A crate is at rest on a horizontal floor. The friction force acting on the crate is
A. between zero and the weight of the crate.
B. equal to the weight of the crate.
C. zero.
D. none of the above
Answer: C
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Sewage treatment plants often use the same denitrification process that occurs in soils and bodies of water. The process of denitrification involves ________
A) the conversion of atmospheric nitrogen to reactive nitrogen B) the removal of oxygen from sewage C) the bubbling of oxygen into sewage D) the conversion of reactive nitrogen into unreactive nitrogen
________ describes the total sediment load transported by a stream.
a. Capacity b. Discharge c. Hydro-load factor d. Competence
The world's largest continuous expanse of tropical rainforest lies in the basin of the __________ river system, and is the world's largest storehouse of plant and animal species, the majority of which have not yet been discovered or documented
Fill in the blank(s) with correct word
The solstice only occurs once a year
a. True b. False Indicate whether the statement is true or false