Compared with protons, neutrons are more effective nuclear bullets in nuclear reactions since they have
A) slightly greater mass than a proton.
B) no charge.
C) a wider cross-section than a proton.
D) all of the above
E) none of the above
Answer: B
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a. straight down. b. down and inwards. c. down and outwards. d. down and backwards. e. down, inwards and backwards.
There is a solar eclipse of some kind every new moon
Indicate whether the statement is true or false
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Fill in the blank(s) with correct word
What is the escape speed from a planet of mass m and radius r if m = 3.2 × 1023 kg and r = 2.4 × 106 m?
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