Ultraviolet energy is light at wavelengths that are shorter than the range of human vision, and near-infrared energy is energy at wavelength just longer than human eyes can see
Indicate whether the statement is true or false
T
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Which of the following forms of spatial diffusion can be identified in the growth of Christianity?
A. hierarchical diffusion B. expansion diffusion C. relocation diffusion D. all of these E. none of these
The first capital of Brazil was
A. Rio de Janeiro B. Sao Paulo C. Salvador D. Recife
Salmon spawn in seawater and Atlantic eels spawn in fresh water.
Answer the following statement true (T) or false (F)
Ordinary hydrogen is sometimes called a perfect fuel, because of its almost unlimited supply on Earth, and when it burns, harmless water is the product of the combustion
So why don't we abandon fission energy and fusion energy, not to mention fossil-fuel energy, and just use hydrogen? A) The oil companies have lobbied the federal government to continue fossil fuel usage because it would mean huge profit losses for all the major oil conglomerates. B) The conversion of current energy consuming vehicles and other machinery to hydrogen, although simple, is going to be very costly to the consumer and difficult to legislate. C) The political, economic, and corporate pressures being exerted to oppose abandoning the other energy sources are the only obstacles to moving to the use of hydrogen as the nation's primary energy source. D) Hydrogen represents a viable solution for stored energy but not as a general energy source since obtaining the hydrogen from water requires more energy than is produced when you burn it.