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A hand-cranked AC generator is used to cause 0.65 A of current (rms) to flow through a 30W resistor in parallel with a 60 W resistor. What is the minimum average rate at which work must be done on the generator?
Fraternal twins Jack and Jill are sent in two different ships to fetch water from the planet Kusbane that is 20 lightyears away. what is the age difference between Jack and Jill when Jack's ship arrives at Kusbane
A parachutist descending at a speed of 10.0 m/s loses a shoe at an altitude of 30.0 m. (Assume the positive direction is upward.). Explain when does the shoe reach the ground? What is the velocity of the shoe just before it hits the ground?
A converging lens has 31.3 cm focal length, and is placed 20.9 cm behind a diverging lens. Parallel light strikes the diverging lens, What is the focal length of the diverging lens in cm
assume that for the couple in, you were told that the girl's mass was two-thirds that of the boy. The boy has a velocity of v = +0.61 m/s. What would be the girl's velocity in this case.
We pass a laser beam through a double slit. On a screen 18.52 m away, we observe a series of bright lines which are 3.4 mm apart. What is the distance between the two slits
A 1800 kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 6 m before coming into contact with the top of the beam, and it drives the beam 14.0 cm farther into the ground before coming to rest.
A negative charge of -0.55 uC exerts an upward 0.200N force on an unknown charge 0.300m, What is the unknown charge (magnitude and sign)
An ideal monatomic gas at first has a temperature of 311K and a pressure of 7.57atm. It is to expand from volume 571 cm3 to volume 1390 cm3.
A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle, What is the mass of the wheel
A 2.50-g bullet travelling at a speed of 425 m/s, strikes the wooden block of a ballistic pendulum, such as that Figure in 7.12. The block has a mass of 215 g. Calculate the speed of the bullet/block combination quickly after the collision.
Astronomers determine that a nearby galaxy is moving toward our galaxy at a speed of 720.0 km/s with respect to the Earth, what was the wavelength emitted by the star
For a short time, the path of the plane is described by If the plane is rising with a constant velocity of 10 m/s, determine the magnitudes of the velocity and acceleration
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