Viscometer
Anemometer
Spectroscope
Pyknometer
Answer is Wrong!
Answer is Right!
The answer is D. Pyknometer.
A viscometer is an instrument used to measure the viscosity of a fluid. An anemometer is an instrument used to measure wind speed. A spectroscope is an instrument used to study the spectrum of light emitted by a substance. A pyknometer is an instrument used to measure the density of a liquid or
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