1.Quadrant:
Quadrant is an instrument to measure altitudes and angles in navigation and astronomy.
2.Quartz clock:
Quartz clock is a highly accurate clock used in astronomical observations and other precision work.
3.Radar:
Radar is used for detecting and finding the range of moving objects by transmitting beams of radio waves.
4.Radio micrometer:
Radio micrometer is an instrument for measuring heat radiations.
5.Rain gauge:
Rain gauge is an instrument for measuring rainfall.
6.Refractometer:
Refractometer is an instrument used to measure the refractive index of a substance.
7.Resistance thermometer:
Resistance thermometer is used for determining the electrical resistance of conductor.
8.Saccharimeter:
Saccharimeter is an instrument for determining the amount of sugar in a solution.
9.Seismometer:
Seismometer is an instrument used for recording the intensity and origin of earthquake shocks.
10.Sextant:
Sextant is an instrument used for measurement of angular distances between two objects.
Quadrant is an instrument to measure altitudes and angles in navigation and astronomy.
2.Quartz clock:
Quartz clock is a highly accurate clock used in astronomical observations and other precision work.
3.Radar:
Radar is used for detecting and finding the range of moving objects by transmitting beams of radio waves.
4.Radio micrometer:
Radio micrometer is an instrument for measuring heat radiations.
5.Rain gauge:
Rain gauge is an instrument for measuring rainfall.
6.Refractometer:
Refractometer is an instrument used to measure the refractive index of a substance.
7.Resistance thermometer:
Resistance thermometer is used for determining the electrical resistance of conductor.
8.Saccharimeter:
Saccharimeter is an instrument for determining the amount of sugar in a solution.
9.Seismometer:
Seismometer is an instrument used for recording the intensity and origin of earthquake shocks.
10.Sextant:
Sextant is an instrument used for measurement of angular distances between two objects.
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