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The sound intensity in front of a loudspeaker diaphragm vibrating at 2kHz is 4.3 W/m^2, with an acoustic power output of 0.3W. Calculate the diameter of the diaphragm. in cm
A siren of frequency 3.20kHz moves away from a stationary observer with a speed of 30.5 m/s. If the speed of sound is 335 m/s, the frequency heard by the observer is.
A 0.200 kg block is placed on a vertical spring (k = 5.00x10^3) and pushed downward, compressing the spring 0.100 m. As the block is free, it leaves the spring and continues to travel upward. What height above the point of release would block reac..
A metal sphere with radius r_a is supported on an insulating stand at the center of a hollow, metal spherical shell with radius r_b. There is charge + q on the inner sphere and charge - q on the outer spherical shell. Take potential V to be zero w..
A student (m= 75 kg) falls freely from rest and strikes the ground. throughout the collision with ground, he comes to rest in a time of 0.040 s. the average force exerted on him by the ground is +18 000 N.
A tennis player receives a shot with the ball ( 0.0600kg) traveling horizontally at 50.0 m/s, what is the impulse delivered to the ball by the racket
Determine the efficient spring constant of the molecule
A sound wave traveling at 341m/s is emitted by foghorn of a tugboat. An echo is heard 3.30s later.
n undamped 1.47-kg horizontal spring oscillator has a spring constant of 25.1 N/m, What is the oscillator\'s total mechanical energy as it passes through a position that is 0.651 of the amplitude
What is the approximate radius of Earth? Its mass is 6.0*10^24 kilograms and the acceleration due to gravity at its surface is 9.8 m/s2
A 52-kg pole vaulter running at 13 m/s vaults over the bar. Her speed when she is above the bar is 1.0 m/s, determine her altitude as she crosses the bar
An arrow is fire with a speed of 20m/s at the block of Styrofoam resting on a smooth surface. The arrow penetrates a certain distance into the block before coming to rest relative to it.
find the mass defect (in u) for (a) helium-3 (2He3), which has an atomic mass of 3.016 030 u, and (b) the isotope of hydrogen known as tritium (1T3), which has an atomic mass of 3.016 050 u.
Find out the dividends per share for preferred and common stock for each year. Prepare a brief memo (no more than 120 words) giving the arguments for and against offering this preferred stock. In the memo also briefly mention other methods of obtai..
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