Define ( 1 x5 )
a. Thermometer
b. Anemometer
c. Migration
d. Galvanisation
e. Indicator
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indicator
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thermometer:instrument for measuring and indicating temperature, typically one consisting of a narrow, hermetically sealed glass tube marked with graduations and having at one end a bulb containing mercury or alcohol which extends along the tube as it expands.
....Anemometer:
Anemometer, device for measuring the speed of airflow in the atmosphere, in wind tunnels, and in other gas-flow applications. ... Most widely used for wind-speed measurements is the revolving-cup electric anemometer, in which the revolving cups drive an electric generator.
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