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A particle with a charge of -60.0 nC is placed at the center of a nonconducting spherical shell of inner radius 20.0 cm and outer radius 23.0 cm. The spherical shell carries charge with a uniform density of -2.35 µC/m3. A proton moves in a circular orbit just outside the spherical shell. Calculate the speed of the proton.
A dentist's drill starts from rest. After 2.70 s of constant angular acceleration it turns at a rate of 2.4 104 rev/min. Find the drills angular acceleration
A transformer for an answering machine takes an ac voltage of amplitude170V as its input and supplies a8.4V amplitude to the answering machine. How many turns does the secondary have
What is the caused by sun wind in upper atmosphere
A man seeking to set a world record want to tow a 109 000 kg airplane along a runway by pulling horizontally on a cable attached to the airplane. The mass of the man is 85 kg, and the coefficient of static friction between his shoes and the runway..
A horizontal rope is tied from a house to a pulley and down to a paint bucket filled with sand. what is the mass of the bucket of sand
Why is it sometimes better to use a small telescope in orbit around the Earth than it is to use a large telescope on a mountaintop?
A 73-kg boy is surfing and catches a wave which gives him an initial speed of 1.6 m/s. How much nonconservative work was done on the boy
A 37.0 kg child runs with a speed of 2.50 m/s tangential to the rim of a stationary merry-go-round, Calculate the initial kinetic energy of the system
How much sound power will strike the eardrum of an airport worker 15.3 m from the aircraft? (Use 1.9 10-2 m as the diameter of the ear.)
A soccer player kicks a ball, giving it an initial velocity of 17.2 m/s in the horizontal direction, How far down the field does the ball travel before landing
A transverse sinusoidal wave on a string has a period T = 36.0 ms and travels in the negative x direction with a speed of 30.0 m/s. At t = 0, What is the maximum transverse speed of the string
A football spends a total of 5 seconds in the air. It reaches a peak height of 30 meters. How long does it take to reach its peak height? The football has the range of 90 yards. What is its horizontal velocity.
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