14.A flare explodes on the surface of the Sun. It emits energy as X-rays, visibl

Question

14.A flare explodes on the surface of the Sun. It emits energy as X-rays, visible light, and radio waves. Which arrives at Earth, 150 million km away, first?

Select one:

A. X-rays

B. Visible light

C. They all arrive at the same time.

D. Radio waves

16.

Which of the following processes is a cause of the sunspot cycle?

Select one:

A. Small variations in the rate of nuclear energy generation in the solar interior

B. The winding of magnetic field lines due to the Sun's rotation

C. A slight gravitational contraction of the Sun

D. A large change in the amount of visible light emitted by the Sun

E. The Sun vibrates with an 11 year period

17.

The rotation of the Sun is

Select one:

A. fastest at the equator, slower at mid-latitudes, and slowest near the poles.

B. fastest at the equator, slowest at mid-latitudes, but spinning up to intermediate speeds around the poles.

C. fastest at mid-latitudes, slower at the equator, and slowest near the poles.

D. slowest at the equator, faster at mid-latitudes, and fastest near the poles.

25.

In March 1989, a solar storm caused a blackout in what part of the world?

Select one:

A. Australia

B. Pacific Northwest

C. Sweden

D. New England

E. Quebec, Canada

Explanation / Answer

14.C. They all arrive at the same time.

In perfect vaccum in free space they all travel at the same speed.

25.E. Quebec, Canada

Quebec, Canada faced an electrical power blackout In March 1989.

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