A sound of 40 decibels is
A) four times as intense as a sound of 20 decibels.
B) twice as intense as a sound of 20 decibels.
C) 1000 times as intense as a sound of 20 decibels.
D) 100 times as intense as a sound of 20 decibels.
E) 10 times as intense as a sound of 20 decibels.
D
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A standing wave of the third overtone is induced in a 1.2-m pipe that is open at one end and closed at the other end. The speed of sound in the pipe is 340 m/s
(a) How many antinodes are there in the standing wave pattern? (b) What is the frequency of the sound produced by the pipe in this situation?
What is so special about the carbonaceous chondrites
a. rich in hydrogen and helium b. rich in organic compounds c. rich in nitrogen d. rich in oxygen e. rich in rare metals, such as gold
Observations indicate that it takes Saturn longer than Jupiter to complete one orbit about the Sun. This is in agreement with which of Kepler's laws?
A. First B. Second C. Third D. Fourth
What is the angle of incidence on an air-to-glass boundary if the angle of refraction in the glass (n = 1.52) is 28.0°?
a. 18.0° b. 28.0° c. 42.6° d. 45.5° e. 18.4°