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Contrast the progenitors of a type I and a type II supernova.
Inflation
The rate at which the general level of prices for goods and services is rising, leading to a decrease in the purchasing power of money.
Unemployment
The situation in which individuals who are capable of working and are looking for a job are unable to find employment.
Federal Debt
A stock variable that measures the net accumulation of annual federal deficits.
Stock Variable
A measure of a quantity at a particular point in time, contrasting with flow variables, which are measured over a period of time.
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