Beats: Two pure tones are sounded together and a particular beat frequency is heard. What happens to the beat frequency if the frequency of one of the tones is increased?
A. It increases.
B. It decreases.
C. It does not change.
D. It could either increase or decrease.
Answer: D
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The figure shows a ‘snapshot’ of four different waves in identical ropes stretched with the same force
The wave with the largest wavelength is wave
a.
I.
b.
II.
c.
III.
d.
IV.
e.
all of the above
To create the above spectra, which of the following is NOT true?
a. Light from a blackbody passed though a cool, low-density gas.
b. Light from a continuous spectrum passed through a cool, low-density gas.
c. Light from a hot, dense gas produced light at all wavelengths.
d. All of the other choices are not true.
What is the principal difference between a hydrogen bomb and a uranium bomb?
A) A uranium bomb is an atomic bomb, and a hydrogen bomb is a nuclear bomb. B) A uranium bomb utilizes a fission reaction whereas a hydrogen bomb utilizes a fusion reaction. C) Both work on the same principle, but the hydrogen bomb has a higher yield. D) A hydrogen bomb converts mass into energy, whereas a uranium bomb does not. E) One results in radioactive fallout, and the other does not.
What is the wavelength of light that has a frequency of 3 MHz?
a. 9 × 10^14 Hz b. 1 × 10^14 m c. 9 × 10^14 m d. 100 m e. 0.01 m