What Mechanisms Do Astronomers Believe Is Responsible for Making the Sun's

question 29

Multiple Choice

What mechanisms do astronomers believe is responsible for making the Sun's outer atmosphere so much hotter than its photosphere?

• A) stirring by comets, meteors, and other pieces of solid material being pulled in by the Sun's strong gravity
• B) light reflected back from the terrestrial planets
• C) the Sun's magnetic field interacting with the charged particles that make up the atmosphere
• D) the ionization of a new element called coronium
• E) astronomers really don't have even a guess about what heats the Sun's outermost layers

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Definitions:

Synchronous Speed

The rotation speed at which the magnetic field in the stator rotates in synchronous machines, typically equal to the AC supply frequency divided by the number of pole pairs.

Synchronous Motor

An AC motor that operates at a constant speed, set by the power supply frequency, and whose rotor is synchronized with the magnetic field of the stator.

Amortisseur Winding

A squirrel-cage winding on the rotor of a synchronous motor used for starting purposes only.

Phase Rotation Meter

A meter used to determine the rotation of a motor.