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Triss [41]
3 years ago
6

Which of these is not an example of a physical change?

Physics
2 answers:
horsena [70]3 years ago
5 0
A. a nail rusting is not a physical change its a chemical change
amm18123 years ago
3 0
A nail rusting is an example of chemical change as the iron is oxidized to become rust. This is not a physical change.
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svet-max [94.6K]
 We can rearrange the mirror equation before plugging our values in. 
1/p = 1/f - 1/q. 
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1/p = 4/40cm - 1/40cm = 3/40cm
40cm=3p  <-- cross multiplication
13.33cm = p

Now that we have the value of p, we can plug it into the magnification equation.

M=-16/13.33=1.2
1.2=h'/8cm
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Answer:

Most interstellar clouds are much bigger than our solar system.

Explanation:

An interstellar cloud  refers:

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They are much bigger than our solar system.

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