Several countries or cities have banned the use of thin plastic carrier bags because
A. the cost of plastic bags is high.
B. they cannot be recycled.
C. plastic bags plug sewers.
D. All of these statements are correct.
E. None of these statements is correct.
Answer: C
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A. no particular change in entropy. B. less entropy. C. greater entropy. D. none of the above
Compared to most stellar objects, quasars are more
A) distant. B) energetic. C) puzzling. D) all of these E) none of these
True or False: Each radioactive-decay scheme has its own time range of usefulness depending on the size of the half-life
Indicate whether this statement is true or false.
The tilt of Earth's axis to the plane of its orbit around the Sun
A) stays the same. B) varies about 2.5 degrees. C) is currently about 3 degrees. D) goes through one cycle of change about every 1.1 million years. E) has a major effect on Earth's eccentricity.