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Three point charges, -4.9 x 10-9 C, -9.7 x 10-9 C, and +7.1 x 10-9 C, are fixed at different positions on a circle. The total electric potential at the center of the circle is -2200 V. What is the radius of the circle?
In the winter sport of curling, players give a 20kg stone a push across a sheet of ice. How much force does the curler exert on the stone
The meter stick in the drawing can rotate about an axis located at the 20.0-cm mark, Which force, F1 or F2, acts on the meter stick, and what is its magnitude
An incandescent lightbulb draws 0.50 A, while a compact fluorescent with the same light output draws 125 mA. How do their energy-consumption rates compare
Two masses are attached to strings wound around a double pulley as shown. The double pulley has a total mass of 1200g (1.2kg), Calculate the angular acceleration of the double pulley
A 9.22 kg ball, hanging from the ceiling by the light wire 145.00 cm long, is struck in an elastic collision by a 1.20 kg ball moving horizontally at 6.46 m/s just before the collision.
For a movie scene, a 75kg stuntman drops from a tree onto a 55kg sled that is moving on a frozen lake with a velocity of 15m/s toward the shore, What is the speed of the sled after the stuntman is on board
At the moment of release, a baseball player has a horizontal velocity component of 39 meters per second, At what angle was the ball released
A speeder is pulling directly away and increasing his distance from a police car that is moving at 23.0 m/s with respect to the ground. Calculate the speeder's speed with respect to the ground.
A bullet of mass 0.0022 kg initially moving at 503 m/s embeds itself in a large fixed piece of wood and travels 0.71 m before coming to rest. Assume that the acceleration of the bullet is constant.
A 40 kg child sits in a swing suspended with 2.5 m long rope. Use energy conservation to determine the speed the child will have at the bottom of the arc when she is let go
In coming to a stop, a car leaves skid marks 77m long on the highway. Assuming a deceleration of 8m/s2, estimate the speed of the car just before braking.
A fine metal foil separates one end of two pieces of optically flat glass, as in Fig. 24-33. How thick is the foil
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