A jet plane has a sound level of 150 dB. What is the intensity in W/m2?
a. 1
b. 100
c. 10
d. 1 000
e. 10 000
d
You might also like to view...
The units of momentum are
A. ML/T.
B. M/T.
C. 
D. 
E. 
A prismatic bar (diameter d0 5 18 mm) is loaded by force P1. A stepped bar (diameters d1 5 20 mm and d2 5 25 mm with radius of fillets R 5 2 mm) is loaded by force P2. The allowable axial stress in the material is 75 MPa. The ratio P1/P2 of the maximum permissible loads that can be applied to the bars, considering stress concentration effects in the stepped bar, is:
(A) 0.9
(B) 1.2
(C) 1.4
(D) 2.1
In the process of breaking down the ozone layer, the chlorine from the CFCs acts as a ________
Fill in the blank(s) with correct word
A converging lens always forms an object's image at the focal point of the lens
a. True b. False Indicate whether the statement is true or false