The Speed of a Comet in an Elliptical Orbit About

question 50

Multiple Choice

The speed of a comet in an elliptical orbit about the sun:

• A)decreases while it is receding from the sun
• B)is constant
• C)is greatest when farthest from the sun
• D)varies sinusoidally with time
• E)equals L/(mr), where L is its angular momentum, m is its mass, and r is its distance from the sun

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Definitions:

Ecology

The branch of biology that studies the interactions among organisms and their environments, encompassing both biotic and abiotic components.

Trophic Level

The position an organism occupies in a food chain, categorized by the number of energy transfer steps from primary producers to top predators.

Habitat

Place where an organism lives and is able to survive and reproduce.

Per Capita Rate

A statistical measure that expresses the quantity of something per individual person within a population or area.