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Q1. A 750 gram grinding wheel 25.0 cm in diameter is in the shape of a uniform solid disk. (We can overlook the small hole at the center). When it is in use, it turns at a consant 220 rpm about an axle perpendicular to its face through its center. As the power switch is turned off, you observe that the wheel stops in 45.0 s with constant angular acceleration due to friction at the axle. What torque does friction exert even as this wheel is slowing down?
Q2. With what tension should a rope with length 3.00m and mass 0.135kg be stretched for transverse waves of frequency 43.0Hz to have a wavelength of 0.720m?
A sample of wood from an archaeological excavation is dated by using a mass spectrometer to measure the fraction of 14C atoms. What is the wood's age
a ball is thrown upward from the roof of a building, passes the roof going down three seconds later, how fast did the ball strike the ground
Three point charges, A = 1.80 µC, B = 7.50 µC, and C = -3.80 µC, are located at the corners of an equilateral triangle, Find the magnitude (N/C) at point A, and the direction in degrees counterclockwise from the positive x-axis
Two wires A and B are of equal length. Each is attached at one end to the ceiling and to a weight at the other end. The cross-sectional area of A is 2.00 mm2 and that of B is 4.00 mm2.
A spacecraft is traveling with a velocity of v0x = 5675 m/salong the +x direction. Two engines are turned on for a time of 847 s. One engine gives the spacecraft an acceleration in the +x direction of ax = 1.25 m/s2,while the other gives it an acc..
at some point in space,the x and y components of the electric field are Ex= 1.73 N/C, respectively and Ey= 3.75 N/, respectively. What is the net charge of the particle
A parallel-plate capacitor with area 0.900 m2 and plate separation of 4.00 mm is connected to a 18.00-V battery. Find the magnitude of the charge density on each plate
A moving 3.30kg block collides with a horizontal spring whose spring constant is 261 N/m.What is the speed of the block when it hits the spring
Assume that water flowing through a pipe with a circular cross section flows most rapidly at the center of the pipe and least rapidly near the pipe walls. find the speed of the water at the center of the pipe
A laser pulse has an energy of 15 J and a beam radius of 2 mm. The pulse duration is 11 ns and the energy density is constant within the pulse. What is the spatial length of the pulse
State the direction as an angle with respect to the +x axis.
A galvanometer with a full-scale sensitivity of 800uA and a coil resistance of 54 ohms is to be used to build an ammeter designed to read 6.0A at full scale
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