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A 13 g bullet traveling 235 m/s penetratesa 2.0 kg block of wood and emerges cleanly at 174 m/s. If the block is stationary on a friction less surface when hit, how fast does it move after the bullet emerges?
A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 14.0cm , giving it a charge of -11.0μC. Find the electric field just outside the paint layer
A 9.0 Kg box of oranges slides from rest down a frictionless incline from a height of 5.0 m. A constant frictional force, introduced at point A, brings the block to rest at point B, 19 m to right of point A. What is the velocity of the box just be..
A magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of the field is changing, so that anemf of 0.69 V and a current of2.8 A are induced in the coil.
You make tea with 0.375 kg of 94.6°C water and let it cool to room temperature (20.0°C) before drinking it. Calculate the entropy change of the water while it cools.
For a simple harmonic oscillator with k= 4.0N/m and A=0.75 m, the time between maximum velocity and maximum acceleration is 2.50s. Find the maximum velocity and maximum acceleration
We are not normally aware of the gravitational or electric force between two ordinary objects. What is the reason in each case? Give an example where we are aware of each one and why.
If a violin string is tuned to a certain note, by how many times must the tension in the string be increased if it is to emit a note of 4 times the original frequency
two cylindrical wires of identical length are madeof copper and aliminum. if they carry the same current and have the
If the area of the crack is 1.3 cm^3, at what rate of flow does the water leave the container
At rest, a car's horn sounds at a frequency of 480 Hz. The horn is sounded while the car is moving down the street. A bicyclist moving in the same direction with one-third the car's speed hears a frequency of 470 Hz. What is the speed of the car?
A motor has coils with a resistance of 26 Ω and operates froma voltage of 240 V. When the motor is operating at its maximumspeed, the back emf is 111V.
An outboard motor for a boat is cooled by lake water at 14.7°C and has a compression ratio of 14.9. Assume that the air is a diatomic gas. Calculate the efficiency of the engine's Otto cycle
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