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The best unit for measuring the length of a pencil is inches.
hydrometer
That depends on which aspect of the cube you are measuring and the size of the cube.. If you are measuring the dimensions, you might use meters. If you are measuring the surface area, you might use square meters. If you are measuring the volume, you might use cubic meters.
Grams per cubic centimetre for its density, A gram, for its mass, A millimetre for its side length, A millilitre for its volume, and lots more possibilities depending on what aspect of the die you want to measure.
Either a meter stick or a metric tape.
Only if that volume is contained in a rectangular prism.
A measuring tape should work well in most cases.
The best units would be millimetres for the length measurements and millilitres for the volume.
A measuring beaker.
The best unit for measuring the length of a pencil is inches.
I would measure its length in inches, its weight in ounces, and its screen brightness in lumens.
A millimetre.
meters
centimetres
i dont know the instrument but i know experiment ..... take volumetric flask full with water insert subject below water level the displacement of level in volume is the volume of that subject.... By Archimedes principle
what is the most suitable unit to measure the length of a car key
hydrometer