The Leading Explanation for the Existence of Spiral Arms Are

question 76

Multiple Choice

The leading explanation for the existence of spiral arms are:

• A) shock waves from cyclic supernovae explosions.
• B) shock wave from the quasar-like eruption of the galactic core.
• C) passages of spiral density waves through the interstellar medium.
• D) passages of massive globular clusters through the galactic plane.
• E) tidal streams of small galaxies being torn up by our monster Galaxy.

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Definitions:

Demand-Pull Inflation

A sustained rise in the price level caused by a rightward shift of the aggregate demand curve.

Inflation Rate

The percentage rate at which the general level of prices for goods and services is rising, eroding purchasing power.

Standard of Living

A level of wealth, comfort, material goods, and necessities available to a certain socioeconomic class or a geographic area.

Real Prices

Prices that have been adjusted for inflation or deflation, reflecting the purchasing power of money in different time periods.