A photovoltaic cell receives energy input by
A) conduction.
B) convection.
C) radiation.
D) all of the above
Answer: C
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In electron capture,
A) a proton turns into a neutron B) a helium nucleus is ejected C) a proton turns into an electron D) a neutron turns into a proton
When a liquid freezes
A) the temperature of the substance increases. B) the temperature of the substance decreases. C) heat energy leaves the substance. D) heat energy enters the substance.
A wood block is placed on top of the ice in a large bowl half full of ice. The bowl is then filled to the brim with water, with the wood block riding on top of the ice. As the ice melts,
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