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Which of the following best represents the speed of Halley's comet when it is nearest to Earth?
a.1 × 10^-5 kilometers per year
b.1 × 10^5 kilometers per year
c.1 × 10^-5 kilometers per hour
d.1 × 10^5 kilometers per hour

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Among the choices provided above the one that best represents the speed of Halley's comet when it is nearest to Earth is letter D which is 1 × 10^5 kilometers per hour. 

Answer:

d. [tex]1 \times 10^{5}[/tex] kilometers per hour

Explanation:

Halley's comet is named after the astronomer Halley. This comet entered the inner solar system from the Kupier's belt.  It is very large in size. It appears every 75 or 79 years in the inner solar system and can be seen with the naked eye. Its orbit is elliptical in shape. It reflects the sun light, otherwise it is entirely dark and made up of volatile material, as observed

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