Inquiry into Physics
8th Edition
ISBN: 9781337515863
Author: Ostdiek
Publisher: Cengage
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Chapter 2, Problem 28Q
(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.)
- The first "Lunar Olympics" is to be held on the Moon inside a huge dome. Of the usual Olympic events—track and field, swimming, gymnastics, and so on—which would be drastically affected by the Moon's lower gravity? In which events do you think Earth-based records would he broken? In which events would the performances be no better—or perhaps worse— than on Earth?
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Chapter 5, Section 5.8, Question 32
Determine the length of a rectangular trench you can dig with the energy gained from eating one Milky Way bar (270 cal). Assume that you convert
the energy gained from the food with 5% efficiency and that the trench is 7 meters wide and 1 meter deep. Use the fact that the density of soil is
1000 kg/m³ and the acceleration due to gravity is 9.81 m/s².
Round your answer to two decimal places.
The length of the trench is
the tolerance is +/- 2%
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meters.
Don't use chat gpt ,
In one of the videos I said that a typical American household uses energy at a rate of about 10,000 joules per second. A shorthand unit for this would be "10 kilowatts". Using energy at this rate costs about $1.50 per hour (this is not quite right, as it assumes that all the energy is electrical energy, which is relatively cheap, but let's go with this for an estimate). How much does this energy usage cost for a year?
Chapter 2 Solutions
Inquiry into Physics
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