If a fast-moving car making a loud noise approaches and moves past the person, what will happen as the distance between the two
increases which one is it? A. The pitch of the sound being heard by the person will appear to be higher than the pitch of the source.
B. The frequency of the sound waves reaching the person's ear will be greater than the frequency of the waves leaving the car. C. The pitch and frequency of the sound waves reaching the person's ear will remain unchanged.
D. The pitch of the sound being heard by the person will appear to be lower than the pitch of the source.
D) The pitch of the sound being heard by the person will appear to be lower than the pitch of the source.
Explanation:
The sensation of a frequency is usually related to as the pitch of a sound. A high pitch sound relates to a high-frequency sound wave and a low pitch sound relates to a low-frequency sound wave. Whereas loudness depends on the power of the wave. In overall, the pitch is the cause behind the variation in voice quality for several people. The pitch of a sound depends on the frequency while loudness of a sound depends on the amplitude of sound waves.
If a fast-moving car making a loud noise approaches and moves past the person, according to the Doppler effect, what will happen as the distance between the two increases is that D) the pitch of the sound being heard by the person will appear to be lower than the pitch of the source.
When a solid substance is dissolved in a liquid such as water, the intermolecular forces of attraction between the molecules in the solid substance are overcome and they exist as ions in the solution. Hence the answer is 2.
