Question

Emily wanted to see what battery lasted the longest. She put each battery into a clock and recorded the time that the clock stopped. She used Duracell, Energizer, Kroger bran, and EverReady. What is the control variable and the contstants?

Answer 1

The control variable in Emily's experiment could be any unchanged factor like clock type, while the constants are conditions that remained the same for all batteries tested. The problems provided focus on calculating energy content, battery life, and evaluating a company's product claim in a real-world context.

Step-by-step explanation:

In Emily's experiment, the control variable could be any factors she kept constant, such as the type of clock used, the environment in which the clocks were kept (temperature, humidity, etc.), and the start time for each battery. The constants are all the conditions that were kept the same for each battery tested to ensure a fair comparison, like the brand and model of clock, as well as the conditions under which the experiment took place.

Looking at the supplied problems, they deal with calculating energy content and battery life which are essential concepts in Physics, particularly related to electric circuits and power consumption.

Problem 91 touches upon statistical analysis with a real-world application in evaluating a company's claim about their product. It involves using a calculator to determine the probability of a sample mean being at a certain value or lower, which is an interesting application of statistics in a Physics context.