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At a rock concert, the engineer decides that the music isn't loud enough. He turns up the amplifiers so that the amplitude of the sound, where you're sitting, increases by 90.0%.
(a) By what percentage does the intensity increase?
%
(b) How does the intensity level (in dB) change?
dB
An iron bolt is used to connect two iron plates together. The bolt must withstand shear forces up to about 3150 N. Calculate the minimum diameter for the bolt
Two objects are charged and their centers are separated by 31.6 cm. Object A is charged to 61 nC and object B is charged to 54 nC. What is the magnitude of the electrostatic force between them.
You stand in the earth's magnetic field, directly facing its horizontal component (in other words, facing magnetic south). Compute the outward flux through your body's back surface
An inductor with L = 9.15mH is connected across an ac source that has voltage amplitude 45.5V. Does the source voltage lag or lead the current
Find the use of an NPN common emitter transistor, advantage of direct - coupled amplifier and bandwidth of an amplifier.
A 46 dB sound wave strikes an eardrum whose area is 4.4 × 10-5 m2. How much energy is received by the eardrum per second
Find the magnitude of the acceleration of the particle. What are the x- and y-coordinates of the shell where it explodes,associated to its firing point.
A material has an index of refraction of 2.050. What is the critical angle for internal reflection inside a block
1. daggett turns his living room into a giant turntable but forgets to pin down the furniture. as a result the
A 1000 kg roller coaster starts from rest at height H= 25 m above the bottom of a 14 m diameter loop. What is the downward force of the track on the car
A stone is thrown upward with an initial velocity of 6 m/s. What maximum height will the stone reach
What is the net force exerted on the skier, assume his acceleration is constant.
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