What does a breeder reactor "breed?"
A) more energy output than energy input
B) fissionable isotopes from a non-fissionable isotopes
C) more mass than it begins with
D) all of the above
E) none of the above
Answer: B
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Which of the following statements comparing halo stars to our Sun is not true?
A) Most stars in the halo have either died or are in their final stages of life, while the Sun is only in about the middle of its lifetime. B) Most stars in the halo have cooler surface temperatures than the Sun. C) Most stars in the halo are less luminous than the Sun. D) Most stars in the halo contain a much lower percentage of heavy elements than the Sun.
A 50-kg load is suspended from a steel wire of diameter 1.0 mm and length 11.2 m. By what distance will the wire stretch? Young's modulus for steel is 2.0 × 1011 Pa
A) 1.5 cm B) 2.5 cm C) 3.5 cm D) 4.5 cm
The speed of FM waves will be observed to be c = 2.9979 × 10^8 m/s when the antenna emitting the waves is
a. at rest relative to the receiving antenna. b. moving to the right of the detecting antenna at 0.5 c. c. moving to the left of the detecting antenna at 0.5 c. d. moving as described in (a), (b) or (c) above. e. moving at 2.9979 × 10^8 m/s.
If a car is traveling eastward and slowing down, what is the direction of the acceleration on the car that causes it to slow down? pan>
1.No acceleration is required to slow the car. 2.eastward 3.None of these choices is correct. 4.westward