Conceptual Physics (12th Edition)
12th Edition
ISBN: 9780321909107
Author: Paul G. Hewitt
Publisher: PEARSON
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Chapter 1, Problem 22RCQ
Choose a particular day in the very near future-and during that day carry a small notebook with you and record every time you come in contact with modern technology. Then write a page or two discussing your dependencies on your list of technologies. Make a note of how you'd be affected if each suddenly vanished, and how you'd cope with the loss.
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Humanity's Energy Needs: Humankind's total annual energy need is approximately 4 x 10^20 J.
a) What is this in Watts?
b) The solar energy reaching the Earth is ~340 W/m^2. If we could collect 100% of the energy hitting 1/20th (5%) of the Earth's surface, and Earth's surface is 5x10^14 m^2, show that we could collect enough energy to meet all of humankind's annual energy needs in less than 12 hours.
c) Alternatively, if we wanted to provide all of humankind's energy needs with wind power, how many 100 MW wind farms are needed? (Assume constant average energy use and no efficiency losses.)
Pl:6: this was all information that was given to me. If need i would need to look it up online.
I said number 6 for a reason, I didn't just put a random #6 now I have to use another question and got an answer I didn't even need
Chapter 1 Solutions
Conceptual Physics (12th Edition)
Ch. 1 - Prob. 1RCQCh. 1 - Prob. 2RCQCh. 1 - When the Sun was directly overhead in Syene, why...Ch. 1 - Earth, like everything else illuminated by the...Ch. 1 - How does the Moon's diameter compare with the...Ch. 1 - Prob. 6RCQCh. 1 - Why did Aristarchus choose the time of a half Moon...Ch. 1 - What are the circular spots of light seen on the...Ch. 1 - What is the role of equations in this book?Ch. 1 - Outline some steps of the scientific method.
Ch. 1 - Distinguish among a scientific fact, a hypothesis,...Ch. 1 - In daily life, people are often praised for...Ch. 1 - What is the test for whether a hypothesis is...Ch. 1 - Prob. 14RCQCh. 1 - What test can you perform to increase the chance...Ch. 1 - Why are students of the arts encouraged to learn...Ch. 1 - Must people choose between science and religion?Ch. 1 - Psychological comfort is a benefit of having solid...Ch. 1 - Clearly distinguish between science and...Ch. 1 - Why is physics considered to be the basic science?Ch. 1 - Poke a hole in a piece of cardboard and hold the...Ch. 1 - Choose a particular day in the very near...Ch. 1 - What is the penalty for scientific fraud in the...Ch. 1 - Which of the following are scientific hypotheses?...Ch. 1 - Prob. 25RCQCh. 1 - Prob. 26RCQCh. 1 - What is probably being misunderstood by a person...Ch. 1 - The shadow cast by a vertical pillar in Alexandria...Ch. 1 - If Earth were smaller than it is, but the...Ch. 1 - The great philosopher and mathematician Bertrand...Ch. 1 - Bertrand Russell wrote, u I think we must retain...Ch. 1 - Your favorite young relative is wondering whether...
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