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A circular coil (980 turns, radius = 0.043 m) is rotating in auniform magnetic field. At t = 0 s, the normal to the coilis perpendicular to the magnetic field. At t = 0.013 s,the normal makes an angle of 45o with the field becausethe coil has made one-eighth of a revolution. An average emf ofmagnitude 0.077 V is induced in the coil. Find the magnitude of the magnetic field at the location of the coil.
A fire house 4.0cm in diameter is capable of spraying water at a velocity of 10 m/s. For a continuous horizontal flow of water, what horizontal force should a fireman exert on the hose to keep it stationary
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.8×106 one at an angle 17 degrees west of north, What is the total work they do on the supertanker
A horizontal force F{x} =F0 (1-t / T), which decreases from F0 at t =0 to zero at t =T, is exerted on the object. Find an expression for the object's velocity
how much time passes before the brick lands on the ground.
The distance to a point source is increased by a factor of 7. By what factor does the intensity increase
A 170 ball is dropped from a height of 1.8 , bounces on a hard floor, and rebounds to a height of 1.0. What maximum force does the floor exert on the ball
Blocks sliding 1 A block with mass m = 17.0 kg rests on a frictionless table and is accelerated by a spring with spring constant k = 4304.0 N/m after being compressed a distance x1 = 0.576 m from the spring’s unstretched length. The floor is frict..
a 5.0 kg block slides from rest down a frictionless slope, then enters a flat area where Uk is 0.50. What is the speed of the block at the base of the slope
The diffusion constant for the alcohol ethanol in water is 1.24 10-9 m2/s. A cylinder has a cross-sectional area of 3.85 cm2 and a length of 1.82 cm. what mass of ethanol diffuses through the cylinder
What would be the height of the atmosphere if the air density were uniform and decreased linearly to zero with height
35 kg girl is bouncing on a trampoline. Throughout a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 170 J from 470 J. How high does she rise during this interval? Avoid air resistance.
assume the mass of cart 1 is m1 = 234 g and the mass of cart 2 is 181 g. Calculate the energy lost in the collision
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