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dybincka [34]
3 years ago
11

Assuming the carbon cycle is a closed system, which of the following statements is true?

Physics
2 answers:
In-s [12.5K]3 years ago
7 0

Answer:

Mass and energy are conserved in the carbon cycle.

Explanation:

Study island :P

ella [17]3 years ago
5 0
Please add answer options :)
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After walking across a carpeted floor in socks, Jim brings his finger near a metal doorknob and receives a shock. what does that
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When you touch<span> a doorknob (or something else made of metal), which has a positive charge with few electrons.</span>
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Convert 400 mm to m using the method of dimensional analysis
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Answer:

To convert 400 mm to m you can apply the formula [m] = [mm] / 1000; use 400 for mm. Thus, the conversion 400 mm m is the result of dividing 400 by 1000. 0.4

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Give the 7 color harmonies​
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Answer:

Complementary colors.

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Explanation:

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A train whistle is heard at 300 Hz as the train approaches town. The train cuts its speed in half as it nears the station, and t
givi [52]

To solve this problem we will apply the concepts related to the Doppler effect. The Doppler effect is the change in the perceived frequency of any wave movement when the emitter, or focus of waves, and the receiver, or observer, move relative to each other. Mathematically it can be described as,

f = f_0 (\frac{v_0}{v_0-v})

Here,

f_0 = Frequency of Source

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f = Frequency heard before slowing down

f' = Frequency heard after slowing down

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So if the speed of the train after slowing down will be v/2, we can do a system equation of 2x2 at the two moments, then,

The first equation is,

f = f_0 (\frac{v_0}{v_0-v})

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Now the second expression will be,

f' = f_0 (\frac{v_0}{v_0-v/2})

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v = 22.12m/s

Therefore the speed of the train before and after slowing down is 22.12m/s

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3 years ago
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