When We See That a Spectral Line of a Galaxy

question 19

Multiple Choice

When we see that a spectral line of a galaxy is broadened,that is,spanning a range of wavelengths,we conclude that

• A)we do not have very good resolution of a star's orbital velocity.
• B)there are many stars traveling at extremely high orbital velocities.
• C)there are different Doppler shifts among the individual stars in the galaxy.
• D)we are actually measuring the orbital velocity of a cloud of atomic gas.
• E)we are actually measuring the orbital velocity of dark matter.

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Definitions:

Performance Measurement Systems

Tools and systems used to monitor and assess the performance of an organization against its objectives, often encompassing multiple performance indicators.

Current Performance

An assessment of the present operational, financial, or market status of an entity, often used to gauge its short-term success or effectiveness.

Material Price Variances

The difference between the actual cost of direct materials and the standard cost, multiplied by the quantity of materials purchased.

Purchasing Department

A division within a company that is responsible for procuring goods and services necessary for the company’s operations.