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A 50dB sound wave strikes an eardrum whose area is 5.6 x 10-5 m2. How much energy is absorbed by the eardrum per second? Take the threshold of hearing to be Io = 10-12 W/ m2 and give your answer in pico-Joules, where 1pJ =10-12 J
A hockey puck is swung at the end of a very slight 30 cm long string in a horizontal circle. what is the tension force supplied by the string
A 4 kg fish swimming 3 m/s swallows an absent minded 2 kg fish at rest. What is the speed of the large fish instantly after lunch.
A light wave travels from point A to point B in vacuum. hat is the difference between the number of waves between A and B with and without the glass plate in place
Three equal point charges, each with charge 2.00, are placed at the vertices of an equilateral triangle whose sides are of length 0.650. Illustrate what is the electric potential energy of the system?
A hollow, thin-walled sphere of mass 12.0kg and diameter 47.0cm is rotating about an axle through its center. At the time 4.00s , find the angular momentum of the sphere
A popular carnival ride consists of a large, round room that rotates fast enough that any person standing against the wall will be stuck there, even as the floor is dropped away from their feet. What is the room's angular speed in rpm
Find the speed of sound in a thin rod of copper, which has a sheer modulus of 4.5 1010 Pa and a density of 8.90 103 kg/m3
Refer to Interactive Solution 19.25 to review one way in which this problem can be solved, What is the distance of closest approach
safety rules indicate that a ladder placed against a building should noever be further away from the building than 14
A single loop of wire with an area of 0.0900 m2 is in a uniform magnetic field that has an initial value of 3.80 T, is vertical to the plane of the loop, and is decreasing at a constant rate of 0.190 T/s.
question1the elastic energy stored in your tendons can contribute up to 35 of your energy needs when running. sports
A car is traveling at 50.0 mi/h on a horizontal highway. If the coefficient of static friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop
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