Why is off-planet migration unlikely to help Earth deal with overpopulation? Explain using examples
What will be an ideal response?
Population increase can overwhelm any emigration. The numbers of emigrants is
so small that there is little effect on the population sending the emigrants offplanet. One
example is the peopling of North America from Europe. Europe's population was barely
affected. Another example is peopling of South America from Europe as well. Many other
examples are possible—Australia, New Zealand, etc. had essentially no effect on Britain's
population.
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The dielectric strength of rutile is 6.0 × 10^6 V/m, which corresponds to the maximum electric field that the dielectric can sustain before breakdown. What is the maximum charge that a 10-10-F capacitor with a 0.50-mm thickness of Rutile can hold?
a. 0.30 mC c. 0.60 µC b. 6.0 C d. 1.7 nC
A 1.5 kg ball is floating in water. The volume displaced by the ball is
A. 0.0015 
B. 0.0027
C. 0.0036
D. 0.0040
E. 0.0051
Neutral hydrogen atoms are best studied from their energy given off as
A) 21-cm waves in the radio region. B) 0.2 nm as X-rays. C) 121.3 nm as Lyman alpha emission in the UV. D) red hydrogen alpha emission, at 656.3 nm. E) Neutral hydrogen gives off no detectable radiation, since it is cold, not hot.
Three different resistance lightbulbs are connected to a 120-V outlet. The most power will be consumed by the circuit
A. when the most resistive bulb is in parallel with a series of the other two. B. when the bulbs are in parallel. C. when the bulbs are in series. D. when the least resistive bulb is in parallel with a series of the other two. E. The arrangement is unimportant because the voltage is the same in all cases.