The Tully-Fisher Relation Is Much Like the Mass-Luminosity Relationship, Except

question 82

True/False

The Tully-Fisher relation is much like the mass-luminosity relationship, except that thegalaxy's rotation is used to find its mass; the greater the mass, the faster the rotation rate.

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Definitions:

Income Elasticity

A measure of how much the demand for a good or service changes in response to changes in consumer income.

Inferior Good

is a type of good whose demand decreases when the income of consumers increases, contrary to what is observed with normal goods.

Cross-price Elasticity

A measure of how the demand for one good responds to a change in the price of another good, indicating their substitutability or complementarity.

Complements

Goods or services that are used together, where an increase in demand for one leads to an increase in demand for the other.