A Total Lunar Eclipse Can Last More Than an Hour

question 131

Multiple Choice

A total lunar eclipse can last more than an hour and a half,but a total solar eclipse never lasts more than 7 1/2 minutes.Why the difference?

• A) A total solar eclipse always occurs when the Moon is at perigee; it is moving fastest at that time.
• B) A total solar eclipse always occurs when Earth is at perihelion; it is moving fastest at that time.
• C) Both Earth and the Moon move clockwise in their orbits, as seen from the north. Thus, during a solar eclipse Earth and the Moon are moving in opposite directions, and during a lunar eclipse they are moving in the same direction.
• D) Earth's shadow at the Moon's distance is much larger than the Moon's shadow at Earth's distance. As Earth rotates, this narrow lunar shadow sweeps quickly over any given spot.

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Definitions:

Net Cash Inflows

The difference between all cash inflows and outflows within a given period, indicating a company's ability to generate cash.

Payback Period

The time it takes for an investment to generate an amount of income or cash equal to the cost of the investment.

Average Income

The mean amount of money earned over a specified period by an individual or entity.

Operations

The day-to-day activities involved in running a business or manufacturing process, focusing on efficiency and effectiveness.