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Question1
A long solenoid has 100 turns/cm and carries a current i. An electron moves within the solenoid in a circle of radius 0.021 cm perpendicular to the axis of the solenoid. The speed of electron is 0.042c (c is the speed of light).What is the current i?
Question2
Assume a crate of mass 8.8 kg is placed on the plank at a distance x = 4.5 m from the left end. If the plank has a mass of 12 kg, find the forces exerted by the two supports on the plank.
Question3
A ball is thrown straight down with an initial velocity of 15 m/s. At accurately the same time, a second ball is thrown straight down from a position 5 m straight below the first ball. The initial velocity of the second ball is 2 m/s. How long after being thrown will the balls collide?
A 332 kg piano slides 3.54 m down a 31.2° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. Calculate the net work done on the piano
A plank 2.00 cm thick and 16.6 cm wide is firmly attached to the railing of a ship by clamps so that the rest of the board extends 2.00 m horizontally over the sea below. estimate the shear modulus of the wood
Find the rms voltage across each element in an RLC circuit with R = 9.9k? , C = 0.14?F , and L = 27mH
Under certain conditions, the human body can withstand an acceleration of 10 g%u2019s. What is the net force (in Newtons) acting on a person
After catching the ball, Sarah throws it back to Julie. The ball leaves Sarah's hand a distance 1.5 meters above the ground, What is the speed of the ball when it leaves Sarah's hand
During a fun run a girl runs for 12 s moving 2.7 m/s. She then accelerates at 0.5 m/s^2 over the next 25 m. she then runs at her new speed for 10s. What distance did she cover during the entire period?
A pair of flat mirrors meet to form a right angle. A beam of light is incident on one of them at a point 11.5 cm from their point of intersection, find what is the angle of incidence at the first mirror
A small motor is mounted on the axis of a space probe with its rotor (the rotating part of the motor) parallel to the axis of the probe. Through how many revolutions has the rotor turned
A 7.0kg hammer strikes a nail at a velocity of 8.6m/s and comes to rest in a time interval of 8.0 ms, estimate the average force acting on the nail
A magnetic field of magnitude 0.38 T is directed vertically upward, Find the magnetic flux through a flat surface of area 22 cm2 if the surface is horizontal
A flywheel 0.400 m in diameter pivots on a horizontal axis. A rope is wrapped around the outside of the flywheel, and a steady pull of 80.0 N is exerted on the rope. What is the angular acceleration of the flywheel
A certain airplane has a speed of 250.0 km/h and is diving at an angle of 30.0° below the horizontal when the pilot releases a radar decoy. The horizontal distance between the release point and the point where the decoy strikes the ground is 700 m..
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