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You have a summer job working for a major manufacturer of audio components. The lead designer of loudspeakers asks you to make a calculation for a prototype speaker. The speaker coil consists of 200 turns of wire, 4.0 centimeter in diameter. The current in the speaker will be 2.5 Amp when the force on the speaker coil is 14.8 Newton. Find what strength magnetic field will give this force?
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A copper block is removed from a 300°C oven and dropped into 1.00 kg of water at 20.0°C. The water quickly reaches 26.5°C and then remains at that temperature. What is the mass of the copper block?
A 47.0 g golf ball is driven from the tee with an initial speed of 52.0 m/s and rises to a height of 23.8 m. determine the kinetic energy of the ball at its highest point
The first puck is deflected 38 below the +x axis and moves off at 0.37 m/s. Find out the speed and direction of the second puck after the collision.
A converging lens of focal length 0.187 m forms a virtual image of an object. What is the distance between the object and the lens
A gray kangaroo can bound across level ground with each jump carrying it 8.1m from the takeoff point. What is its maximum height above the ground
A proton travelling along the axis of a 2cm ring with a charge density of 5nC/cm is 5 cm from the center of of the ring and travelling toward it. What speed must it have to cross the ring's plane
a segment of wire carries a current of 25 a along the x axis from x -2.0 m to x 0 and then along the z axis from z0 to
Work and Power problem in physics A bacterium moves through water at a constant velocity. The bacterium uses it's flagellum to push on the water behind it to help it overcome the drag force of the water opposing it's motion, what is the power outp..
While a roofer is working on a roof that slants at 43.0 above the horizontal, If it starts 4.60m from the lower edge of the roof, how fast will the toolbox be moving
A cockroach of mass m lies on the rim of a uniform disk of mass 4m that can rotate freely about its center like a merry-go-round. compute the angular velocity of the cockroach-disk system
At 3.831 kHz the reactance in a circuit of a 3 mF capacitor and an inductor are equal in magnitude. What is the value of the inductor
an electric point charge of q1 5.03 nc is placed at the origin of the real axis. another point charge of q2 3.93 nc
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