It requires 49 J of work to stretch an ideal very light spring from a length of 1.4 m to a length of 2.9 m. What is the value of the spring constant of this spring?
A) 15 N/m
B) 44 N/m
C) 29 N/m
D) 22 N/m
Answer: A
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The ____ coincides with the period known as the "little ice age" of Europe and North America. This provides one piece of evidence that suggests a link between solar activity and the amount of solar energy Earth receives
a. Maunder sunspot minimum b. Babcock sunspot model c. coronal hole d. Coulomb barrier e. weak solar force
The speed of a 4-kg ball with a momentum of 12 kg m/s is
A) 3 m/s. B) 4 m/s. C) 12 m/s. D) 48 m/s. E) none of the above
The type of nuclear reactor used in the United States was originally developed
A) during the Manhattan project. B) in Canada. C) as part of the H-bomb program. D) by private industry. E) for submarines.
Ehrenfeld (119) argues that nonresources should be conserved. By this he means that conservation cannot and should not rely on economic or ecological justifications
He thinks that each species on the Earth, evolved over millions of years, is natural art, and that a species lost is permanently gone. He asks: "What sort of change in the world view would favor the conservation of nonresources? Nothing less than a rejection of the heroic, Western ethic with its implicit denial of man's biological roots and evolved structure." Comment on Ehrenfeld's ideas.