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24-gauge copper wire has a diameter of 0.51 mm. The speaker is located exactly 6.65 m away from the amplifier. What is the minimum resistance of the connecting speaker wire at 20 C?
Hint: How many wires are required to connect a speaker.Compare the resistance of the wire to the resistance of the speaker (Rsp = 8 Ω)
Consider a box in the back of a truck. If the truckaccelerates slowly the box moves with the truck without slipping. What forces act on the box to accelerate it? In what direction do those forces point, please show in a free body diagram?
The graph shows the net external force component Fcos along the displacement as a function ofthe magnitude s of the displacement. The graph applies toa 59.4-kg ice skater.
A 1800 kg pile driver is used to drive a steel I-beam into the ground. calculate the average force the beam exerts on the pile driver while the pile driver is brought to rest
A 0.458 kg metal cylinder is placed inside the top of a plastic tube, the lower end of which is sealed off by an adjustable plunger, what is the initial acceleration of the metal cylinder
A car battery stores about 4.0MJ of energy. If all this energy were used to create a uniform electric field of 32kV/m, What volume would it occupy
A camera with a 70.0-mm lens can focus on objects located from 1.40 m to an infinite distance away by adjusting the distance between the lens and the film. how far does the lens move with respect to the film
A baseball is thrown from the roof of 23.1 -tall building with an initial velocity of magnitude 11.5 and directed at an angle of 52.0 above the horizontal. What is the speed of the ball just before it strikes the ground? Use energy methods and ignore..
A wheel, starting from rest, rotates with a constant angularacceleration of 2.70 rad/s2. What was the angular velocity of the wheel at thestart of the 3.00 s interval
An immersible heater coil is to be designed to heat an insulated container with 4 liters of distilled water from 20 degrees to 50 degrees C in less than 30 minutes. what is the resistance of the heating coil
The plates of a cathode ray tube are parallel and are 5 mm apart. What is the acceleration of the electron
q1. a tennis ball of mass 57 g travels with velocity lt 48 0 0 gt ms toward a wall. after bouncing off the wall the
A 1.8-kg cylinder (radius = 0.08 m, length = 0.50 m) is released from rest at the top of a ramp and allowed to roll without slipping. The ramp is 0.82 m high and 5.0 m long. What is its translational kinetic energy? What is its rotational kinetic ene..
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