4 years ago

Does sound travel faster in a warm room or a cold room? Explain your answer.

Physics

2 answers:

notsponge [240]4 years ago

4 0

Warm air because cold air makes the molecules more close

Mashcka [7]4 years ago

3 0

A warm room. sound travels faster in places with more excited molecules.

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An advantage of light microscopes compared to electron microscopes is that light microscopes _____.

ivolga24 [154]

<span>C is the correct answer. Electron microscopes require a vacuum to work, so living cells cannot be seen because they cannot respire. Light microscopes use a ray of visible light instead of a beam of electrons to magnify something so it can be seen by the naked eye. There are two different types of electron microscope: transmission (TEM) and scanning (SEM).</span>

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3 years ago

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Hooke’s law states that the distance that a spring is stretched by hanging object varies directly as the mass of the object. If

trasher [3.6K]

Answer:

$d_{2}$ = 33.33 cm

Explanation:

Given:

When mass, $m_{1}$ =21 kg

distance travelled is $d_{1}$ = 140 cm

When mass, $m_{2}$ =5 kg

distance travelled is $d_{2}$ = ?

Hooke's law state that within elastic limit, when an external force is applied to a body, the body gets deformed and when the force is released the gets back to its original form.

Therefore according to the question,

$\frac{d_{1}}{m_{1}}=\frac{d_{2}}{m_{2}}$

$\frac{140}{21}=\frac{d_{2}}{5}$

$d_{2}$ = 33.33 cm

Distance travelled is 33.33 cm when mass is 5 kg.

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3 years ago

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schepotkina [342]

Answer:

thanks for the points

Explanation:

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3 years ago

PLEASE HELP

jasenka [17]

Don't over think it!

For example, if you do 5 laps in 5 minutes then you do one lap per minute. If you use that example and you apply it to your problem you'll notice that the answer is simply C. 1km/min.

Best wishes!

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3 years ago

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the average velocity of a bus is 15 m/s. If it starts off going 15m north and then 20m south, how long will the bus ride take?

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