If density doubles and speed remains constant, how does flow rate change?

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Multiple Choice

If density doubles and speed remains constant, how does flow rate change?

Explanation:
Flow rate rises in direct proportion to density when speed stays the same. In traffic flow terms, flow rate q = density k × speed v. If the speed is constant and density doubles, the product doubles as well, so the flow rate doubles. Since only density changes and it doubles, the overall flow increases by a factor of two.

Flow rate rises in direct proportion to density when speed stays the same. In traffic flow terms, flow rate q = density k × speed v. If the speed is constant and density doubles, the product doubles as well, so the flow rate doubles. Since only density changes and it doubles, the overall flow increases by a factor of two.

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