The power developed by the student is 756.9 J/s and remains the same if the student takes the same time to climb the stairs when climbing it in two's and three's.
<h3>What is power?</h3>
Power is the rate at work is done.
- Power = work done/time
- work done = mass × acceleration due to gravity × height
Work done = 65.5 × 10 × (18 × 0.165) = 1945.35 J
Power = 1945.35/2.57 = 756.9 J/s
If the student climbed the steps in two or three at a time, the power does not change if the time remains the same.
- Time required = Energy/ power
The time required to convert the Big Mac meal from McDonalds = 4 853 440/756.9
Time required = 6412.26 seconds
Therefore, from the power developed by the student, it will take him 6412.26 seconds to convert all the energy in a Big Mac meal.
Learn more about power at: brainly.com/question/1634438
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Answer: A) In case of dark energy increasing significantly, the universe would accelerate its expansion at an ever-increasing rate which later on may result in "Big Rip".
B) In case of dark energy decreasing significantly, the universe would decelerate its expansion which later on may result in "Big Crunch".
Explanation:
In case of significant increase in dark energy, the universe would accelerate its expansion at more increasing rate. Ultimately the expansion would result in scale factor becoming infinite within a finite period of time. As a result due to the repulsive dominance of dark energy the whole universe would come apart resulting in a situation called "Big Rip"
If dark energy were to decrease significantly enough with time, the accelerating expansion of the universe that is observed now would start to decelerate as the mass once again dominates over dark energy. It will result in universe reversing its expansion resulting in its collapse, a situation called "Big Crunch".
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Answer:
The field lines go out of Earth near Antarctica, enter Earth in northern Canada, and are not aligned with the geographic poles.
Explanation: