Answer:
frequencies are 106.5 Hz and 138.30 Hz
Explanation:
The difference in path length is 37.3 - 26.1 m = 11.2 m
For cancellation, Above given length must be a odd number of half-wavelengths.
Minimum wavelength is ( 343 m/s / 150 Hz) = 2.29 m
Maximum wavelength is (343 m/s / 100 Hz) = 3.43 m
11.2 / 2.5 = 4.48 m => too long
11.2 / 3.5 = 3.2 m => ok
11.2 / 4.5 = 2.48 m => ok
11.2 / 5.5 = 2.03 m => too short
so we have following possible frequencies
The correct choice is
D. 22 Hz and 42 Hz.
In fact, the beat frequency is given by the difference between the frequencies of the two waves:
In this problem, the beat frequency is , therefore the only pair of frequencies that gives a difference equal to 20 Hz is
D. 22 Hz and 42 Hz.
Answer: Option (b) is the correct answer.
Explanation:
A gamma particle is basically a photon of electromagnetic radiation with a short wavelength.
Symbol of a gamma particle is . Hence, charge on a gamma particle is also 0.
For example,
So, when a nucleus decays by gamma decay to a daughter nucleus then there will occur no change in the number of protons and neutrons of the parent atom but there will be loss of energy as a nuclear reaction has occurred.
Thus, we can conclude that the statement daughter nucleus has the same number of nucleons as the original nucleus., is correct about if a nucleus decays by gamma decay to a daughter nucleus.