The Doppler Technique Can Be Used to Estimate the Semimajor

question 53

Multiple Choice

The Doppler technique can be used to estimate the semimajor axis of a planet's orbit by

• A)measuring the speed at which the star orbits the mutual center- of- mass of the star and planet, and using Newton's theory of gravity.
• B)measuring the amount by which the starlight is reduced when the planet transits.
• C)measuring the time it takes for the star's line- of- sight velocity to cycle from peak to peak, and using Newton's version of Kepler's Third law.
• D)measuring the asymmetries in the velocity curve.

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Definitions:

Digestive Enzymes

Biological catalysts that break down foods into their chemical components, making nutrients available for absorption.

Mucus

A thick, slippery secretion produced by mucous membranes, serving to protect and lubricate surfaces within the body.

Stomach pH

The level of acidity in the stomach, typically ranging from 1.5 to 3.5, which is crucial for digestion and destroying pathogens.

Pepsin

Principal digestive enzyme of the gastric juice, formed from pepsinogen; digests proteins into smaller peptide chains.