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Earthquakes at fault lines in Earth's crust create seismic waves, which are longitudinal (P-waves) or transverse (S-waves). The P-waves have a speed of about 8 km/s. Estimate the average bulk modulus of Earth's crust given that the density of rock is about 2,500 kg/m3.
A 0.15 kg baseball is hit by a baseball bat. Right before it is hit, the ball's speed is 30 m/s, find the magnitude of the net impulse that is applied to the ball
Two equally charged particles each have a mass of 0.015kg. They are suspended by a light string with a 60 degree angle between them. find the magnitude of the repulsive electric force
A closely packed coil of 500 turns carriers a current of 2.0 A. at what rate must the current change in order to induce an emf of 75V
Two large speakers broadcast the sound of a band tuning up before an outdoor concert. The speed of sound on this particular day is 336.2 m/s. how far must he walk between "loud" spots
In Larry Niven's science-fiction novel Ringworld, a rigid ring of material rotates about a star. The inhabitants of this ring world live on the starlit inner surface of the ring, What is the length of a year on this planet
A small rocket to gather weather data is launched straight up. Several seconds into the flight, its velocity is 120 m/s, What is the net force on the rocket
Find speed of the block at the bottom of the ramp. What is tangential acceleration of a bug on the rim of a 78 rpm record of diameter 7.41 in. if the record moves from rest to its final angular speed in 4 s.
A spring with spring constant 40N/m is attached to the ceiling, and a 5.5-cm-diameter, 1.5kg metal cylinder is attached to its lower end. what length of the cylinder is submerged
When a 0.20-kg block is suspended from a vertically hanging spring, it stretches the spring from its unstrained 0.005 m. find the total mechanical energy of the system at any instant
A block of mass 2.50 kg is pushed 2.00 m along a frictionless horizontal table by a constant 16.0 N force directed 25.0° below the horizontal, Determine the work done by the force of gravity
in order to stop a 1500kg car that is originally moving at 25m/s, and if the car stops over a distance of 50m, what average force must act on the car
In an atwood's machine, one block has a mass of .6kg and the other a mass of .56 kg. What is the direction of the net torque on the pulley
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