Why Do Comets Have a Tail

question 5

Multiple Choice

Why do comets have a tail?

• A) they are balls of fire and the tail are flames that trail behind the comet
• B) they are balls of fire and the tail is smoke trailing from the burning comet
• C) solar wind strips off gas and dust, forming a tail pointing away from the Sun
• D) comets do not have a tail, but most dogs do

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Definitions:

Prisoners' Dilemma

A scenario in game theory where two individuals act in their own self-interest but would have been better off cooperating.

Collusive Outcome

A situation in which firms in a market or industry agree to set prices or output levels cooperatively, often leading to higher prices for consumers.

Maximin Strategy

A decision rule used in situations of uncertainty to maximize the minimum gain that can be secured.

Equilibrium

A state where market supply and demand balance each other, and, as a result, prices become stable.