SI units are set systematic international units, for measuring mass, time, and other base units and derived quantities.
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Physical Quantity
It is a quantity that can be measured. It consists of a numerical value and a unit.
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How can time intervals be measured?
Time intervals can be measured using a a stopwatch.
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What is the use of Micrometer Screw Gauge?
It is used to measure objects that are too small to be measured with vernier calipers.
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Define mass.
Mass is the measure of the amount of substance in an object.
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What is the SI unit of mass?
SI unit of mass is kilogram (kg).
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What is the SI unit of time?
SI unit of time is second (s).
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What is the SI unit of length?
SI unit of length is metre (m).
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What is the use of ruler?
They are used to measure small distances of a few centimetres (cm), with a precision of nearest millimetre (mm).
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What is the use of micrometer?
It is used to measure objects that are too small to be measured with vernier calipers.
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What is the use of vernier callipers?
It is a useful tool for measuring both internal and external diameters.
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Define Volume.
It is the quantity of space an object takes up.
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What is the SI unit of volume?
It's SI unit is cubic metre (m^3).
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Define Density.
It is the quantity of mass per unit volume of a substance.
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What is the formula and SI unit of density?
Formula is Density= Mass/Volume. Its SI unit is kilogram per cubic metre (kg m^-3).
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How to measure volume of an irregular object?
If the shape of the object is too awkward to calculate its volume, then immerse the object in a measuring cylinder filled with water and then calculate the increase in water level. This value will be the volume of the object.
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