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A van de Graaff generator consists of a conducting sphere of radius 20 cm supported on a long insulating tube. A motor-driven belt pumps charge into the sphere at a rate of 0.22 µA.
a. What is the capacitance of the sphere?
b. If leakage is negligible, what is the potential of the sphere after 10 seconds of operation?
c. What is the electric field inside the sphere?
d. What is the electric field at the surface of the sphere?
A golf ball is a struck with a club. The force in the ball varies from zero when contact is made up to maximum value, What is the mass of the golf ball
A particle moving in a straight line with constant accelaration - Find the velocity of particle at the mid point of the path.
In a common but dangerous prank, a chair is pulled away as a person is moving downward to sit on it, What are the magnitudes of the average force acting on the victim from the floor during the collision
A baseball pitcher throws a fastball at a speed of 35m/s. The acceleration occurs as the pitcher holds the ball in his hand and moves it throughout an almost straight-line distance of 3.7 m. estimate the acceleration, assuming that it is constant ..
What is the smallest radius of an unbanked (flat) track around which a bicyclist can travel if her speed is 21 km/h
A ball is thrown straight up in the air at an initial speed of 30 m/s. find the maximum height of the ball
Suppose a ball player throws a ball at an angle of 55 degrees and a speed of 25 m/s. Next to the ball thrower, What is the distance the ball is thrown
The astronaut pushes on the satellite, giving it a speed of 0.25 directly away from the shuttle. Seven-and-a-half seconds later the astronaut comes into contact with shuttle.
A magnifying glass uses a converging lens with a focal length of 15.5 cm. It produces a virtual and upright image that is 3.3 times larger than the object. How far is the object from the lens
The area of the opening can be calculated from pi (3.1416) times the radius squared. If your pupil is open to a radius of 3.5 mm, explain how much light energy passes through in one minute? Give your answer in mJ.
A pipe open only at one end has a fundamental frequency of 282Hz. A second pipe, initially identical to first pipe, is shortened by cutting off a portion of the open end.
A plane sinusoidal electromagnetic wave carries 16.0 J of energy through a small window of area 0.20m2 in 10.0 s. What is the intensity of the wave
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