Question

Sid wants to compare two different brands of batteries. Which of the following experiments would help sid do this? A. Use one battery brand in a portable radio and the other brand in a remote-control car and compare their performance. B.Use one battery brand to power a handheld fan on a hot day and the other battery brand to power the fan on a cold day. C. Compare how long it takes to recharge a size AA battery from one brand with how long it takes to recharge a size D from the other brand. D. Use each battery brand on the same portable radio and measure how long the batteries last.

Answer 1

D. Use each battery brand on the same portable radio and measure how long the batteries last.

Explanation:

When comparing things to each other in an experiment, the only difference in the experimental set-up should be the things being compared. In this case, the battery brand is the thing being compared, and so everything but the brand should remain the same.

Answer 2

Use each battery brand on the same portable radio and measure how long the batteries last.

Step-by-step explanation:

When comparing things to each other in an experiment, the only difference in the experimental set-up should be the things being compared. In this case, the battery brand is the thing being compared, and so everything but the brand should remain the same.