Examlex
The latent heat of melting is the energy that is used to evaporate liquid.
Double Coincidence
Double Coincidence is a term used in economics to describe a situation where two parties each hold an item the other wants, allowing for an exchange without the need for a common medium of trade, like money.
Barter System
An ancient method of exchange where goods and services are traded directly for other goods and services without using money.
Trade
The exchange of goods, services, or both between two or more parties, either within a country or across international borders.
Commodity Money
Anything that serves both as money and as a commodity; money that has intrinsic value such as gold or silver coins.
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