The ultimate source of the energy in fossil fuels is
A) the sun
B) the Earth's internal heat
C) the energy of the plants and animals from which the fuel is formed
D) biomass
A
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The level of free convection:
A) is relevant only when discussing absolutely unstable air. B) occurs below the point where a rising air parcel is cooler than its surroundings. C) is unrelated to temperature of either the air parcel or its surroundings. D) is above the lifting condensation level.
Briefly explain how geologists can formulate theories about events that occurred on Earth before
humans were here to make observations. What will be an ideal response?
An intern made an error and gave a patient a dose of 500 mg rather than 500 mg of a drug. Which of the following is true?
A) The patient received an overdose by a factor of 1000. B) The patient received an overdose by a factor of 100. C) The patient received an underdose by a factor of 1000. D) The patient received an underdose by a factor of 100.
Which isotope of phosphorous is most likely to be a positron emitter?
A) 29P B) 30P C) 31P D) 32P