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Physics, 05.01.2021 22:20 kenziepickup

Colin is conducting an experiment about static electricity. To start his experiment, he has two balloons. He rubs one of the balloons on his head and then places both balloons close to the wall. What is the control in his experiment? Both balloons in the experiment

The balloon he does not rub against his head

The balloon he rubs against his head

The wall he uses to test static electricity

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