Understanding Power: Calculating Energy Transfer Rate and Power

Understanding Power: Calculating Energy Transfer Rate and Power

Assessment

Interactive Video

Physics, Science

10th Grade - University

Hard

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The video tutorial explains how to define and calculate the rate at which energy is transferred, using examples like a light bulb, TV, car engine, and lift motor. It introduces the power equation, P = E/t, where P is power in watts, E is energy in joules, and t is time in seconds. The tutorial demonstrates calculations for energy transfer over different time periods and provides practical examples to illustrate the concepts.

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3 questions

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1.

OPEN ENDED QUESTION

3 mins • 1 pt

What is the power of the TV when it uses 150,000 joules over 10 minutes?

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2.

OPEN ENDED QUESTION

3 mins • 1 pt

Calculate the energy transferred by a car's engine with a power of 66,000 watts in three minutes.

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3.

OPEN ENDED QUESTION

3 mins • 1 pt

How long does it take for a lift powered by a 2,700-watt motor to gain 120,000 joules of gravitational potential energy?

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