Pergunta

What do these two changes have in common? stapling an envelope shut rain forming in a cloud Select all that apply. Both are only physical changes. Both are chemical changes. Both are caused by heating. Both are caused by cooling.
Solução

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WandaMestre · Tutor por 5 anos
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Explicação
## Step 1<br />The problem asks us to identify the commonality between two processes: stapling an envelope shut and rain forming in a cloud. <br /><br />## Step 2<br />Stapling an envelope shut involves physically manipulating the envelope, but it does not alter the chemical composition of the envelope. This is a physical change.<br /><br />## Step 3<br />Rain forming in a cloud is a process where water vapor condenses into liquid water. This is also a physical change, as the chemical composition of the water does not change during this process.<br /><br />## Step 4<br />Based on the above analysis, both processes are physical changes, not chemical changes. Therefore, the correct answer is "Both are only physical changes."
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