When he does work on a cart in half the time, his power output is
A. twice.
B. half.
C. the same.
D. none of the above
Answer: A
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Does a rising parcel of air always expand? Why? Does this expansion cause the air temperature to increase or decrease? Why?
What will be an ideal response?
One important limitation when using potassium-argon for age-dating is that ________
A) potassium decays twice as fast as other isotopes B) potassium can only age-date rocks younger than 70,000 years old C) argon is a gas and may leak from minerals, throwing off measurements D) argon is unstable at surface conditions and easily weathered from rocks
Laughing gas, sometimes called nitrous oxide, has the formula N2O. What is the proper chemical name for nitrous oxide?
A) nitrogen oxide B) nitrogen dioxide C) dinitrogen oxide D) dinitrogen oxygen
The synthesis of unsaturated fatty acids from fatty acids is which type of reaction?
A) condensation B) hydrolysis C) oxidation D) reduction