B is the correct answer since acid corrode on metals such as carbon, steel, zinc and such.
Answer:
In a controlled experiment, an independent variable (the cause) is systematically manipulated and the dependent variable (the effect) is measured; any extraneous variables are controlled. The researcher can operationalize (i.e. define) the variables being studied so they can be objectivity measured.
Answer:
1. A
sound can't travel through vacuum only
1. C
<span>2. G </span>
<span>3. H </span>
<span>4. J </span>
<span>5. B </span>
<span>6. I </span>
<span>7. D </span>
<span>8. E </span>
<span>9. A </span>
10. F and <span>For the best answers, search on this site </span>https://shorturl.im/FbQuG<span> </span><span>
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