Which Statement About the Dark Nebulae Is True

question 13

Multiple Choice

Which statement about the dark nebulae is true?

• A)Hydrogen and helium are the chief absorbing and scattering agents.
• B)They block the vast majority of radio waves from our Galaxy.
• C)They can be penetrated only with longer wavelengths such as radio and infrared.
• D)They comprise the majority of the mass of the Galaxy.
• E)They can be penetrated only with shorter waves, such as UV and X-ray.

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Definitions:

Cryotherapy

The use of extreme cold in medical therapy to treat a variety of tissue lesions and reduce pain and inflammation.

Muscle Spasm

Involuntary contraction of a muscle that can cause pain and interfere with function.

Nerve Conduction

The process by which electrical impulses are transmitted through the neurons in the nervous system.

Cold Therapy

A method of reducing pain and swelling by applying cold temperatures to the affected area.