When a single person can yell
When a single person can yell at a level of 80 dB SPL, determine how many yelling people will it take to reach the intensity of 120 db SPL? (Intensity twice with two listeners triples with three listeners and so on).
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Assume that a random sample of nine measurements from a normally distributed population gives a sample mean of (xbar = 2.57) and a sample standard deviation of s=.3. Use critical values to test H0:u=3 versus Ha:u?3 using levels of significance a=.
Find the value of the linear correlation, r. Round to the nearest thousandth.
The accompanying table lists x = weights (in hundreds of pounds) and y = highway fuel usage rates (in mi/gal) for a sample of domestic new cars.
Find the best-predicted weight for a car that weighs 5900 pounds. Do not round. Make sure you label your answer correctly.
A red laser of 636 nm is aimed via a 0.127 mm-diameter circular pinhole. In the resultant diffraction pattern, what is the angle from the central maximum to the first dark ring?
A specific small car, having a mass of around 920, can accelerate on a level road from rest to 18 (65) in 13.3. By using these data, determine the maximum steepness of a hill.
The sodium lamp employed to calibrate a diffraction grating exhibits the first-order sodium line at 26.0 degrees from the central maximum. i) Determine the angular position of the first spectral line in the hydrogen.
A heavy wooden block rests on the flat table and a high-speed bullet is fired horizontally to the block, the bullet stopping in it. Determine how far will the block slide before coming to a stop?
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