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A uniform rod, supported and pivoted at its midpoint, but initially at rest, has a mass of 83 g and a length 8 cm. A piece of clay with mass 35 g and velocity 2 m/s hits the very top of the rod, gets stuck and causes the clay-rod system to spin about the pivot point O at the center of the rod in a horizontal plane.
After the collisions the clay-rod system has an angular velocity ω about the pivot. With respect to the pivot point O, what is the magnitude of the initial angular momen-tum Li of the clay-rod system?
The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on a person standing on earth? Give the answer by determining the ratio Fsun/ Fmoon of magnitudes of gravitational forces.
An oil drop carries one excess electron and weighs 9.2 10-15 N. What electric field strength is necessary to suspend drop so it is motionless.
For a double-slit experiment with slit spacing 0.2 and wavelength 600, at what angular position is the path difference equal to one-fourth the wavelength.
Earth has a net charge that produces an electric field of approximately 150 N/C downward at its surface. (a) What is the magnitude and sign of the excess charge.
A train is traveling down a straight track at 29 m/s when the engineer applies the brakes, resulting in an acceleration of 1.0 m/s2 as long as the train is in motion. How far does the train move during a 58-s time interval starting at the instant ..
Two charged bodies exert a force of 0.790N on each other. If they are moved so that they are one-fourth as far apart, what force is exerted.
Suppose that the air bubble is always in thermal equilibrium with the surrounding water.
Two carts on a frictionless air track are made to travel toward each other. As they collide they stick together. if the cart on the left has a mass of 250 grams and is moving at 0.2 meters per second to the right.
A 0.410 kg pendulum bob passes through the lowest part of its path at a speed of 3.13 m/s. What is the tension in the pendulum cable at this point if the pendulum is 76.2 cm long.
A paperweight is made of a solid glass hemisphere with index of refraction 1.50. The radius of the circular cross section is 4 cm. The hemisphere is placed on its flat surface, with the centre directly over the 2.5 mm long line drawn on a sheet of ..
Even as exploring a sunken ocean liner, principal researcher found the absolute pressure on the robot observation submarine at the level of the ship to be about 413 atmospheres. The density of seawater is 1025kg/m^3.
A toy car runs off the edge of the table that is 1.6405 m high. The car lands 0.3311 m from the base of the table how long does it take for the car to fall? The acceleration by reason of gravity is 9.80 m/s2.
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