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A block of mass 0.78 kg is suspended by a string which is wrapped so that it is at a radius of 0.069 m from the center of a pulley. The moment of inertia of the pulley is 3.90×10-3 kg·m2. There is friction as the pulley turns. The block starts from rest, and its speed after it has traveled downwards a distance of D= 0.79 m, is 1.964 m/s. Calculate the amount of energy dissipated up to that point.
After a 0.805 nm x-ray photon scatters from a free electron, the electron recoils with a speed equal to 1.32E+6 m/s. find the Compton shift in the photon's wavelength
The tension in a copper wire of length 0.5 m with two ends fixed is 200 N. What is the tensile stress if the cross sectional area is 4.0 mm^2
Two cars with equal mass collide head on. One car is going 18 mph. That car is push backward about 38 feet. What is the speed of other vehicle.
What must the charge (sign and magnitude) of a 1.49-g particle be for it to remain stationary when placed in a downward-directed electric field of magnitude 660N/C?
A cube of mass m = 7.55 kg is placed on an inclined plane of mass M = 12.67 kg, which makes an angle a = 52.40° with the horizontal. What is the normal force on the inclined plane from the table underneath it
In the deep ocean, a water wave with wavelength 95 m travels at 12 m/s. What will be the vertical position of the boat
A narrow beam of light with wavelengths from 450 nm to 700 nm is incident perpendicular to one face of a 40.00 degreee prism made of crown glass
A 720 nm light bean in air hits the flat surface of a certain plastic and the bean is split into a reflected ray and a refracted ray. what is the index of refraction of the plastic
a man walks westward on ship with a speed of 4km/hr. the ships propeller drives it 15km/hr south. what is the actual speed of the man relative to earth
A single circular loop of wire is placed inside a long solenoid with its plane perpendicular to the axis of the solenoid. What is the induced emf in the small loop
A disk of mass M and radius R rotates around the z axis with angular velocity wI. What is the ratio of the initial to the final kinetic energies of the two-disk system
A 76.2-kg skier rides a 2520-m-long lift to the top of a mountain. find the change in the skier's gravitational potential energy
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