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A uniform 200 Newton board length L has two weights hanging from it. 300 N at l/3 from one end, and 400 N 3L/4 from the same end. Find what single additional force acting on the board will produce equilibrium?
Four point charges have the same magnitude of 7.60 *10^-12 C and are fixed to the corners of a square that is 2.0 cm on a side. Determine the magnitude of the net electric field that exists at the center of the square
A projectile is fired with an initial speed of 164 m/s. Find the angle of projection such that the maximum height of the projectile is equal to 0.5 times its horizontal range
Calculate the de Broglie wavelength for an alpha particle (He-e nucleus) with energy E = 4.2 GeV (which is emitted in the radioactive decay of U-238)
A 0.16 gram spider hangs from the middle of the first thread of its future web. The thread makes an angle of 7.2o with the horizontal on both sides of the spider. Estimate what is the tension in the thread
A coal-fired plant generates 600MW of electric power. Theplant uses 4.8 X 10^6 kg of coal each day and the heat ofcombustion is 3.3 X 10^7 J/kg. What is the Carnot efficiency
During an experiment you determine the cat off wavelength of a cathod ray tube to be λ0. What are the stopping voltage(potential) and electron velocity in terms of λ0 for second experiment
An ultralight plane and pilot have a total mass of 156 kg. what is the net force acting on the plane and pilot
A sports car travling at 24.7 m/s slows at a constant rate to stop in 16.00 s . what is the average acceleration of the sports car in this time interval?
A point moves along the x-axis with its position, x, at time t given by x(t) = t3 - 3t2 + 2t - 1. Which of the following is the acceleration when t = 2?
A jet plane is flying with a constant speed along a straight line, at an angle of 35.0 ° above the horizontal. What is the magnitude of the thrust force
A dance studio has flat mirrors on opposite walls, and multiple images are observed when a person stands between them, What is the image distance for the first image behind the north mirror
The measured current in a circuit in your uncle's house is 12 A current. In this circuit, the only appliance that is on is a space heater that is being used to heat the bathroom. What is the voltage at the wall outlet in the bathroom
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