Spaceships a and B Are Moving in the Same Direction

question 24

Multiple Choice

Spaceships A and B are moving in the same direction. Spaceship A is moving at 0.80 c relative to a stationary observer, and spaceship B is moving at 0.80 c relative to spaceship A. What does the stationary observer find for the speed of spaceship B?

• A) 1.6 c
• B) 1.3 c
• C) 1.0 c
• D) 0.78 c
• E) 0.98 c

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Definitions:

Complements

Goods or services that are used together such that the demand for one increases when the price of the other decreases.

Demand

The quantity of a product or service that consumers are willing and able to purchase at various price levels, holding all else constant.

Inferior Goods

Goods for which demand tends to fall when income rises.

Incomes

Income is the financial gain, commonly acquired on a consistent basis, either from employment or investment returns.