Nuclear Binding Energy: One of the fusion reactions that occurs in the sun is:
The following atomic masses are known:
What is the reaction energy released in this fusion reaction? (1 u = 931.5 MeV/c2)
A. 11 MeV
B. 13 MeV
C. 15 MeV
D. 17 MeV
E. 19 MeV
Answer: B
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What is the minimum x-ray wavelength produced when electrons are accelerated through a potential of 46,800 V? (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s, and 1 eV = 1.60 × 10^?19 J)
a. 4.25E–11 m b. 8.85E–12 m c. 4.01E–12 m d. 2.66E–11 m e. 6.80E–11 m
The Universe has____
a. an edge, does not have a center, and is finite b. no edge, does not have a center, and is finite c. an edge, has a center, and is finite d. an edge, has a center, and is infinite e. no edge, does not have a center, and is infinite
When a train makes a curve, a tapered wheel rim is able to
A) cover different distances per revolution. B) maintain a fixed rotational speed. C) reduce differences in angular speeds.
Why do scientists say that evolution is a "theory"?
A) because it explains a great deal about life and is supported by an enormous body of evidence B) because they are not very confident that it really happened C) because it is supported by only a small amount of evidence D) because it's really just a guess about how life developed on Earth