Flour
Source: This question is taken from the Everyday Science
Speed of Air
All of these
Lens refractive power
Radioactivity
Weight
Depth
Wattmeter
Eratosthenes
Changes in the Earth’s Magnetic Field
Pressure
Barometer
Distance
Atmospheric Pressure
Lens
None OF These
Milk
Metre, litre and gramme
Blood glucose level
Wind Velocity
optical power
Electromagnetic radio wave frequencies
3
Hardness