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mariarad [96]
3 years ago
10

What cause sound? And how do it work

Physics
1 answer:
tatuchka [14]3 years ago
4 0

Answer:

Simple yet quick mechanical vibrations of various elastic substances produce sound. When they are moved or struck to vibrate, the auditory nerve of the ear receives the same sort of vibrations, which are subsequently perceived by the mind.

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If a star appears to be very red (like Betelgeuse), it is likely to be in which spectral class?
Kipish [7]
It would be spectral class M

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Which projectiles will be visibly affected by air resistance when they fall
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Find the period of a wave with a frequency 40 kHz​
Burka [1]

We know that frequency is an inverse value of time f=\dfrac{1}{t} this implies that time is the inverse value of frequency t=\dfrac{1}{f}.

Now since <em>f</em> is <em>40kHz</em><em>,</em><em> </em>we can calculate period or duration for that matter time.

t=\dfrac{1}{40\mathbf{kHz}}=0.000025\mathbf{s}=25\mathbf{\mu s}

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3 years ago
What property does matter have that energy does not'?
krok68 [10]
<span>The property that matter has that energy does not is that matter has size, shape and occupies space. Matter also has inertia. Energy does not have any of these.</span>
8 0
3 years ago
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What mass of silver will occupy a volume of 87.75 mL?<br>The density of silver is 10.49 g/mL.​
Anastaziya [24]

Answer:

The mass of silver that will occupy a volume of 87.75 mL is 920.5 grams.

Explanation:

Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space. In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance. Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

density=\frac{mass}{volume}

So the density of silver is 10.49 g / mL indicates that 10.49 g occupies a volume of 1 mL. Then a rule of three can be applied in the following way: if in 1 mL a mass of 10.49 g is occupied, in 87.75 mL how much mass will it occupy?

mass=\frac{87.75 mL*10.49 g}{1 mL}

mass= 920.5 g

<u><em> The mass of silver that will occupy a volume of 87.75 mL is 920.5 grams.</em></u>

5 0
3 years ago
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