Examlex
Every experiment has one dependent variable.
Technology
Technology encompasses the collection of tools, machines, modifications, arrangements, and procedures used by humans to solve problems, perform tasks and achieve specific objectives.
Energy Input
The amount of energy required to produce a given level of output or to perform a specific task.
Replacement Rate
The total fertility rate necessary to offset deaths in a country and thereby keep the size of its population constant (without relying on immigration). For most countries, a total fertility rate of about 2.1 births per woman per lifetime.
Total Fertility Rate
The average number of children a woman would have over her lifetime, given current birth rates.
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