The Period-Luminosity Relation for Cepheid Variables Was Discovered in 1908

question 79

Multiple Choice

The period-luminosity relation for Cepheid variables was discovered in 1908 by:

• A)William Herschel.
• B)Henrietta Leavitt.
• C)Harlow Shapley.
• D)Heber Curtiss.
• E)Edwin Hubble.

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Definitions:

Nasogastric Tube

A medical tube that is inserted through the nose and down into the stomach for feeding or medication administration.

Xiphoid Process

The smallest and lowest part of the sternum (breastbone) that may be felt as a small lump at the lower end of the sternum.

Total Parenteral Nutrition

A method of feeding that bypasses the gastrointestinal tract, delivering nutrients directly into the bloodstream through an intravenous line.

Enteral Feeding

A method of providing nutrition to individuals who cannot obtain nutrition by mouth, using a tube to deliver nutrients directly to the stomach or small intestine.