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A charged material causes the deflection of a positively charged electroscope to increase. Does the charged material have an excess or deficiency of electrons? Explain.
A ruby laser emits an intense pulse of light that lasts a mere 10 ns. The light has a wavelength of 690 nm, and each pulse has an energy of 400 mJ. How many photons are emitted in each pulse
A 30 gram bullet initially traveling at 500 m/s penetrates 12 cm into a wooden block. Use Work Energy theorem and find the average force it exerts on the wooden block
A laser of 750 nm is shown through a grating having 5,000 lines per cm. What is the angle to the first order spots
If the coefficient of static friction is 0.500, what minimum force magnitude is required from the rope to start the crate moving
A 20-N block lifted straight upward by a hand applying a force of 20N has an initial kinetic energy of 16J. What is the block's final kinetic energy
A block whose weight is 41.0 N rests on a horizontal table. A horizontal force of 36 N is applied to the block, what will be the block's acceleration? (If not, enter 0.)
A bottle of saline solution (with a specific gravity of 1.02) is attached to a 1.2 m long piece of tubing with a 1.0 cm inner diameter. If the tubing is held vertically, filled with saline, and clamped at the bottom, (a) what is the gauge pressure at..
Gillian buys a pendulum clock at a discount store and discovers when she gets it home that it loses minutes each day.
a the star zog has a mass of 1.57 e30 kg. calculate the angle by which light from a distant star is deflected at a
A bucket of water with a mass of 2kg is attached to a rope that is wound around a cylinder. The cylinder has a mass of 3 kg and is mounted horizontally on frictionless hearings. The bucket is released from rest.
A block with a mass of 7.32kg is on an incline plane that makes an angle 37.5o with respect to the horizon. what is the coefficient of kinetic friction
The string will break if its tension exceeds 50-{rm N}. The stone is whirled in a horizontal circle on a frictionless tabletop; the other end of the string remains fixed. Find out the maximum speed the stone can attain without breaking the string.
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