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A 2.80 102 N force is pulling an 80.0 kg refrigerator across a horizontal surface. The force acts at an angle of 22.0° above the surface. The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 7.00 m. (a) Find the work done by the pulling force.
Given that the number of electrons per volume in aluminum is 3.01x10^56 electrons/m^3, determine the valence number (number of free electrons per atom)
A 1,699-kg satellite orbits the Earth in a circular orbit with a period of 6,016 s. How high above the Earth's surface is the satellite's orbit
Calculate the angular velocity of an electron orbiting a proton in the hydrogen atom, given the radius of the orbit is 0.500x10-10 m
initially a yoga ball is partially blown up and its surface area measured. afterwards it is filled completely and its
question11 in a youngrsquos double-slit experiment that uses electrons an angle that locates the first-order bright
What is the magnitude of the electric field at a point 0.45cm away from a point charge of +2.0pC? What is the direction of the electric field
A 2.00-m tall basketball player is standing on the floor 10.0 m from the basket. If he shoots the ball at a 40 degree angle from the horizontal, what is the acceleration of the ball at its maximum height? The height of the basket is 3.05 m.
you need to store 25J of energy in the magnetic field of a solenoid. The solenoid hass 100 circular turns of diameter 5.0cm, What is the energy density inside the solenoid
A woman is riding a Jet Ski at a speed of 24 m/s and notices a seawall straight ahead. what is the minimum distance from the seawall that she can begin making her turn and still avoid a crash
Unless otherwise stated, all objects are located near the Earth's surface, where g = 9.80 m/s2. A student weighing 660N crouches on a scale and suddenly springs vertically upward
A shell, fired from a cannon, has a muzzle speed (the speed as it leaves the barrel) of 800 ft/s. The barrel makes an angle of 45o with the horizontal and, for ease; the barrel opening is assumed to be at ground level.
A certain heat engine does 12.0 kJ of work and dissipates 8.00 kJ of waste heat in a cyclical process. What was the heat input to this engine
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