What frequency does your friend hear
Friend of yours is singing loudly a single note at 400 Hz while driving toward you at 25.0 m/s on a day when the speed of sound is 340 m/s. What frequency does your friend hear if your friend heard if you suddenly start singing at 500 Hz?
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An airplane moves 402 m/s as it travels around a vertical circular loop which has a radius of 2.8 km. What is the magnitude of the normal force on the 200 kg pilot of this plane at the bottom of this loop? The acceleration of gravity is 9.8 m/s2 .
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A sled weighs 100N. it is held in place on a frictionless 20 degree slope by a rope attached to a take at the top; the rope is parallel to the slope. what is the normal force acting on the sled?
If the 4 kg mass slides on a horizontal frictionless surface, what is the speed of the mass 4 kg when it has fallen a distance 0.1 m downward from its rest poisiton?
A damped mass-spring system oscillates at 265 Hz. The time constant of the system is 2.0 s. At t = 0, the amplitude of oscillation is 6.1 cm and the energy of the oscillating system is then 61 J.
Coherent light with wavelength 599 passes through two very narrow slits, and the interference pattern is observed on a screen a distance of 3.00 from the slits. The first-order bright fringe is a distance of 4.84 from the center of the central br
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