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1) Suppose the sound pressure level of each of three individual noise sources is measured at a point such that with each source running individually, the sound pressure is as follows:
Source 1 - 87 dB
Source 2 - 85 dB
Source 3 - 89 dB
What is the sound pressure level with all three running? (Show your work).
2) A compressor in a mechanical room was measured at 5 feet from the source to have a sound pressure level of 90 dB. What would the sound pressure level be at 10 feet from the source?
3)A compressor in a mechanical room was measured at 5 feet from the source to have a sound pressure level of 90 dB. If a second identical compressor was placed immediately next to the first, what would the resulting sound pressure level measurement at 5 feet be?
4)If an employee is exposed to continuous sound levels for 2 hours at 95 dB and is then exposed to sound levels below 65 dB for the rest of the 8 hour day, what is the employee's 8 hour TWA in dBA using OSHA's calculations? Does this employee exceed OSHA's PEL? Does this employee need to be in a hearing conservation program?
\(\sum_{}^{}A_{n}sin(nk_{1}z); n = 1, 3, 5.....\) Formula 1 Formula 2 Prove the following two statements using a method that makes use of the normal modes of a continuous string with appropriate boundary conditions, and is equivalent to the the Fo..
An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. What is the work done by the force
A 1500 kg truck, cruising at 20.0 m/s, approaches a 0.450 km long hill inclined at 5.74?. what average force was applied to the drive wheels
What are (a) the x component,(b) the y component, and(c) the z component of = - + if = 1.1 + 1.7 - 5.9, = -8.4 + 4.5 + 1.9, and = 8.9 + 7.8 + 7.1. (d) Calculate the angle between and the positive z axis.
A solenoid of length 5.6 cm and diameter 0.88 cm is wound with 167 turns per cm. The current is decreasing at a rate of 37.4 A/s. What is the induced emf in the entire solenoid
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when a current flows in an aluminum wire of diameter 4.35 mm the drift speed of the conduction electrons is 2.57 times
A learner (m = 66 kilogram) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.04 second. Estimate from what height did the student fall
The mass of the moon is 7.36 × 1022 kg and its distance to the Earth is 3.84×108m. What is the gravitational force of the moon on the earth
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Two charged particles move in the similar direction with respect to the same magnetic field. Obtain the ratio of the magnitudes of the charges
A film is coated on the surface of a lens maximizing transmission at ? = 600 nm. What is the thickness of the film
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