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A train moving at 28.5 m/s passes a platform, sounding a horn with a frequency of 1250 Hertz. Obtain the frequency heard by an observer on platform as the train approaches and as it recedes.
A sinusoidal wave traveling on a string is moving in the positive x-direction. The wave has a wavelength of 3 m, a frequency of 70 Hz, What is the wave function for this wave
A sled traveling at a speed of 5.0 m/s slows to a stop 4.0 m fromthe point where its passenger rolled off. What is the magnitude of the horizontal net force that slows the 110 N sled?
X-rays of wavelength 0.012 nm scatter from a free electron at scattering angle of 45^0. Find the energy and momentum of the recoiled electrons
The suspension system of your 1200 kg car has a natural oscillation frequency of 2:00 Hz without functioning shock absorbers, At what speed are you driving
A snowboarder starts from rest and glides down a hill that is 100m high. Assuming no friction, what is her speed at the bottom of the hill
The membrane that surrounds a certain type of living cell has a surface area of 5.00 10-9 m2 and a thickness of 1 10-8 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 5.
A Football is kicked at 45degrees and travels 82m before hittingthe ground. What is its initial velocity? How long is it in the air?
Three forces in the x-y plane act on a 5.80 kg mass: 15.30 N directed at 59o, 12.20 N directed at 170o, Calculate the direction of the resultant force using the same sign convention as above
the starter motor of a car engine draws a current of 110a from the battery. the copper wire to the motor is 4.40mm in
Discuss the possible changes of whales' songs as a result of temperature, wave speeds, and etc. How could you distinguish the whales' songs from other songs
You are standing on a large sheet of frictionless ice and are holding a large rock. If your mass is 75.0kg and the rock's mass is 14.3kg, what is your speed after you throw the rock
Two cars a and b are travelling in the equal direction with velocities A and B(A>B). While the car a is at a distance behind car b, the drive of car a applies break producing uniform retardation r, there will b no collision while.
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