Two Planets,A and B,are in Orbit Around the Same Star

question 33

Multiple Choice

Two planets,A and B,are in orbit around the same star.If A has a period of 12 days and an orbit radius of 1.63·10⁵ km,and B has a radius of 3.26·10⁵ km,what is the period of B in days?

• A)12·(1/2)^3/2
• B)12·(2)^3/2
• C)12·(1/2)^2/3
• D)12·(2)^2/3
• E)(1/2)^5/2/12

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Definitions:

Tay-Sachs Disease

A serious genetic disease in which abnormal lipid metabolism in the brain causes mental deterioration in affected infants and young children; inheritance pattern is autosomal recessive.

Autosomal Recessive

A mode of inheritance in which a trait or disorder is expressed in individuals who have two copies of a mutant gene on one of the non-sex chromosomes (autosomes).

Lipids

A broad group of naturally occurring molecules that include fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E, and K), monoglycerides, diglycerides, triglycerides, and phospholipids.

Hemophilia

A rare genetic disorder in which the blood's ability to clot is severely reduced, causing the patient to bleed severely from even a slight injury.