Which of the following is calculated by dividing the ratio of exposed subjects to nonexposed subjects in the case group by the ratio of exposed subjects to nonexposed subjects in the control group?
What will be an ideal response?
Odds
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A temperature difference of 5 K is equal to
A. a difference of 9 on the Celsius scale. B. a difference of 9 on the Fahrenheit scale. C. a difference of 2.8 on the Rankine scale. D. a difference of 0.5 on the Fahrenheit scale. E. a difference of 2.8 on the Celsius scale.
Is it possible for heat to travel from a cold object to a hotter object?
What will be an ideal response?
The average speed of electrons flowing though the filament of a dc flashlight bulb is
A) about the same speed as sound in metals. B) dependent on how quickly electrons bumps into one another. C) the speed of light. D) 1000 cm/s. E) a snail's pace of less than 1 cm/s.
________ form when galaxies collide and ________.
A. Quasars; emit large amounts of heat and radio waves B. Starburst galaxies; star formation is triggered, making them very bright C. S0 galaxies; all their stars are destroyed D. Starburst galaxies; all their stars are destroyed