When light undergoes refraction, there is a change in its
A. frequency.
B. wavelength.
C. both of these
D. neither
Answer: B
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Free convection is the mixing process related to:
A) buoyancy. B) conduction. C) subsidence. D) drying.
What amount of oil from U.S. production comes from the Gulf of Mexico?
A)10% B)30% C)50% D)65% E)100%
Despite widespread use of insecticides and herbicides, infestations of insects, plant pathogens, and weeds currently, depending on the type of crop, cause a loss of about
A) 0 to 5% of potential agricultural production in the United States. B) 20% to 50% of potential agricultural production in the United States. C) 50% to 80% of potential agricultural production in the United States. D) more than 95% of potential agricultural production in the United States.
What is the most important reason for poverty and environmental degradation?
What will be an ideal response?