To change mercury into gold, a pair of protons must be
A) removed from the mercury nucleus.
B) added to the mercury nucleus.
C) either of these
D) neither of these
Answer: D
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Which of the following statements pertaining to a vacuum flask (thermos) is NOT correct?
A. Silvering reduces radiation loss B. Vacuum reduces conduction loss C. Vacuum reduces convection loss D. Vacuum reduces radiation loss E. Glass walls reduce conduction loss
As a high-altitude balloon sinks lower and lower into the atmosphere it undergoes a decrease in
A) volume. B) density. C) weight. D) mass. E) none of the above
After an apple pie is taken from an oven, the pie filling is hotter than the crust due to
A) water in the filling that better retains thermal energy. B) uneven temperatures. C) high conductivity of apples.
The New Horizons space probe passed through the Pluto system in
A) 2008. B) 2012. C) 2015. D) 2016.