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never [62]
3 years ago
6

What has occurred when metal changes color because of tarnishing?

Physics
2 answers:
ycow [4]3 years ago
8 0
Answer is: A chemical change occured when a metal changed color because it reacted with another substance. In chemical change new substances are formed, the atoms are rearranged and the reaction is followed by an energy change
Arisa [49]3 years ago
6 0
I believe the answer is A
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The graph shows a wave that oscillates with a frequency of 60 Hz. Based on the information given in the diagram, what is the spe
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900 cm/s or 9 m/s.

Explanation:

Data obtained from the question include the following:

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This is illustrated below:

Since the wave have 4 node, the wavelength of the wave will be:

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λ = 2×30/4

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frequency (f) = 60 Hz

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v = 900 cm/s

Thus, converting 900 cm/s to m/s

We have:

100 cm/s = 1 m/s

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3 years ago
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Answer:

Please, in the Explanation section you will find the explanation of the answer.

Explanation:

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