(2) John Smith experiences an 8-hour noise dose of 120 by spending one hours in Room #1 with a known noise level of100 dBA and another seven hours in Room #2 with an unknown noise level.(Please keep two decimal places)a) Based on the calculation of 120 noise dose, what is the time permitted in Room #2 with this unknown noise level?hrBy using computational formula, what is the corresponding noise level in Room #2?b) What should the maximum noise level be in Room #2 for John Smith to remain within OSHA compliance?dBAAlso, what is the time permitted in Room #2 with this noise level?hrdBA

Introduction: Noise dose is a measure of the total amount of noise energy that a person is exposed…

Answered: (2) John Smith experiences an 8-hour…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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A Chinese patrol ship was spotted 150 kilometers north of a Philippine fishing boat at 6:00 a.m. The patrol ship is sailing south at 45 kilometers per hour, while the fishing boat is sailing east at 30 kilometers per hour, returning to the nearest Philippine island. At 9:00 a.m., how quickly (in kilometers per hour) is the distance between the patrol ship and the fishing boat changing? (Up to two decimal places)
1. An ambulance is called to the scene of an accident 4 kilometres away from the ambulance station. The distance, in kilometres, that the ambulance has traveled to the scene, t seconds after leaving the station, is given in the following table: Time (s) Distance (km) 0 0.5 a. Over which 30-second interval(s) did the ambulance travel the fastest? b. Over which 30-second interval(s) did the ambulance travel the slowest? c. Determine the average speed of the ambulance, in kilometres per hour, over its entire trip to the accident. 0 30 60 1.5 90 1.75 120 2.75 150 3.25 180 4.0
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You are a crime scene investigator trying to match the lead content of bullet fragments found at a crime scene to the lead content of a box of bullets found with a suspect. To simplify this question, assume that the instrument you use gives you one measurement per fragment in grams/cm3. Assume that you have 5 measurements from fragments found at the crime scene and 7 measurements from bullets found with the suspect. (b) What are H0and Ha? Write them both mathematically and in words. (c) You run the analysis and the p-value is 0.0001 and α = 0.001, and β = 0.9. If you reject H0, what is the probability that you made the wrong decision in this case?
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The object of a general chemistry experiment is to determine the amount (in millilitres [mL]) of sodium hydroxide (NaOH) solution needed to neutralize 1 g of a specified acid. This will be an exact amount, but when the experiment is run in the laboratory, variation will occur as the result of experimental error. Three titrations are made using phenolphthalein as an indicator of the neutrality of the solution (pH equals 7 for a neutral solution). The three volumes of NaOH required to attain a pH of 7 in each of the three titrations are as follows: 82.20, 75.80, and 75.34 mL. Use a 99% confidence interval to estimate the mean number of millilitres required to neutralize 1 g of the acid. (Round your answers to three decimal places.) mL to
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Suppose the total income in dollars from a machine is given by the following. I= 10e0.5t, 0sts 6, tin hours Find the average income (in dollars) over this 6-hour period. (Round your answer to the nearest cent.) $
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