A jet flies at a speed of Mach 1.3. What is the half-angle of the conical shock wave formed?
A) 36°
B) 100°
C) 30°
D) 50°
E) 44°
D
Physics & Space Science
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Which metric prefix means one thousand?
a. milli- b. centi- c. one- d. kilo- e. mega-
Physics & Space Science
The sound of a bird singing is given as 5 dB. What is the intensity of the sound of a bird singing?
a. 
b. 
c. 
d. 
e. 
Physics & Space Science
The general formula R-X is that of
a. an amine. b. an alkyl halide. c. an alcohol. d. none of these
Physics & Space Science
If the voltage between the plates of a parallel-plate capacitor is doubled, the charge on the capacitor
A) is tripled. B) is doubled. C) is halved. D) quadruples. E) remains the same.
Physics & Space Science