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Question: A computer disk drive is turned on starting from rest and has a constant angular acceleration. If it took 0.750 seconds for the drive to make its second revolution,
1. How long did it take to make the first complete revolution?
2. What is its angular acceleration in rad/s2?
A circular coil with 79 turns of wire and a diameter of 18 cm is placed in a magnetic field given by B(t) = 5 t2 + 2 t + 3 T where t is time in seconds. The field is perpendicular to the plane of the coil. What is the induced EMF at t = 7 s?
A stick is resting on a concrete step with 1/7 of its length hanging over the edge. What is the magnitude of the angular acceleration of the stick at the instant shown
A boy can throw a ball a maximum horizontal distance of40.0 m on a level field. How far can he throw the same ball vertically upwards
Consider a concave mirror with a focal length of 15.54 cm. a) Find the image distance when the object distance is 15.54 cm. (Answer with -1000 if the image does not exist.) Answer in units of cm. b) Find the image distance when the object distance..
A glass window 0.35cm thick measures 84cm by 84cm. how much heat flows through this window per minute if the inside and outside temperture difference differ by 15 degree Celceus
Three uniform spheres are located at the corners of an equilateral triangle. find the magnitude of the initial acceleration of the third sphere
A thermodynamic system undergoes a process in which its internal energy increases by 490 J. At the same time, 250J of work is done on the system. Find the energy transferred to or from it by heat?
A heavy crate is attached to the wall by a light rope. Another rope hangs off the opposite edge of the box. If you slowly increase the force on the free rope by pulling on it in a horizontal direction, which rope will break? Ignore friction and th..
A block sits on the floor. What is the magnitude of the frictional force on it from the floor
In 35.0 s, a pump delivers 0.550 m3 of oil into barrels on a platform 25.0 m above the pump intake pipe. The density of the oil is 0.820 g/cm3. Compute the work done by the pump. Compute the power produced by the pump.
People immersed in strong unchanging magnetic fields occasionally report sensing a metallic taste. Calculate the emf that could be induced in a loop
A disk and a hoop of the same mass and radius are released at the same time at the top of an inclined plane. The height of the incline is 0.71m, Calculate the speed of the disk at the bottom of the inclined plane
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