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starting from rest, a 4.0-kg crate of cell phones reaches a horizontal speed of 8.0 m/s in 2.0 s. What is the net force acting on the crate?
q1. a proton moves perpendicular to a uniform magnetic field at a speed of 1.80 x 107 ms and experiences an
A 2.0-cm-diameter spider is 1.50m from a wall. Determine the focal length of a lens that will make a half-size image of the spider on the wall
A metal rod 6.00 m long is held in a horizontal position. what is the torque exerted on the rod by the tension in the rope
A person weighing 700N on a wire. find the tension force in the two segments of the wire. left wire 20 degrees and right wire 40 degrees.
Consider the mass spectrometer shown schematically in the figure below. The electric field between the plates of the velocity selector is 2100 V/m, Calculate the radius r of the path for a singly charged ion with mass m = 2.29 10-26 kg
What is braking distance for the first train
The downward acceleration of a 74-kg stuntwoman near the end of a fall from a very high building is 5.5m/s2
The skis have a thrust of 189 N and a coefficient of kinetic friction on snow of 0.1. Unfortunatately, the skis run out of fuel after only 9 s. Illustrate what is Sam's top speed?
q1. what is the maximum speed with which a 1200- car can round a turn of radius 71 on a flat road if coefficient of
two capacitors c1 and c2 with capacitors of 0.25 uf and 0.50 uf respectively are connected in parallel across on 80 volt circuit, what is the total charge stored in the capacitor
A physics student in a hot air balloon ascends vertically at constant speed. suppose the following four forces that arise in this situation.
Solar energy is incident on the pond at an average rate of 400 . If the water absorbs all the solar energy and does not exchange energy with its surroundings, explain how many hours will it take to warm from 15 to 25 ?
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