During an equinox, the days and nights are of equal length except at the poles. Indicate whether the statement is true or false
true
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Discuss television as both an example and a diffuser of popular customs
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In passive solar units that heat water, the water moves because
A) flat-plate collectors are facing the sun. B) heated water rises up from low-positioned flat-plate collectors to the water tank. C) wind-powered pumps move the water through the system. D) an electric water pump moves the water through the system.
Which of the following is true of a chemical reaction?
A) In a chemical reaction, the number of moles of product always equals the number of moles of reactants. B) In a chemical reaction, the mass of the products always equals the mass of the starting materials that have reacted. C) Both a and b are true. D) Both a and b are false.