What happens to the half-life of a radioactive substance as we increase its temperature?
A) It does not change.
B) It increases.
C) It decreases at a constant rate.
D) It decreases at an exponential rate.
A
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When we fission the U-235 nucleus, the total rest-mass of all the resulting fragments of matter
A) is more than the mass of the original nucleus B) is the same as the mass of the original nucleus. C) is turned into broccoli. D) is less than the mass of the original nucleus. E) None of the above.
Explain why the term acceleration is important to the first postulate of special relativity
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Which of the following contributed to the gradual evolution of life via natural selection?
A) Organisms tend to produce more offspring than the local environment can support. B) Individuals in a population vary in many heritable traits. C) Individuals with traits that help them survive and reproduce are more likely to pass those traits on to succeeding generations. D) All of the above are correct.
A large car drags a small trailer in such a way that their common speed increases rapidly. Which tugs harder on the other?
A. The car tugs harder on the trailer than vice versa. B. The trailer tugs harder on the car than vice versa. C. Both tug equally on each other. D. The trailer exerts no force on the car at all. E. There is no way to tell.