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Pete slides a crate up a ramp at an angle of 23.1 degree by exerting a 138 Newton force parallel to the ramp. The crate moves at constant speed. The coefficient of friction is 0.257.
Compute how much work has been done against gravity when the crate is raised a vertical distance of 1.89 m?
Answer in units of J.
The magnetic field at the center of a 1.0-cm-diameter loop is 4.5 mT, What is the current in the loop, At what distance from the wire is the magnetic field 4.5 mT
A 0.2kg toy car rolls down ramp. If the car started from rest at a height of 0.30m, what is its speed at the bottom of the ramp? Incorrect: Your answer is incorrect. At the bottom, it hits another stationary car with equal mass. The two cars have Vel..
A 54.00 kg bungee jumper has fallen far enough that her bungee cord is beginning to stretch and resist her downward motion. Find out the force (magnitude and direction) exerted on her by the bungee cord at an instant while her downward acceleratio..
A long solenoid that has 1,105 turns uniformly distributed over a length of 0.452 m produces a magnetic field of magnitude 1.00 10-4 T at its center
two moles of an ideal gas at 400 K expand quasi-statically and isothermally from an initial volume of 31.0 L to a final volume of 86.0 L. What is the entropy change of the universe for this process
The power radiated by an object is 145 W. If the object were a perfect blackbody radiator (and otherwise was the same) it would radiate 587 W. What is the emissivity of the object
A child on a boat throws a 5.40 kg package out horizontally with a speed of 12.0 m/s. determine the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 26.5 kg and the mass of boat is 55.5 kg.
Two equal and opposite charges of magnitude 2.00µC and -2.00µC are held .15 m apart. What force (magnitude & direction) would act on an electron placed at the midway point
Determine the first three normal-mode frequencies for a pipe of length L that is closed at both ends. Use the results of part A to estimate the normal-mode frequencies of a shower stall. (Assume that a shower has a length of 1.42{\rm m} ).
While the repair shop works on your voltmeter, they loan you an unusual replacement: Rather than measuring the potential difference across a resistor, it measures the amount of charge that flowed, and the change in electric potential energy of tha..
An object is released from an aeroplane which is diving at an angle of 30 from the horizontal with a speed of 50m/s. If the plane is at a height of 4000m from the ground when the object is released, find the velocity of the object when it hits the gr..
Sunlight reflects the surface of a swimming pool. At what angle the reflected light is 100% polarized
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