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A person wears a hearing aid that uniformly increases the sound level of all audible frequencies of sound by 35.7 dB. The hearing aid picks up sound having a frequency of 250 Hz at an intensity of 2.70 10-11 W/m2. What is the intensity delivered to the eardrum?
Two tugboats pull a disabled supertanker. Each tug exerts a constant forace of 1.55*10^6n, What is the toal work they do on the supertanker
An x-ray tube accelerates electrons from rest at 5.0×10 14th m/s(squared) power through a distance of 20cm . (Such high accelerations are possible because electrons are extremely light.) Find the electrons'velocity after this acceleration. Find th..
The magnetic field in an electromagnetic wave has a peak value given by B = 5.0?T. For this wave, find the peak electric field strength
A ball is thrown at an initial velocity of 105 mph upward at a roof. The ball is thrown a distance of 100 ft from the building. The building is 525 ft tall. Will the ball reach the roof
A powerful motorcycle can produce an acceleration of 3.00 m/s2 while traveling at 90.0 km/h. What force does the motorcycle exert backward on the ground
An express train passes through a station. It enters with an initial velocity of 22.0 m/s and decelerates at a rate of 0.150 m/s2 as it goes through. How fast is it going when the nose leaves the station
An aircraft with a mass of 956 kg accelerates from 0 to 92 m/s in 6.7 seconds, What is the kinetic energy of the aircraft when the aircraft launches
Cables that are used to support structures sometimes need to be tested in place to ensure that they are in good shape and at the proper tension. One way to do this is to send waves through them and examine the speed and other properties of the wav..
A car, starting from rest, accelerates for 5 seconds until its wheels are moving with an angular velocity of 1000 rad/s. What is the angular acceleration of the wheels?A car, starting from rest, accelerates for 5 seconds until its wheels are moving w..
Two boats start together and race across a 46 km wide lake and back. Boat A goes across at 44 km/h and returns at 48 km/h. Boat B goes across at 27 km/h, and its crew, realizing how far behind it is getting, returns at 69 km/h. Turnaround times are n..
An isolated conductor of arbitrary shape has a net charge of +8.6 x 10- 6 C. Inside the conductor is a cavity within which is a point charge q = +3.8 x 10-6 C. determine the charge on the cavity wall
After 6 L of solvent have passed through the column, the yellow band still has not traveled down the column appreciably. What should be done to make this experiment work better
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