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A dog running in the +y-direction at 6.9 m/s hears its owner call from behind, and 3.1 s later it's running at the same speed in the opposite direction.
A) Compute the dog's change in velocity.
B) Compute its average acceleration.
What is the wavelength of the sound because perceived by a person standing on at the crossing when the train is approaching? What is the wavelength of the sound as perceived by a person standing on at the crossing when the train is leaving?
The velocity of the car at the end of the fifteen-second period is +20.6 m/s. The ratio of the average acceleration values is a1/a2 = 1.50. Find out the velocity of the car at the end of the initial ten-second interval.
A 50.40 kg keg of beer slides upright down a 3.05 m long plank leading from the back of a truck 1.16 m high to the ground. Determine the amount of work done on the keg by gravity
The inner edge of a race track is in the form of a rectangle with two semicircular ends on the shorter sides. The rectangle is 82.0 m wide and 137.0 m long. The race track is 5.50 m wide.
In designing rotating space stations to provide for artificial-gravity environments, one of the constraints that must be considered is motion sickness. Studies have shown that the negative effects of motion sickness begin to appear when the rotati..
A plane lands on a runway with a speed of 135 m/s, moving east, and it slows to a stop in 15.0 s. What is the magnitude and direction of the plane's average acceleration during this time interval?
question a resonant circuit in a radio receiver is tuned to a certain station when the inductor has a value of .250 h
The Rydberg constant is 1.096776 x 10^7 m^-1, What is the wavelength of the first Balmer line (j=2, k=3) for helium (z=2)
Compute the force of gravity between a newborn baby (mass = 4 kg) and the planet Mars (mass = 6.4 x10^23 kg), when Mars is at its position closest to Earth (distance = 8.0 x10^10 m).
A swimmer bounces straight up from a diving board and falls feet first into a pool. She starts with a velocity of 4.00 m/s, and her takeoff point is 1.50 m above the pool. What is her velocity when her feet hit the water
Two parallel slits are illuminated with light composed of two wavelengths, one of which is 645 nm. On a viewing screen, the light whose wavelength is recognized produces its third dark fringe at the same place where the light whose wavelength is unk..
A 130 g ball with speed 7.5 m/s strikes a wall perpendicularly and rebounds in the opposite direction with the same speed. find the magnitudes of the average force on the wall
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