200 feet in 30 seconds is what speed?
2 answers:
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Answer: Option (C) is the correct answer.
Explanation:
When chemical composition of a substance is not changing in a chemical reaction then it is known as a physical change.
For example, when water change state, from ice to steam then it means solid state is changing into gaseous state.
Therefore, it is a physical change.
And, a reaction which causes change in chemical composition is known as a chemical change.
For example,
Thus, we can conclude that we can see water change state, from ice to steam. This is a physical change in matter.