Name the three types of labor unions and name several industries in which those union types dominated that industry's labor market. Briefly describe the collective bargaining process and comparatively, binding arbitration. State reasons for the dwindling segment of labor market supplied by unions
You stand 5 meters away from two machines. One machine operates at a sound intensity level that is 50 dB at your location. The other machine operates at a sound intensity level of 70 dB at your location. What sound intensity level do you hear (measure in dB) when both machines are turned on?
The sound waves used in speech have wavelengths of a few meters. Explain in 4-6 sentences why some of the sound waves emerging from a person’s mouth go to the sides so that they can be heard even if listeners are not in front of the person. Include any relevant diagrams and equations.
4. What name (term) is given to the speed of sound?
Problem 4 (6 pts) A tire explodes 200m from you. You measure the sound intensity at 4.00×10-2 W/m2 for 0.1s. a) What is the total amount of energy transferred away from the explosion by sound? b) What sound level (in decibels) do you hear?
at a distance of a few meters one mosquito produces a sound that is barely audible, about 10 db. what would be the sound level for 10,000 of these insects all together at this same close range
4. Your ears detect a sound wave with a frequency of 315 Hz and a sound intensity level of 80 dB. It originated in a vibrating string with a length of 1.9 meters. A) Waves can be longitudinal or transverse. What is the difference between these two kinds of waves? B) This question has one longitudinal wave and one transverse wave. Identify them. C) Recall that the sound you hear from a string is the fundamental frequency, which has a...
There are three meters installed in the room to measure the room temperature. The meters give the following values: 72 F, 74 F, and 71 F. What should be the best estimate of the room temperature if all meters have the sane accuracy? If we know that the first meter is much more accurate and the variances (σ2) of the three meter are 0.01, 1, and 0.09, what is the best estimate of the room temperature?
2. (2 pts) A sound level of 150 dB is measured at 2 meters from a jet engine. Find the sound intensity B of the jet engine at a distance of 20 meters assuming intensity falls off as 1/2. (Hint: First find intensity at 150 dB sound level.) 150dB 150d. B = 10Log G-1z) = 1000 W/m2 B (dB) = 2 m. B = I=100x701450) - 1000 W/m2 1000 11/12 = 'rz 2009 10-12
Suppose we measure a sound intensity of 1 W/m2. What sound intensity level (SIL) in dB does this correspond to?