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mihalych1998 [28]
4 years ago
14

Which of the following can be characterized as a physical change?

Chemistry
1 answer:
Taya2010 [7]4 years ago
7 0

Answer:

D. Sweat evaporates from your skin

Explanation:

A physical change is a reversible process, no new substance is formed. A physical change does not affect the chemical composition of a substance.

Sweat evaporation from the skin is a physical change, because the change that occur is merely a change of state, Liquid to Gaseous state, no new substance is formed.

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Since I already answered the first two I will tell you the third one!

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What is the difference between the mass number of an isotope and its atomic number?
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Which option draws the correct conclusion from the following case study?
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1. What would happen if you aimed light from the magenta part of the Horsehead Nebula through a spectrograph?
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Given what we know, we can confirm that if you aimed light from the magenta part of the Horsehead Nebula through a spectrograph we would be able to determine more precisely the structure and details of the cloud.

<h3>How do we use Spectrums in order to understand stars?</h3>

The spectrums recorded by scientists, such as those of stars or nebulas like the horsehead nebula can tell us a great deal about the composition of said entities. Studying the spectrum can tell scientists about the chemical composition of stars or nebulas, such as information about the elements that form them, like their temperatures and densities.

<h3 /><h3>How would a discontinuous emission of hydrogen gas look in the spectrum?</h3>

This would appear as pauses in the lines of the spectrum. If the emission of the hydrogen gas were constant, there would be a continuous line on the spectrum graph to indicate the illuminated hydrogen, though if this line were discontinuous, we would be able to assume that its source is emission from another gas instead.

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To learn more about spectrographs visit:

brainly.com/question/15290407?referrer=searchResults

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