Two sound waves traveling through the air have different frequencies. Consequently, they must also have different
a. amplitudes
b. speeds
c. wavelengths
d. all of the above
C
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People can snorkel down to a depth of roughly one meter. This means that the additional pressure on the air in their lungs is roughly
a. 9 800 N. b. 9 800 Pa. c. 9 800 ATM. d. 19 600 N. e. 19 600 N/m2.
A string with a mass per length of 2.00 gm/m is stretched with a force of 150 N between two points that are 0.500 m apart. The fundamental frequency of the stretched string is in tune with the fundamental frequency of an organ pipe filled with air and open at both ends. The velocity of sound in air at 0
is 331 m/s. What is the length of the organ pipe?
A. 50.2 cm B. 55.2 cm C. 57.5 cm D. 60.4 cm E. 65.3 cm
The length of time the shutter is open when the film is exposed in a camera is determined by the
A) shutter speed. B) f-stop. C) focal length of the lens.. D) focusing. E) diameter of the aperture.
An automobile engine takes in 4000 J of heat and performs 1100 J of mechanical work in each cycle. (a) Calculate the engine's efficiency. (b) How much heat is "wasted" in each cycle?
What will be an ideal response?