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A 19 g piece of Styrofoam carries a net charge of -8.5 µC and floats above the center of a large horizontal sheet of plastic that has a uniform charge density on its surface. What is the charge per unit area on the plastic sheet?
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Question: A textbook of mass 1.98kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.160m , to a hanging book with mass 3.01kg . The system is released fro ...
Question: A particle moving along the y-axis has the potential energy U = 4y^3J, where y is in m. A) Graph the potential energy from y=0m to y=2m. B) What is the y-component of the force on the particle at y=0m? C) What ...
An object traveling with a speed of 37.7 suddenly experiences a constant acceleration of 7.71 m/s 2 . What distance does this object travel in 6.48 seconds?
Question: Six artificial satellites complete one circular orbit around a space station in the same amount of time. Each satellite has mass m and radius of orbit L. The satellites fire rockets that provide the force neede ...
Question: For this problem, take the distance from the Earth to the Sun to be 1.5 x 10 11 m and the radius of the Earth to be 6.38 x 06m. A) Using the fact that the earth orbits the Sun once per year, calculate the Earth ...
Question: A slingshot will shoot a 10-g pebble 22.0 m straight up. Part A: How much potential energy is stored in the slingshot's rubber band? Express your answer using two significant figures. Part B: With the same pote ...
Question: A point charge is released from rest in a region containing an electric field. The charge will start to move: (A) in a direction that makes its potential energy increase (B) in a direction that makes its potent ...
At equator, Earths radius is about 6370 km. A plane flies in low altitude at constant speed of v=226 m/s. Plane can produce average deceleration of a=18,/s^2 when landing. How long in seconds would it take the plane to c ...
Fire Behavior and Combustion. When pump operators apply pressure to water in pre-connect hose lines there is a limit on the amount of water and velocity at which the water will travel through the hose lines. This is refe ...
A system of four particles moves along one dimension. The center of mass of the system is at rest, and the particles do not interact with any objects outside of the system. Find the velocity, v4, of particle 4 at t1 = 2. ...
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