136 Best Energy Questions and Answers (Q&A) - ProProfs Discuss

Which energy transformation occurs in a toaster?

Mike John, Content Explorer
Answered: Jul 08, 2019

The correct answer to this question is C, Electric to thermal. Electric toasters are used in many homes to make toast, waffles, and frozen pastries. A toaster transfers electric energy taken from...Read More

3 Answers

2339 views

What device converts chemical energy to mechanical energy?

D. gray, Builder
Answered: Apr 19, 2019

All of the given examples can be converted from chemical energy to mechanical energy. Human beings usually need sugar and other types of food in order to become energized. Once they become...Read More

2 Answers

1758 views

Why is the reaction H2 + Cl2 → 2HCl exothermic?

T. Moore, Writer
Answered: Mar 07, 2019

In exothermic reactions, more energy is involved when bonds are formed in the products than used to break the bonds reactant. If the total energy required to break bonds in the reactants is...Read More

2 Answers

1547 views

How many homes can a 1 megawatt (MW) wind turbine power?

Emerlyes
Answered: Aug 01, 2021

225-300

An average U.S. household uses about 10,655 kilowatt-hours (kWh) of electricity each year. One megawatt of wind energy can generate from 2.4 to more than 3 million kWh annually....Read More

1 Answer

1142 views

Which requires more work?

John Smith
Answered: Aug 01, 2021

Both require the same amount of work-work involves a force acting upon an object to cause a displacement. the amount of work done is found by multiplying f*d*cos(theta). the equation can be used for...Read More

2 Answers

1137 views

What is the probable density of the granitic bedrock?

W. Kaye, Ex-Marine
Answered: Mar 27, 2019

B is the answer to this question. The answer is based on the shown diagram. There are some people who may get confused with what a bedrock actually is. This is the type of solid rock that is...Read More

2 Answers

881 views

Which of the following is the least amount of energy?

Robert Hazlewood, Senior Executive
Answered: May 30, 2019

There are a lot of people who feel that their lack of energy is the reason why they are unable to do the tasks that they have to do. The various units that are used to describe energy will also...Read More

2 Answers

817 views

What has happened to the light passing through the water to cause the given-below difference?

M. Krasinski, Content Writer
Answered: Feb 11, 2019

Reflection is a part of science which can best be described as waves in which they have changed directions. The most common place to find this reflection is in mirrors or in a lake. In light,...Read More

2 Answers

782 views

What is the average power supplied by a 60.0 kg person running up a flight of stairs a vertical distance of 4.0 m in 4.2 s?

D. gray, Builder
Answered: Apr 19, 2019

There are always some different types of power and energy that are being produced by people depending on the movement that they do. Take note that there are various factors that can also affect...Read More

3 Answers

759 views

What will be the speed of the mass after sliding 4.0 m along the plane?

W. Pratt, Marketing Analyst
Answered: Apr 10, 2019

The correct answer to this question is 3/5 m/s.This question is one which would be used in physics and relates to kinetic energy. Mass has an affect on accelaration, which affects speed...Read More

2 Answers

688 views

Is moon the source of useable energy?

Jisalman
Answered: Aug 01, 2021

The moon

1 Answer

677 views

How much kinetic energy does the ball gain from the player?

R. Jones, Student
Answered: May 17, 2019

The correct answer to this question is A, 0.5J. Kinetic energy is the energy of a body or object that it holds due to motion. This energy is used in physics and is gained during acceleration. The...Read More

2 Answers

599 views

Where does the energy go?

Malcolm Carneal, Digital Nomad
Answered: Aug 25, 2020

It is true that energy will always be there. There are times when kinetic will turn into potential energy but it would just need another item that can turn it into kinetic energy. The given...Read More

3 Answers

597 views

What is the power requirement of the escalator in order to move this number of passengers in this amount of time?

Bergeront Tiffney, Computer Engineer
Answered: Jan 03, 2019

Since I am not a scientist, I can neither confirm nor deny the previous answer. However, I would plug the numbers into the equation myself to double check the work and see if that equation comes...Read More

2 Answers

592 views

What can you infer about fossil fuels from the name?

Jisalman
Answered: Aug 01, 2021

That they ve been buried in the earth s crust for millions of years

1 Answer

591 views

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