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larisa86 [58]
3 years ago
10

Explain why a sound becomes louder as you move closer to the source of the sound.​

Physics
1 answer:
Marizza181 [45]3 years ago
6 0

Answer:

The wavelength of frequency of the sound are closer to each other

Or

The frequency of the sound increases as it moves towards you

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Describe a good level of body fat
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Answer: a good level of body fat can be found using your weight and height as a reference.

Explanation:

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3 years ago
A passenger train travels 392 mi in the same time that it takes a freight train to travel 322 mi. If the passenger train travels
Yuri [45]

Answer:

Explanation:

Given

distance traveled by  Passenger train is d_1=392\ mi

distance traveled by  Freight train is d_2=322\ mi

Both take same time to travel

suppose speed of freight train is x mph

so speed of passenger train is 20+x mph

we know time=\frac{distance}{speed}

t=\frac{392}{20+x}=\frac{322}{x}

392x=322x+322\times 20

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3 years ago
About 80 percent of earth volume is made up of what?
kolbaska11 [484]
About 80% of the earth's volume is made of mantle.


 <span>The </span>mantle<span> is a layer inside a </span>terrestrial planet<span> and some other </span>rocky planetary bodies<span>. For a mantle to form, the planetary body must be large enough to have undergone the process of </span>planetary differentiation<span> by </span>density<span>. The mantle lies between the </span>core<span> below and the </span>crust<span> above. The terrestrial planets (</span>Earth<span>, </span>Venus<span>, </span>Mars<span> and </span>Mercury<span>), the </span>Moon<span>, two of </span>Jupiter<span>'s </span>moons<span> (</span>Io<span> and </span>Europa<span>) and the </span>asteroid Vesta<span> each have a mantle made of </span>silicate<span> rock.</span><span>Interpretation of spacecraft data suggests that at least two other moons of Jupiter (</span>Ganymede<span> and </span>Callisto<span>), as well as </span>Titan<span> and </span>Triton<span> each have a mantle made of </span>ice<span> or other </span>solid volatile<span> substances </span>up of Mantle

Hope this helped.
4 0
3 years ago
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Energy can be described in many ways. From the list below, what is the best definition of energy?
max2010maxim [7]

the strength and vitality required for sustained physical or mental activity.

"changes in the levels of vitamins can affect energy and well-being"

synonyms: vitality, vigor, life, liveliness, animation, vivacity, spirit, spiritedness, verve, enthusiasm, zest, vibrancy, spark, sparkle, effervescence, ebullience, exuberance, buoyancy, sprightliness; More

2.

power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines.

Have a great day ~Matya

8 0
3 years ago
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What is common to the terrestrial planets? A. equal rotational periods around the Sun B. thin crust and a dense iron core C. sol
Darya [45]

Answer:

I would say D. All terrestrial planets are made up of rock and minerals and the other planets are made up of that do not have a solid surface.

Answer D.

Explanation:

7 0
2 years ago
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