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A 0.005 kg. bullet is fired at 300 m/s east into a 10 kg. block of wood at rest. If the bullet sticks into the wood, what is the velocity of the wood bullet system? Draw a diagram of the same problem above. if the bullet passes through the wood and continues at 100 m/s east, what is the velocity of the block of wood?
1. an air puck bounces back and forth between two parallel walls always traveling perpendicular to the walls. each time
A penny has a mass of 2.5 and is 1.5 thick; a nickel has a mass of 5.7 and is 1.9 thick. how far above the tabletop is the center of gravity of the stack
A child sit down in a seat on a Ferris wheel. Suppose the wheel has a radius of 70m, and that when the ride begins, what angle has the child rotated through
Astronauts use a centrifuge to simulate the acceleration of a rocket launch. How many g's of acceleration does the astronaut experience when the device is rotating at the top speed? Each 9.80 m/s2 of acceleration is 1 g
A baseball outfielder throws a 0.150 kgbaseball at a speed of 45.0 m/s and aninitial angle of 31.0°. What is the kinetic energy of the baseball atthe highest point of its trajectory?
A charged conducting sphere of radius 18 cm has 1012 electrons removed from its surface. What is the surface charge density of the sphere
For a damped simple harmonic oscillator, the block has a mass of 2.2 kg and the spring constant is 13 N/m. The damping force is given by -b(dx/dt), How many oscillations are made by the block in this time
Consider a 9.5-mm-diameter wire made from copper (mass density 8.9 g/cc, resistivity 1.7E-8 ohm-m). What is the electric field (in V/m) in the wire
The nucleus 124 55 Cs has a half-life of 30.8 s and a molar mass of 124 g. What is the initial activity (decay rate) of the sample
For a very simple model, consider a solid iron sphere 2.00 cm in radius. Assume the temperature is always uniform throughout its volume. Find the energy of one photon
Electric breakdown (sparks) occur in air if the electric field reaches 3 × 106 N/C. How far must a free electron move under the influence of the above electric field
question what is the pressure in atmospheres on the body of a diver if he is 34 ft below the surface of the water when
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