Drivers were informed of the requirement to use their headlights on the test road by means of a series of three conspicuous signs in each direction of travel.
Under certain conditions, among them fog and heavy rain, most drivers in California already use their headlights during the daytime.
Full-scale application of the daytime rule would cause headlight bulbs to burn out sooner than they currently do and thus to require more frequent replacement.
The test road was selected to include a great variety of the sorts of road conditions that drivers in California are likely to encounter.
10. Which of the following, if true, most logically completes the passage?
Every fusion reaction releases neutrinos. To test a hypothesis about the frequency of fusion reactions in the Sun, physicists calculated the number of neutrinos the Sun would produce annually if the hypothesis were correct. From this they estimated how many neutrinos should pass through a particular location on Earth. The fact that far fewer neutrinos were counted than were predicted to pass through the location would seem to prove that the hypothesis is wrong, except that------.
the physicists, using a different method for estimating how many neutrinos should reach the location, confirmed their original estimate
there are several competing hypotheses about the frequency of solar fusion reactions
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