Conceptual Physical Science Explorations
2nd Edition
ISBN: 9780321567918
Author: Paul G. Hewitt, Leslie A. Hewitt, John A Suchocki
Publisher: Addison Wesley
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Question
Chapter 6, Problem 18RQ
To determine
The ultimate source of energy of fossil fuels, dams and windmills?
Expert Solution & Answer
Answer to Problem 18RQ
The ultimate source of energy of fossil fuels, dams and windmills is Sun.
Explanation of Solution
The original source of energy found all around the world comes directly or indirectly from Sun. The energy of fossil Energy is all around the environment and comes from many sources. Sun. The energy of fuels, dams and windmills ultimately comes from the Sun.
Solar energy is responsible for the energy in coal. The solar energy helps plants to create their food through photosynthesis. When these plants get buried inside Earth due to some earthquakes of natural disasters, then it turns into coal after a long decomposition reaction that runs thousands of years. Thus, the ultimate source of energy in coal is solar energy.
Windmills generate electricity using the momentum of wind, and its ultimate source is the Sun. The Sun heats the Earth’s surface and the Earth increase thermal energy of the air above it, causing wind. So, the ultimate source of energy in windmills is Sun.
Electrical energy from dam is generated using the momentum of water flow, its ultimate source is Sun. Water evaporated by the Sun forms clouds and rains to give flowing streams and rivers.
Conclusion:
Therefore, the ultimate source of energy of fossil fuels, dams and windmills is Sun.
Chapter 6 Solutions
Conceptual Physical Science Explorations
Ch. 6 - A force sets an object in motion. When the force...Ch. 6 - Cite an example where a force is exerted on an...Ch. 6 - Which requires more work-lifting a 50-kg sack a...Ch. 6 - If both sacks in the preceding question are lifted...Ch. 6 - What are the two main forms of mechanical energy?Ch. 6 - Exactly what is it that a body having energy is...Ch. 6 - A car is lifted a certain distance in a service...Ch. 6 - Two cars are lifted to the same elevation in...Ch. 6 - How many joules of potential energy does a 1-N...Ch. 6 - A moving car hovas kinetic energy. If it speeds up...
Ch. 6 - Compared to some original speed, how much work...Ch. 6 - What will be the kinetic energy of a pile driver...Ch. 6 - Can a machine multiply input force Input distance...Ch. 6 - If a machine multiplies force by a factor of 4,...Ch. 6 - If the man in Figure 6.22 pulls of rope downward...Ch. 6 - What is the efficiency of a machine that...Ch. 6 - Is a machine that has efficiency greater than 100...Ch. 6 - Prob. 18RQCh. 6 - What is the source of geothermal energy?Ch. 6 - The energy we require fro existence comes from the...Ch. 6 - Calculate the work done when force of 2 N moves a...Ch. 6 - calculate the work done when a 15-N force pushes a...Ch. 6 - Calculate the watts of power expended when a force...Ch. 6 - Calculate the power expended when a 20 N force...Ch. 6 - How many joules of potential energy does a 1.5kg...Ch. 6 - Calculate the increase in potential energy when a...Ch. 6 - Calculate the number of joules of kinetic energy...Ch. 6 - Calculate the kinetic energy of a 3-kg dog that...Ch. 6 - How much work is required to increase the kinetic...Ch. 6 - What change in kinetic energy does a model...Ch. 6 - The mass and speed of three vehicles is shown...Ch. 6 - Prob. 2TCCh. 6 - The roller coaster starts from rest at point A,...Ch. 6 - Consider the efficiency of these four machines:...Ch. 6 - When the mass of a moving object is doubled with...Ch. 6 - When the velocity of an object is doubled, by what...Ch. 6 - Consider a ball thrown straight up in the air. At...Ch. 6 - At what point in its motion is the KE of a...Ch. 6 - A physical science teacher demonstrates energy...Ch. 6 - Discuss the design of the roller coaster shown in...Ch. 6 - Suppose that you and two classmates are discussing...Ch. 6 - Consider a mouse and dog running along a road have...Ch. 6 - Consider molecules of hydrogen (tiny ones) and...Ch. 6 - According to the work-energy theorem, in the...Ch. 6 - When a driver applies brake to keep a car going...Ch. 6 - On a slide a child has potential energy that...Ch. 6 - Consider the identical balls released from rest on...Ch. 6 - You tell your friend that no machine can possibly...Ch. 6 - Two lumps of clay with equal and opposite momenta...Ch. 6 - An automobile engine runs on compressed air. This...Ch. 6 - Consider the swinging-balls apparatus. If two...Ch. 6 - Does a high-efficiency machine degrade a...Ch. 6 - If an automobile had a 100% efficient engine,...Ch. 6 - A friend says that the energy of the oil and coal...Ch. 6 - How many joules of work are done when a force of...Ch. 6 - ( a ) How much work is done when you push a crate...Ch. 6 - This question is typical on some drivers license...Ch. 6 - A force of 50N is applied to the end of a lever,...Ch. 6 - Consider an ideal pulley system. If you pull one...Ch. 6 - How many watts of power expanded when a force of...Ch. 6 - How much work is done on a 100-kg crate that is...Ch. 6 - How much power is required to raise a 100-kg crate...Ch. 6 - Raising an auto in a service station increases its...Ch. 6 - A model airplane moves three times as fast as...Ch. 6 - Which of the following equations is most useful...Ch. 6 - A shiny sports car at the top of a vertical cliff...Ch. 6 - When a hybrid car brakes to a stop, much of its...Ch. 6 - In an ideal pulley system, a woman lifts a...Ch. 6 - When 100J are put into a device that puts out 40J,...Ch. 6 - A machine cannot multiply (a) forces (b)...
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