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Two loudspeakers on a concert stage are vibrating in phase. A listener is 57.5 m from the left speaker and 28.5 m from the right one. The listener can respond to all frequencies from 20 to 20 000 Hz, and the speed of sound is 343 m/s. What are the two lowest frequencies that can be heard noisily due to constructive interference?
a violin string is stretched between the nut and the bridge which are two fixed points on the violin a distance of 0.35
Some bacteria are propelled by biological motors that spin hair-like flagella. How long does it take the motor to make one revolution
An ac generator has a circular coil of 338 turns and diameter 0.200 m which rotates about an axis in the plane of the coil, What is the peak emf (in V) generated across the generator coil
on a hot day a house is kept cool by an air conditioner. The outside temperature is 32 degrees celsius and the inside temperature is 21 degree celsius. what is the mechanical power that it requires to hold the inside temperature constant
A spherical mirror is to be used to form ona screen 5.00m from the object, an image five times the size of the object. Describe the type of mirror required.
A man strikes a long aluminum rod at one end. Another man, at the other end with his ear close to the rod, How long is the rod
A loudspeaker on a homecoming float - mounted on a pole -- is stuck playing at an annoying 210 Hz tone, What is the intensity of the signal at this point, What is the power of the speaker
A standing wave on a tight string experiment is set up in thelaboratory. The string is stretched between two posts that are1.5 m apart. What is the wave speed of the standing wave
Blocks with masses of 3.0kg, 8.0kg and 9.0kg are lined up in a rowon a frictionless table. All three are pushed forward by a12N force applied to the 3.0kg block.
A 59kg woman trips while walking down the street. She stumbles forward and falls onto her outstretched right hand. At the instant her hand contacts the ground her whole body is moving downward at a velocity of 9m/s and has a downward acceleration ..
a small pumpkin is launched from a very versatile catapult at a variety of speeds and angles. rank each of the
Three point charges areplaced on the x-axis. Charge 1 is located at x = a and has a chargeof +5q, charge 2 is at x = 3a and has a charge of +3q, charge 3 is at x = 5a andhas a charge of +5q. A fourth charge is located on the y-axis at (0,a) and ha..
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