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3 years ago

A bar of gold has a temperature of 31°C, and a bar of aluminum has a

Physics

1 answer:

Katarina [22]3 years ago

3 0

Different dense matters

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3 years ago

You hear a sound with a frequency of 256 Hz. The amplitude of the sound increases and decreases periodically: It takes 2 seconds

Fiesta28 [93]

These 255.75 Hz and 256.25 Hz sounds can be thought of as a sum of two waves with frequencies.

Answer: Option A

<u>Explanation:</u>

To solve this, it is necessary to take into account the concepts related to frequency and period, and how they are related to each other.

Let frequency of beat = f

The relationship that defines both agreements is given by the equation,

$f=\frac{1}{T}$

Then the frequency for the previous period given (2sec) is

$f=\frac{1}{2}=0.5$

The beat frequency of two frequencies is equal to the difference between the two frequencies, then

$f=\left|f_{1}-f_{2}\right|$

$f=|255.75-256.25|=0.5 H z$

Hence, Option A is correct.

Similarly we can check like these for other options too as below,

For option B, $f=|255.5-256.5|=1 Hz$ .

For Option C, $f=|255-257|=2 H z$

For Option D, $f=|254-258|=4 H z$

For Option E, $f=|256-2|=254 H z$

Therefore, the sum of the frequencies in the sound wave would be 256.25Hz and 255.75Hz.

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3 years ago