column a odometer column b 10cube6 nanosecond
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(A) Speedometer = An instrument on a vehicle's dashboard indicating its speed.
(B) Voltmeter = To measure potential difference between 2 points in a circuit.
(C) Sphygmomanometer = An instrument to measure blood pressure.
(D) Pyrometer = An instrument for measuring High temperature.
(E) Hydrometer = An instrument for measuring the density of liquids.
(F) Hygrometer = An instrument for measuring the humidity of the air or a gas
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