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He area of a typical eardrum is about 5.0 multiplied by 10-5m2.
a) Compute the sound power incident on an eardrum at the threshold of pain.
b) Compute the sound power (the energy per second) incident on an eardrum at the threshold of hearing.
A loud speaker diaphragm is producing a sound for 2.5s by moving back and forth in simple harmonic motion. How many times does the diaphragm move back and forth
A roller-coaster car has a mass of 500kg when fully loaded by passengers. The car passes over a hill of radius 15 m. At the top of the hill, the car has a speed of 8.0 m/s. what is the force of the track on the car at the hill?
A satellite orbits at a distance from the Earth's center of about 7.20 Earth radii, What distance (in meters) does the satellite travel in one day
A 150 g Copper bowl contains 220 g of water, at an initial temperature T1. A 300 g Copper cylinder at 7000 C is dropped into the water, How much energy is transferred to the bowl
A pot containing 730 g of water is placed on the stove and is slowly heated from 29°C to 86°C. Calculate the change of entropy of the water
A 6.0 m long, 12 kg ladder rests against a smooth vertical wall with bottom of the ladder 3.0 m from the wall. What is the force the wall exerts on the ladder
A wire is moving perpendicularly through a magnetic field of strength 0.100 T with speed 60.0 m/s. what is the length of the wire
a physics student swings a pail of water in a vertical circle 1.0 m in radius at a constant speed. if the water is not
An automobile's wheels are locked as it slides to a stop from an initial speed of 30.0 m/s. how long does it take the car to stop
A penny of mass 3.1g rests on a small 20g block supported by a spinning disk. The coefficients of friction between the block and disk are 0.75 (static) and 0.64 (kinetic).
A 53-kg woman contestant on a reality television show is at rest at thesouth end of a horizontal 149-kgraft that is floating in crocodile-infested waters. She and theraft are initially at rest. She needs to jump from the raft to aplatform that is ..
Consider an alternating current of the form i(t) sin(2pit), where t is the time elapsed measured in seconds. (a) at what times is the magnitude of the current largest? (b) if this current were applied to a resistor, at what times would the magnitude ..
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