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A spring is stretched between two posts. When a pulse is produced at one end of the spring, it makes 4 back-and-forth trips along the spring in 3.4 s. If the pulse has a propagation speed of 12 m/s, how far apart are the posts?
A sound wave generated by a source of frequency 440 Hz is moving through 25 oC air. What is the wavelength of the sound wave inside the steel
An x-ray beam (25 MeV) strikes a proton at rest and scatters the x-rays through an angle of 100 degrees. What is the wavelength of the scattered x-rays
Current & magnetic induction in the electrical circuits.
A laboratory electromagnet produces a magnetic field of magnitude 1.53 T. A proton moves through this field with a speed of 5.42 106 m/s. What is the magnitude of the maximum acceleration of the proton
Suppose you take a 2.0×102? resistor and a 0.40H inductor and make a series circuit with a voltage source that has voltage amplitude 30V, What is the current amplitude
A particle undergoes three successive displacements in a plane, as follows: 3.50 m southwest, 4.50 m east, and 6.00 m in a direction 60.0° north of east. How do you find the components of the first displacement
A 57 gram tennis ball is served at 45 meters per second. If the ball started from rest what impulse was applied to the ball by the racket
Two people are carrying a uniform wooden board that is 3.00 m long and weights 160 N. at what point does the other person lift
A pipe is horizontal and carries oil that has a viscosity of 0.15 Pa · s. The volume flow rate of the oil is 5.8 10-5 m3/s. What is the absolute pressure at the input end
A cyclist hits the brakes and decelerates. His wheels were spinning at 175 rev/min initially and 40 rev/min after 5 s of deceleration. Compute the average angular acceleration (in rad/s2) of his wheel during this 5 s period
A 2 kg ball has been thrown vertically upward. If we ignore the air resistance, what are the direction and size of the net force acting on the ball while it is traveling upward?
An iron cube with a volume of 8.00cm^3 is submerged in ethyl alcohol, which has a density of 0.806g/cm^3. What is the volume of ethyl alcohol displaced
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