Q

1. The letter on the sidewall of a tire denoting the maximum speed for which it is designed (160 kph or 100mph).
2. A symbol for throughput.
3. A symbol for the quantity of water discharged, usually in m³s^-1.
4. A symbol of merit, often called the Q-factor, for an energy-storing device, resonant system, or tuned circuit.
5. A symbol for Charge.

Also see

• Speed rating

QAM

Acronym for Quadrature amplitude modulation

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