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An outside loudspeaker (considered a small source) emits sound waves with a power output of 80 W.
(a) Find the intensity 9.0 m from the source.
(b) Find the intensity level in decibels at that distance.
(c) At what distance would you experience the sound at the threshold of pain, 120 dB?
A horizontal merry-go-round has a mass of 1000 kg, and is a solid disk of radius 2.00 m. It is started from rest by a constant horizontal force of 50.0 N applied tangentially to the edge of the disk.
q1. two ocean liners each with a mass of 38000 metric tons are moving on parallel courses 92 m apart. what is the
A boy uses a slingshot to launch a pebble straight up into the air. The pebble reaches a height of 24.0 m above the launch point 2.3 seconds later, What was the pebble's initial speed
The rms speed of the molecules in 1.8 of hydrogen gas is 1600 m/s. What is total translational kinetic energy of the gas molecules.
Two adjacent natural frequencies of an organ pipe are found to be 840 Hz and 910 Hz. Calculate the fundamental frequency and length of this pipe
An airplane moves at 120 m/sec to the west with respect to the air. How fast does the airplane move
A student has a stretched string on density u and length L under a tesnion F. A standing wave of frequency f = 4/4 squareroot, Calculate the length of the string
Suppose V max = 120 V for an alternating current power source. What is the rms voltage for the source
A world-class sprinter accelerates to his maximum speed in 4s . He then maintains this speed for the remainder of a 100m race, What is his average acceleration for the entire rac
Determine the magnitude of the butterflys displacement.
An archer shoots an arrow with a velocity of 30 m/s at an angle of 20 degrees with respect to the horizontal. What is the initial speed of the apple
The working substance of an engine is 1.00 mol of diatomic gas. The engine operates in a cycle consisting of three steps, Find the efficiency of this cycle
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