Sputnik I was launched into orbit around Earth in 1957.It had a perigee (the closest approach to Earth,measured from Earth's center) of 
and an apogee (the furthest point from Earth's center) of 
.What was its speed when it was at its perigee? The mass of Earth is 
and G = 6.67 × 10-11 N • m2/kg2.
Definitions:
Physiological State
The condition of the body's internal biological functions and processes at a specific time.
Drive-reduction Theory
A motivational theory that posits that psychological needs create an aroused tension state (a drive) that motivates an organism to satisfy the need, thereby reducing the tension.
Nutritionally Poor
Describes food that lacks in essential nutrients needed for maintaining healthy bodily functions.
Unappetizing
Describes food that looks or tastes unattractive and does not stimulate the desire to eat.
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