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The distance to a point source is decreased with a factor of three. Suppose that the sound is emitted by the source uniformly in all directions.
1) By what additive amount does the intensity level increase?
2) By what multiplicative factor does the intensity increase?
Decide about the validity of Ampere's Law. Ampere's Law is valid.
A mountaineer in the Rockiesmeasures the air pressure to be 10% below that at sea level. What is the pressure at the deepest point of the lake
If you move towards a pipe at a speed of 3.3m/s, what frequency will you hear from this organ pipe? speed of sound is 330m/s
question1three identical 3.60 masses are hung by three identical springs. each spring has a force constant of 4.90 and
A flat circular coil with 171 turns, a radius of 5.85E-2 m, and aresistance of 0.373 Ω is exposed to an external magnetic fieldthat is directed perpendicular to the plane of the coil.
A golf ball strikes a hard, smooth floor at an angle of θ = 31.6°, rebounds at the same angle. The mass of the ball is 0.043 kg, and its speed is 45m/s just before and after striking the floor. What is the magnitude of impulse applied to the golf bal..
What fraction of the power radiated by the sun is intercepted by the planet Neptune? The radius of Mercury is 2.48 107 m
A flat coil of wire consisting of 20 turns, each with an area of 50 cm2, is positioned perpendicularly to a uniform magnetic field that increases its magnitude at a constant rate from 2.0 T to 6.0 T in 2.0 s. If the coil has a total resistance of ..
A doppler blood flow unit emits ultrasound at 5.0 MHz. What is the frequency shift of the ultrasound reflected form blood moving in an artery at a speed of 0.20 m/s?
A swimmer at the bottom of a pool 3m deep looks up and sees a circle of light. If the index of refraction of the water in the pool is 1.33, find the radius of the circle.
If F(r) is the force on an object as a function of of radius r, show that the "tidal" force on an object of lenght delta r is delta F= (dF/dr)delta r
a 4.64 kg block is on a plane inclined at 18.5 degrees with respects to the horizontal. How many forces are acting on the block
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