Question bank: Energy Transformation

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Question 1:

Easy

Energy conversion is the process of transforming one form of energy into another. It is a phenomenon present in various daily activities, from the production of electricity to the operation of mechanical tools. What are the main sources of energy that can be converted?

Energy Transformation

Contextualized Question

Question 2:

Hard

Consider the following excerpt from a scientific article: 'Energy is constantly transformed from one form to another in natural processes and in technologies that support modern society. In a thermal power plant, the energy contained in the fuel is initially thermal, but through a series of conversions, including mechanical and electrical, it is finally transformed into electrical energy that can be distributed and used to power different devices.' Based on this context, answer: (1) Explain, step by step, the energy transformations that occur in a thermal power plant, from the energy contained in the fuel to the production of electricity. (2) Consider a hypothetical scenario in which the energy conversion efficiency in a thermal power plant is only 20%. If a fuel contains 1 megajoule (MJ) of energy, how much of that energy will be effectively converted into electricity.

Energy Transformation

Theorical Question

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Question 3:

Easy

Imagine you are at an amusement park and observe a ride called 'The Drop Tower'. In this ride, an elevator takes people to the top of a tower and then releases them in free fall. During the descent, gravitational potential energy is converted into kinetic energy. Consider that the mass of the empty elevator is 1200 kg and it descends from a height of 50 m. 1. Calculate the gravitational potential energy of the elevator at the highest point of the tower. 2. Assuming that all gravitational potential energy is converted into kinetic energy at the lowest point of the fall, calculate the kinetic energy of the elevator at that point.

Energy Transformation

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Question 4:

Easy

In addition to the habits mentioned above, there are other ways to take advantage of electrical energy that can be adopted by the end consumer.

Energy Transformation

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Question 5:

Medium

Energy transformation is a process that aims to change the way it is presented, so that it can be used in various types of processes. What are the main forms of energy transformation?

Energy Transformation

Contextualized Question

IARA TIP

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