Physics, 13.11.2019 22:31 eylinglez3ovm16v
To learn the properties of logarithms and how to manipulate them when solving sound problems. the intensity of sound is the power of the sound waves divided by the area on which they are incident. intensity is measured in watts per square meter, or \rm w/m^2.the human ear can detect a remarkable range of sound intensities. the quietest sound that we can hear has an intensity of 10^{-12}\; \rm w/m^2, and we begin to feel pain when the intensity reaches 1 \rm w/m^2 . since the intensities that matter to people in everyday life cover a range of 12 orders of magnitude, intensities are usually converted to a logarithmic scale called the sound intensity level beta, which is measured in decibels (\rm db). for a given sound intensity i, beta is found from the equation\beta=(10\; {\rm db})\log\left( \frac {i}{i_0} \right),where i_0=1.0\times 10^{-12}\; {\rm w/m^2}.use this technique to find a formula for the intensity i of a sound, in terms of the sound level beta and the reference intensity i_0. there will be a quantity (10 {\rm db}) involved in your calculations. when you enter your answer, leave off the unit \rm db. express your answer in terms of beta and i_0.
Answers: 3
Physics, 21.06.2019 17:30, Xavier2712
Abatter hits the baseball a with an initial velocity of v0 = 110 ft/sec directly toward fielder b at an angle of 23° to the horizontal; the initial position of the ball is 2.2 ft above ground level. fielder b requires 0.44 sec to judge where the ball should be caught and begins moving to that position with constant speed. because of great experience, fielder b chooses his running speed so that he arrives at the “catch position” simultaneously with the baseball. the catch position is the field location at which the ball altitude is 8.4 ft. determine the velocity of the ball relative to the fielder at the instant the catch is made.
Answers: 1
Physics, 22.06.2019 06:00, quetzaliescalona
A1,700kg car is being used to give a 1,400kg car a push start by exerting a force of 140n the impulse on the smaller car during the 30.0s of contact is +670kg*m/s. what is the impulse of the smaller car on the larger car? -814 kg*m/s 0kg *m/s -670kg*m/s -550kg*m/s
Answers: 1
To learn the properties of logarithms and how to manipulate them when solving sound problems. the in...
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