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A 0.250 m radius, 500-turn coil is rotated one-fourth of a revolution in 4.17 ms, originally having its plane perpendicular to a uniform magnetic field. (This is 60 rev/s.) Find the magnetic field strength needed to induce an average emf of 10,000 V
A lens for a 35-mm camera has a focal length given by f = 40mm. What is the magnification of the image on the film
In a railroad switchyard, a 50 ton freight car is sent at 7.4 mi/h toward a 27 ton car that is moving in the same direction at 2.0 mi/h. What is the speed of the pair after they couple together
The aurora is caused when electrons and protons, moving in the earth's magnetic field of ?5×10?5 T, collide with molecules of the atmosphere, find Radius of the electron and proton in m
A swimming pool has dimensions 32 m 11 m and a flat bottom. When the pool is filled to a depth of 2.10m with fresh water, what is the force caused by the water on the end that is 11m.
A fan blade rotates with angular velocity given by ?z(t)= ? ? ? t2, where ? = 4.60rad/s and? = 0.795rad/s3, Calculate the angular acceleration as a function of time
An aquarium contains a 5-cm layer of water n=1.333 floating on top of carbon tetrachloride. what is the angle of refraction into the air
A block of mass 3.41 kg is attached to a spring (k=31.9 N/m) by a rope that hangs over a pulley of mass M=6.82 kg and radius R=3.61 cm. find the maximum extension of the spring
A meter stick is found to balance at the 49.7-cm mark when placed on a fulcrum. What is the mass of the meter stick
An arrow is shot at an angle of theta=45 above the horizontal. The arrow hits a tree a horizontal distance D=220m away, at the same height above the ground as it was shot. Use g=9.8 m/s^2 for the magnitude of the acceleration due to gravity
A stunt driver is attempting to jump 20 cars of total length of 42m using an inclined ramp. Calculate how long the stunt driver is in the air during this stunt
Evaluate maximum altitude?
A man wants to swim across a river that flows N to S at 5 m/s.He can swim at a speed of 7m/s. how far south did he travel
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