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Hearing damage may occur when a person is exposed to a sound intensity level of 90.0 dB (relative to the threshold of human hearing) for a period of 9.00 hours. An eardrum has an area of 3.33 x 10-4 m2. How much sound energy is incident on the eardrum during this time?
A boiler is producing methanol vapor at 1 atm using hot oil flowing through a single 1-in. OD x 0.134-in. wall thickness 304 stainless tube as a source of heat.
An infant's pulse rate is measured to be 156 ± 4 beats per minute. What is the percent uncertainty in this measurement? (Note that percent uncertainties should be reported to two significant figures.)
A light beam having a wavelength of 470. nm in air is directed into glycerine (n = 1.47). What is the frequency of the light in the glycerine
Use Equation m
What will be the hang time if the player reaches the same height while jumping 4 feet -
q1. a flight attendant pulls her 66 n flight bag a distance of 381 m along a level airport floor at a constant
what is the highest order of the interference maximum possible for a diffraction grating with 500 lines per millimeter
a capacitor is charged to a potential of 12.0v and is then connected to a voltmeter having an internal resistance of
When you blink your eye, the upper lid goes from rest with your eye open to totally covering your eye in a time of 0.024s. Estimate the distance that the top lid of your eye moves through a blink. What is the acceleration of your eyelid? Assume it to..
The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on a person standing on earth? Give the answer by determining the ratio Fsun/ Fmoon of magnitudes of gravitational forces.
Three charged particles are placed at each of three corners of an equilateral triangle whose sides are of length 2.8 . Two of the particles have a negative charge: = -6.7 and = -13.4 . The remaining particle has a positive charge, = 8.0 . What is ..
The cylinder in the figure has a moveable piston attached to a spring. The cylinder's cross-section area is 10 cm2, it contains 0.0055 mol of gas, and the spring constant is 1500 N/m. At 15oC the spring is neither compressed nor stretched. How far ..
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