Concept explainers
In Exercises 79-82, use the following information. The relationship between
the number of decibels
Find the difference in loudness between an average office with an intensity of
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- In Exercises 79-82, use the following information. The relationship between the number of decibels and the intensity of a sound I (in watts per square meter) is =10logI1012. Find the difference in loudness between a vacuum cleaner with an intensity of 104 watt per square meter and rustling leaves with an intensity of 1011 watt per square meter.arrow_forwardThe resistance of a copper wire carrying an electrical current is directly proportional to its length and inversely proportional to its cross-sectional area. A copper wire with a diameter of 0.0126inch has a resistance of 64.9ohms per thousand feet. What length of 0.0201-inch-diameter copper wire will produce a resistance of 33.5ohms?arrow_forwardThe function f(x)=ex is called the___________ Exponential function. The number eis approximately equal to________.arrow_forward
- What is the decibel level of a train whistle with intensity 103 watts per square inch?arrow_forwardThe formula for measuring sound intensity indecibels D is defined by the equation D=10log (II0), where I is the intensity of the sound in wattsper square meter and I0=1012 is the lowest level ofsound that the average person can hear. How manydecibels are emitted from a largeorchestra with asound intensity of 6.3103 watts per square meter?arrow_forwardThe formula for measuring sound intensityin decibels D is defined by the equation D=10log(II0) where I is the intensity of the sound in watts persquare meter and I0=1012 is the lowest level of sound that the average person can hear. How manydecibels are emitted from a rock concert with a sound intensity of 4.7101 watts per square meter?arrow_forward
- Estimate the age of a newly discovered fossil for which the ratio of carbon-14 to carbon-12 is R=1/1014.arrow_forwardHow can the logarithmic equation logbx=y besolved for x using the properties of exponents?arrow_forwardWhat is the decibel level of one of the new quiet dishwashers with intensity 107 watts per square inch?arrow_forward
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