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The threshold of hearing in air corresponds to a frequency of 1000 Hz and an intensity of about 7.4 × 10^?13 W/m2. When someone under water hears such sound, what is the corresponding maximum displacement? The density of water is 1000 kg/m3 and the speed of sound in water is 1493 m/s. Answer in units of m
One mole of ideal monatomic gas undergoes the cycle, consisting of an isothermal process AB at temperature 400 K, an isobaric process BC, Find the work done for the entire cycle
In a classroom demonstration, a 79.2-kg physics professor lies on a "bed of nails." what is the average pressure at each contact
Assume that a binary star system consists of two stars of equal mass. They are observed to be separated by 310 million kilometres and take 4.0 Earth years to orbit about the point midway between them.
If the proton is fired at a speed of 3.0×107m/s , what is its closest approach to the surface of the nucleus? Assume the nucleus remains at rest
An ac generator supplies a peak (not rms) voltage of 150 V at 60.0 Hz. The generator is connected in series with a 35-mH inductor, a 45-µF capacitor and an 85-? resistor. What is the power factor for this circuit
A coin rests 14.60 cm from the center of turntable. The coefficient of static friction between the coin and turntable surface is 0.350. The turntable starts from rest at t = 0 and rotates with the constant angular acceleration of 0.8400 rad/s2.
A simple harmonic oscillator with m = 0.740kg and total energy E = 125J has amplitude 1.65m, Find the maximum acceleration
A sinusoidal wave on a string is described by the wave function y = 0.10 sin (0.85x ? 35t) where x and y are in meters and t is in seconds. Determine the power transmitted by the wave
A heat engine with an efficiency of 20.0% performs 2500 J of work. How much heat is discharged to the lower temperature reservoir
A wheel rotates with a constant angular acceleration of 3.10 rad/s2. Assume the angular speed of the wheel is 1.55 rad/s at ti = 0. a) Find the angle through which the wheel rotates between t = 2.00 s and t = 3.10 s. _____rad (b) Find the angular spe..
The motor of a fan turns a small wheel of radius rm = 2.23 cm. This wheel turns a belt, which is attached to a wheel of radius rf = 3.07 cm that is mounted to the axle of the fan blades. Measured from the center of this axle, the tip of the fan bl..
A juggler throws a ball straight up into the air and it takes 4.20 seconds to reach its peak. How many seconds will it take after that to fall back into his hand? Assume he throws and catches the ball at the same height.
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