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A ten pound car wheel has a moment of inertia of 0.52 kg m2. While rotating at a constant speed the wheel makes 69.91 revolutions in 9.82 s. How much torque is required to stop the wheel in 43.21 s?
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Question: You are experimenting with a radioactive sample of polonium. At the end of 14.0 minutes, exactly 1/16 of the polonium remains. What is the corresponding half life (T 1/2 ) of polonium? The response must be type ...
Need help answering this question The ancient Egyptians used simple machines to build the pyramids. Discuss how you might use one or more of the simple machines to move the massive stone blocks up the growing pyramid, an ...
The equation for motion for the ideal spring-mass system as derived in class is, ma+kx=0, where, m=mass, a=acceleration, k=spring stiffness, and x=displacement. 1) Describe briefly how the equation for motion arises from ...
Question: A rock thrown with speed 12.0m/s and launch angle 30.0 degrees (above the horizontal) travels a horizontal distance of d = 15.5m before hitting the ground. From what height was the rock thrown? Use the value g ...
Question: A proton (with a rest mass m=1.6 x 10 27 kg) has a total energy that is 4.00 times its rest energy. What is the magnitude of the momentum p of the proton? Please explan in detail each step and what equations ar ...
Question: Tectonic plates are large segments of the earths crust that move slowly. suppose that one such plates has an average speed of v=2.1 cm/ year. a) What distace d, in meters, does the plate move 1.4 seconds at thi ...
Question: In a physics laboratory experiment, a coil with 230 turns enclosing an area of 12.1 cm2 is rotated during the time interval 4.10Ã-10?2 s from a position in which its plane is perpendicular to Earth's magnetic f ...
Question: A ring of radius R has total charge Q. A) At what distance along the z-axis is the electric field strength a maximum? Express your answer in terms of R. B) What is the electric field strength at this point? Exp ...
Question: A physics student uses a force P of magnitude 70N and angle = 50 degrees (with respect to the horizontal) to push a 5.2 kg block across the ceiling of her room, as shown in the figure to the right. The coeffici ...
Question: An object of mass m is dropped from height h above a planet of mass M and radius R. Find an expression for the object's speed as it hits the ground. Express your answer in terms of the variables m,M,h,R and app ...
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