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Question
Life forms in the Precambrian includeA) trilobites, brachiopods and stromatolites.
B) cyanobacteria and trilobites.
C) the agnatha and the coelacanths.
D) stromatolites and certain primitive blue-green algae.
Answer
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Related questions
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Heat energy is measured in units of
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B) joules.
C) calories.
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A) decreases by 1/273.
B) decreases by 100/273.
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D) increases by 100/273.
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Which of these is the smallest?
A) 1 Celsius degree
B) 1 kelvin
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If water at 0C slightly increases in temperature, the water
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A kg of 40C water and a kg of 20C water, after being mixed, have a temperature of 30C. However, the final temperature of a 1-kg iron block at 40C placed into 1 kg of water at 20C is
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C) reaches equilibrium.
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When work is done by a system and heat is subtracted, the temperature of the system
A) increases.
B) decreases.
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Which law of thermodynamics addresses the direction of heat flow?
A) First law
B) Second law
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At some point between Earth and the Moon, the forces due to gravity on a space traveler would be the same when this point is
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Newton discovered
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