How do solar thermal generators work?
A)
They block high-angle sunlight but allow the penetra...
How do solar thermal generators work?
A)
They block high-angle sunlight but allow the penetration of low-angle sunlight.
B)
They use electric pumps to circulate air, water, and other fluids to places where heat is stored and then pumped to where energy is used.
C)
They use flat glass-covered plates over a black background which takes in solar radation and emits heat.
D)
They use solar cells to convert sunlight directly into electricity.
E)
They use sunlight to boil water and run steam-driven systems.
Answers: 3
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Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.
Answers: 1
Biology, 22.06.2019 18:00
This diagram shows how seed plants are grouped. which is the missing label? bryophytes angiosperms pteridophytes monocots
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