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Mama L [17]
3 years ago
9

The label has been scratched off a tuning fork and you need to know its frequency. From its size, you suspect that it is somewhe

re around 250 Hz. You find a 250-Hz tuning fork and a 270-Hz tuning fork. When you strike the 250-Hz fork and the fork of unknown frequency, a beat frequency of 5 Hz is produced. When you strike the unknown with the 270-Hz fork, the beat frequency is 15 Hz. What is the unknown frequency? O 275 Hz O There is not enough information O 255 Hz O 265 Hz O 245 Hz
Physics
1 answer:
Natali5045456 [20]3 years ago
3 0

Answer:

255 Hz

Explanation:

The beat frequency is the difference in frequency between two frequencies that are close.

Let the the unknown frequency be f.

Sounded with the 250 Hz tuning fork,

|250-f|=5

f = 255 \text{ or } 245

Sounded with the 270 Hz tuning fork,

|270-f|=15

f = 255 \text{ or } 285

The common value of f in both situations is 255 Hz.

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Answer is suspension.

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<h3>Suspension:</h3>

In suspension the solute does not dissolve in liquid. When placed on table for some time, it will settle down at the bottom of the beaker. We can separate particles of solute easily from solvent through filtration.

<h3>Colloid:</h3>

In colloid particles of solute does not dissolve in liquid neither it is settle down. It floats through the solvent. It cannot be separated by filtration.

<h3>Solution:</h3>

In solution the particles of solute dissolve in to the solvent. We cannot identify them as separate. We cannot separate them by filtration. Salt and water solution is an example of it. Evaporation is the technique that is required to separate them.

<h3>Compound:</h3>

In compound, the two elements combine to form a new thing. Resultant/ compound have new or different properties other than its ingredients.

Now, the question was which of the following allow to settle out when sit on a table, so the answer is suspension. Suspension allows the particles to settle out when sit on a tables for some time.

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A gas occupies 210 ml at -73°c. to have the same gas occupy 360 ml: should the temperature be increased or decreased? what is t
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The relation between volume and temperature is direct, this is the higher the temperature the higher larger the volume.

Therefore, if you want that your gas occupies a larger volumen, you should increase the temperature, assuming other conditions (pressure and number of moles) remain unchanged.

The new temperature may be calculated using the proportion:

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Answer: the temperature should be increased to 343 K
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The wall is an insulator.

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