Conceptual Physics: The High School Physics Program
Conceptual Physics: The High School Physics Program
9th Edition
ISBN: 9780133647495
Author: Paul G. Hewitt
Publisher: Prentice Hall
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Chapter 9, Problem 23A
To determine

The ultimate source of energy derived from the burning of fossil fuels, dams and windmills.

Expert Solution & Answer
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Answer to Problem 23A

Sun is the ultimate source of energy derived from the burning of fossil fuel, from dam and from windmill

Explanation of Solution

Introduction:

Fossil fuel, windmill and dam are the energy sources available which provides the most useable form of the energy.

Fossil fuel contains coal, oil which used in the power plant to drive the large turbines. Coal or oil creates heat energy used to produce the steam which drives the turbine to produce the electricity. So in this case chemical energy of fossil fuel is converted into the electricity. It generates around 65% of total electricity in the worldwide. So the fossil fuel is made up of buried plant which is inside the earth. And for plant sun provides energy in the form of light for the photosynthesis process. So, ultimate source of energy from the fossil fuel is sun.

Potential energy from the water can be used to produce the energy. Water stored in large volume dam can used to drive large turbine to produce electricity. Electricity worldwide provided by hydroelectric plant is around, 16% of total electricity. Water available on the earth is through the process of water cycle. In water cycle water from the cloud come to the ground and again due to evaporation process this water goes back and form the clouds. So heating the water and making the evaporation requires heat energy. That heat energy provides from the sun. So, the ultimate source of the energy from the dam is sun.

Another source of energy is windmills. Kinetic energy of air is utilized for the production of energy in the form of electricity. Energy production rate from windmill is proportional to the speed of the air. Basically wind is produced due to the temperature difference is created. Due to temperature difference air from hot region flows to the cold region. So production of this temperature difference is the key step to produce the energy from the windmill. So, ultimate source of energy from windmill is sun.

Conclusion:

Sun is the ultimate source of energy derived from the burning of fossil fuel, from dam and from windmill.

Chapter 9 Solutions

Conceptual Physics: The High School Physics Program

Ch. 9 - What will be the kinetic energy of an arrow having...Ch. 9 - What does it mean to say that in any system the...Ch. 9 - In what sense is energy from coal actually solar...Ch. 9 - How does the amount of work done on an automobile...Ch. 9 - In what two ways can a machine alter an input...Ch. 9 - In what way is a machine subject to the law of...Ch. 9 - What does it mean to say that a machine has a...Ch. 9 - In which type of lever is the output force smaller...Ch. 9 - What is the efficiency of a machine that requires...Ch. 9 - Distinguish between theoretical mechanical...Ch. 9 - What is the efficiency of her body when a cyclist...Ch. 9 - In what sense are our bodies machines?Ch. 9 - Prob. 23ACh. 9 - What is the ultimate source of geothermal energy?Ch. 9 - Can we correctly say that a new source of energy...Ch. 9 - The mass and speed of three vehicles are shown...Ch. 9 - Consider these four situations. (A) a 3-kg ball at...Ch. 9 - A ball is released at the left end of the metal...Ch. 9 - The roller coaster ride starts with the car at...Ch. 9 - Rank the efficiency of these machines from highest...Ch. 9 - Prob. 31ACh. 9 - Rank the scale readings from greatest to least....Ch. 9 - Calculate the work done when a force of 1 N moves...Ch. 9 - Calculate the work done when a 20-N force pushes a...Ch. 9 - Calculate the work done in lifting a 500-N barbell...Ch. 9 - Calculate the watts of power expended when a force...Ch. 9 - Calculate the power expended when a 20-N force...Ch. 9 - How many joules of potential energy does a 1-kg...Ch. 9 - Calculate the increase in potential energy when a...Ch. 9 - Calculate the number of joules of kinetic energy a...Ch. 9 - How much work is required to increase the kinetic...Ch. 9 - What change in kinetic energy does an airplane...Ch. 9 - Which requires more work: stretching a strong...Ch. 9 - Two people who weigh the same amount climb a...Ch. 9 - A physics teacher demonstrates energy conservation...Ch. 9 - Consider the kinetic energy of a fly in the cabin...Ch. 9 - When a driver applies brakes to keep a car going...Ch. 9 - What is the theoretical mechanical advantage for...Ch. 9 - Dry-rock geothermal power can be a major...Ch. 9 - A stuntman on a cliff has a PE of 10,000 J. Show...Ch. 9 - Relative to the ground below, how many joules of...Ch. 9 - A hammer falls off a rooftop and strikes the...Ch. 9 - A car can go from 0 to 100 km/h in 10 s. If the...Ch. 9 - If a car traveling at 60 km/h will skid 20 m when...Ch. 9 - Place a small rubber ball on top of a basketball...
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