What is latent heat?
What will be an ideal response?
Latent heat is "invisible" or "hidden" heat because it causes a change of state without a temperature change.
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Given the following generic chemical reaction, which is the product? X ? Y
A) Y is the product. B) X is the product. C) ? is the product. D) Both X and Y are the products. E) Both X and Y are the reactants.
For many of the less developed countries, what is the situation for their terms of trade?
A) exporting low-valued commodities and importing high-valued ones B) exporting low-valued commodities and importing low-valued ones C) exporting high-valued commodities and importing high-valued ones D) exporting high-valued commodities and importing low-valued ones E) several exports and no imports
A number of European countries have similar or even higher standards of living than the U.S. and consume less energy than Americans do.
Answer the following statement true (T) or false (F)
The largest known reservoir of hydrocarbons on Earth is ____
A) oil B) coal C) petroleum D) methane hydrate