a radius of 0.070 mm and is heated from 20.0 to 1416 oC. The temperature coefficient of resistivity is ? = 4.5 x 10-3 (Co)-1, How long is the wire
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