As a golf ball falls after rolling off the edge of a table, its vertical component of motion
A. remains constant.
B. increases.
C. cannot be analyzed.
D. decreases.
Answer: B
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An elevator does 1000 J of work in elevating it one floor in 20 s. The power used by the elevator is
A. 20 W B. 100 W C. 50 W D. 1000 W
Preserved records of prehistoric organic activity such as tracks, trails, burrows, and nests are called ____
a. trace fossils b. carbonizations
c. casts d. molds e. permineralizations
Which of the following is an accepted designation for the strand of DNA that is transcribed into RNA?
A) template strand B) (-) strand C) antisense strand D) all of these
New oil is born where ________.
A. there are continental swamps B. large animals, such as dinosaurs, once lived C. the Earth degases D. active plate subduction takes place E. dead organic matter is sealed in an oxygen-deprived burial