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A microphone having an open-circuit sensitivity of -60 dB referenced to 1 V is used to measure the sound level from the speaker in Prob. 11.37. Determine the voltage output from the microphone.
Prob. 11.37:
A certain loudspeaker produces a sound-pressure level of 90 dB at a distance of 1.0 m from the speaker cone for a power input to the speaker of 1 W. Calculate the ratio of total sound power to electric-power input, assuming all the sound power passes through a 1-m radius hemisphere in front of the speaker.
Make a position-vs.-time graph of that trip.
If 7 J of work are needed to stretch a spring from 12 cm to 15 cm and 13 J are needed to stretch it from 15 cm to 18 cm, what is the natural length L of the spring?
The figure below show a telephone wire hanging between two poles at x = - b and x = b. It takes the shape of a catenary with equation y = c + a Find the length of the wire.
Explain how counting numbers, integers, and rational numbers are used in everyday life. Then, describe a situation in which you used counting numbers, integers, or rational numbers to perform a task or solve a problem.
What is the maximum number of failures that can be experienced on the demonstration test without violating the contractual requirement? (Assuming exponential distribution)
Consider the function f(x) = 7 - 3x2 on the interval [-2, 4]. Find the average or mean slope of the function on this interval, i.e. f(4)- f(-2) 4 - (-2)=?
Assume that the result is a sample size beyond what you can obtain. Use the compromise function to compute alpha and beta for a sample half the size. Indicate the resulting alpha and beta. Present an argument that your study is worth doing with th..
what is the amount of depreciation during the fifth year?
Calculate the area of the sectorABD in terms of angle θ. Take the formulas you got in 2) and 3) and just by looking at the diagram, put the three areas in order of increasing size.
At the beginning of an experiment, a scientist has 208 grams of radioactive goo. After 165 minutes, her sample has decayed to 6.5 grams.
suppose bob bought an suv that originally had tires with a diameter of 26 inches but then replaced them with larger
Is this unusual to find that among 863 patients, there are 19 who experience flu symptoms in a)? Explain.
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