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At a rock concert, a dBmeter registered 126dB when placed 2.3m in front of a loudspeaker on the stage.
1) What was the power output of the speaker, assuming uniform spherical spreading of the sound and neglecting absorption in the air?
2) How far away would the sound level be a somewhat reasonable 92dB?
A wheel has eight spokes and a radius of 33.0 . It is mounted on a fixed axle and is spinning at 2.80 . You want to shoot a 38.0 long arrow through the wheel, parallel to this axle, without hitting any of the spokes. Assume that the arrow and the ..
A particle leaves the origin with an initial velocity v = (1.00 ) m/s and a constant acceleration a = (-1.00 - 0.700 ) m/s^2. What is the position vector of the particle at this time
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the following frequency distribution analyzes the scores on a test. find the class boundaries of scores interval
A physics lab demonstrates the principles of simple harmonic motion (SHM) by using a spring affixed to a horizontal support, calculate the spring constant
A dog pulls on a pillow with a force of 2.2 N at the angle of 40° above the horizontal. Find the x and y components of the force.
Thunder is heard 4.0 sec after the flash of lightning is observed. If the outside temperature is 15 degrees celsius, how far away was the lightning bolt
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what is the minimum acceleration necessary for the plane to take flight.
It takes 2.30ms for the current in an LR circuit to increase from zero to 0.71 its maximum value, Determine the time constant of the circuit
A Dodge Caravan has a speed of 50 mph and an acceleration of 2 mph second. Which car has the higher speed after 10 seconds have elapsed
water flows horizontally through a garden hose of radius 1.0cm at speed of 1.4 m/s. what is the gauge pressure of the water inside the hose
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