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A body of mass 500 g is fastened to one end of a steel wire of length 2 m and area of cross-section 2 mm2. If the breaking stress of he wire is 1.25 × 107N/m2, then the maximum angular velocity with which the body can be rotated in a horizontal circle is?
a large rectangular tub is filled to a depth of 2.60 m with olive oil, which has density 915 kg/m^3. find the force of air pressure on the surface of the oil
A ball is shot from the ground into the air. At a height of 10.60 m, the velocity is observed to be v = (8.60 m/s) i + (6.50 m/s) j
A 10 centimeter long thin glass rod uniformly charged to +10nC and a 10 centimeter thin plastic rod uniformly charged to -10nC are located side by side, 4.0 centimeter apart. Find what are the electric field strengths E1 to E3
A charged belt, 50 centimeter wide, travels at 30 m/s between a source of charge and sphere. Find the surface charge density on the belt
Suppose a monochromic light strikes a grating at normal incidence. The first order diffractions lines appear at the angle 23°, what is the frequency of the light that passes through
In a head-on collision, a car stops in 0.17s from a speed of 30m/s . The driver has a mass of 78kg, What force is applied to the driver by his seat belt during that fraction of a second
After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 49.0. What is the magnitude of the gravitational acceleration on this planet
I once observed a woman on an airplane at night with a camera. As we flew low over Washington DC she was impressed with the view of the city lights in the dark. She stood back in the aisle and tried to take the picture by the window using her flash. ..
A solid (cylindrical) flywheel of mass m and radius r is initally at rest. A force F acts tangentially on its perimeter for a time t. Show that its angular velocity at t = 2Ft/mr . Illustrate what is its angular displacement during that time?
Just before a baseball is hit by a bat, it has a velocity of 30 m/s, 15A??o below the +x axis. After it is hit by the bat, it has a velocity of 60 m/s, 30A??o above the -x axis. If the bat is in contact with the ball for 4 ms, what is the magnitud..
A celebrity holds a press conference, which is televised live. A television viewer hears the sound picked up by a microphone directly in front of the celebrity, determine the maximum distance between the television viewer and the celebrity
A man pulls a 50.0 kg box at constant speed across the floor. What is the value of the normal force
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