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A listener is standing in front of two speakers that are producing sound of the same frequency and amplitude, except that they are vibrating out of phase. Initially, the distance among the listener and each speaker is the same (see the drawing). As the listener moves sideways, the sound intensity gradually increases. When the distance x in the drawing is 0.98 m, the change reaches the maximum amount (from soft to loud). Using the data shown in the drawing and 343 m/s for the speed of sound, decide the frequency of the sound coming from the speakers.
A nuclear power plant has an electrical power output of 900 MW and operates with an efficiency of 32%. what is the rise in temperature of the flowing water
satellite with an orbital period of exactly 24.0 h is always positioned over the same spot on earth. this is known as a
Two point charges totaling 7.50 µC exert a repulsive force of 0.250 N on one another when separated by 0.619 m. What is the charge on each if the force is attractive
q1. the loaded cab of an elevator has a mass of 3.0 x 103 kg and moves 221 m up the shaft in 23 s at constant speed. at
A spring-loaded pellet gun is designed to fire 2.50 g projectiles horizontally at a speed of 50.7 m/s. What maximum force is required to load the gun
A cork on the surface of a pond bobs up and down two times per second on ripples having a wavelength of8.20cm. If the cork is10.5m from shore, how long does it take a ripple passing the cork to reach the shore?
A transformer is to be used to provide powerfor a computer disk drive that needs 6.4 V (rms) instead of the 120V (rms) from the wall outlet. Find the number of turns in the secondary
how much work is required to turn an electric dipole 180deg in a uniform electric field of magnitude e 42.0 nc if p
Transverse waves on a string have wave speed , amplitude , and wavelength . The waves travel in the -x direction, andat the end of the string has its maximum upwarddisplacement. Find the frequency of these waves.Find the wave number of these waves..
The system is released from rest, and the string moves without slipping over pulley. If the larger mass is traveling at a velocity of 2.25 m/s when it has dropped 1m, how much mechanical energy was lost due to friction in the pulley's axle.
An athlete starts at point and runs at a constant speed of 6.20 around a round track 250 in diameter, Find the component of this runner's average acceleration between points
A 4.3-m long plank with a weight of 164 N is place on a dock with 1.4 m of its length extended over the water. How far from the edge of the dock can the boy move until the plank is just on the verge of tipping
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