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A 4.2 gram feather falls with a constant speed of 1.2 m/s What is the force of air resistance on the feather?
A disk-shaped merry-go-round of radius 2.63 m and mass 155 kg rotates freely with an angular speed of 0.763 rev/s, Calculate the initial and final kinetic energies for this system.
Originally, light is unpolarized. It then travels through 3 polarizers: the first with its transmission axis aligned vertical, What is the intensity of light after the third polarizer
An object of mass m = 3.1 g and charge q = +48 μc is attached to a string and placed in a uniform electric field that is inclined at an angle of 30 degrees with the horizontal. The object is in static equilibrium when the string is horizontal.
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 satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.55 10^4 m/s, and the radius of the orbit is 5.50 10^6 m. What is the orbital speed of the second satellite
A -3.4 nC charge is on the x-axis at x1 = -7 cm and a 4.2 nC charge is on the x-axis at x2 = 13cm. At what point or points on the y-axis is the electric potential zero
A cylindrical barrel with a radius of 30 centimeter and a mass of 75 kilogram rolls across a warehouse floor without slipping. The speed of the barrel's center of mass is 8.0 m/s. Compute the total kinetic energy of the barrel
A ship crosses a river aiming at the angle θ to the left from the straight course. The speed of the ship with respect to water is v'. The width of the river is d and the water velocity is u to the right. What will be the side displacement h of the..
an electron is initially at rest just outside a large copper surface that has a charge density of 1.04 x 10-6 cm2. how
the human heart has to pump the average adults 5.8 of blood through the body every minute. the heart must do work to
In a die-casting operation 0.1 kg charges of molten zinc alloy at 410 degrees C are injected at a rate of 120 charges per hour. Calculate the average die temperature after a die-casting operation
A 1600 kg submarine rises straight up towards the surface. Seawater exerts both an upward buoyant force of 16430 N on the sub, with a downward resistive force of 1000 N. What is the submarine's acceleration.
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