Find intensity at spot that is at given distance from sound
Suppose that sound is emitted uniformly in all directions by a public address system. The intensity at a location 25 m away from the sound source is 3.00 10-4 W/m2. What is the intensity at a spot that is 70 m away?
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A 50-N force is the only force a 2-kg crate that starts from rest. At the instant the object has gone 2m the rate at which the force is doing work is: (answer is in Watts)
A pion decays into a muon and a neeutrino. In the rest frame of the pion, the muon always has a speed of .507c. If a beam of pions is moving at 0.600c, what will be the speed of the muons in the lab fram if the muon is emitted traveling in the dir
Suppose that the speed of light in a vacuum were one million times smaller than its actual value: c = 3.00 x 102 m/s. The spring constant of a spring is 640 N/m. Determine how far you would have to compress the spring from its equilibrium length in
A wooden shelter has walls constructed of wooden planks 1.00 cm thick. If the exterior temperature is -20.0°C and the interior is 5.00°C, find the rate of energy loss through a wall that has dimensions 1.85 m by 2.10 m.
The intensity at a location 25 m away from the sound source is 3.00 10-4 W/m2. What is the intensity at a spot that is 70 m away?
In a standing wave pattern the distance between the second and the seventh nodes is 5cm. If the frequency is 300 Hz, find the wavelength and the speed of the wave.
A jetliner has a mass of 1.1 x 105 kg and flies at a speed of 120 m/s. (a) Find the value of its momentum. (b) If the speed of light in a vacuum had a hypothetical value of 150 m/s, what would be the magnitude of the jetliner's momentum?
Suppose you are a management consultant and a client asks you the advantages and disadvantages of using standard costs in cost accounting systems. Prepare your response, listing the advantages and disadvantages of using standard costs.
A positive 2.0-mC charge moves at a speed of 2.9 * 106 m/s perpendicular to both fields. Determine the magnitude and direction of the net force on the charge.
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