A Spaceship Is Moving Away from an Asteroid with a Speed

question 5

Multiple Choice

A spaceship is moving away from an asteroid with a speed of 0.80c relative to the asteroid.The spaceship then fires a missile with a speed of 0.50c relative to the spaceship.What is the speed of the missile measured by astronauts on the asteroid if the missile is fired away from the asteroid?

• A)0.30c
• B)0.50c
• C)0.93c
• D)1.3c
• E)0.65c

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Definitions:

John Maynard Keynes

An influential British economist whose ideas fundamentally changed the theory and practice of macroeconomics and the economic policies of governments.

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The total amount of money that a government allocates and uses on public services and infrastructure.

Real GDP

The measure of a country's economic output adjusted for price changes (inflation or deflation), reflecting the actual value of goods and services produced.