When the handle of a tuning fork is held solidly against a table, the sound becomes louder and the time that the fork keeps vibrating
A) becomes longer.
B) becomes shorter.
C) remains the same.
Answer: B
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a. 59% b. 35% c. 21% d. 41% e. 77%
What is the intensity of sound from a band with a sound level of 120 dB? (I0 = 10-12 W/m2)
a. 1 W/m2 c. 10 W/m2 b. 1.2 W/m2 d. 12 W/m2
The wavelength of ultrasound at 1 million Hz in air where the speed of sound is 340 m/s is __________
Fill in the blank(s) with correct word
Red giant stars are I. more luminous than the sun. II. larger in diameter than the sun. III. cooler than B stars. IV. located above the main sequence stars in the H-R diagram
a. I & II b. II & IV c. I, II, & IV d. II, III, & IV e. I, II, III, & IV