As the time required to run up a stairs increases, the power developed by that person

decreases
increases
remains the same

Power is the rate of doing work or the energy consumed over a period of time. It can be written as Power = work / time. In the situation above, the work done is constant but the time going up the stairs increases. Power is inversely proportional to time. Therefore, as time increases, the power decreases.

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

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