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प्रश्न
Define mass.
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उत्तर
Mass is the measure of the amount of matter in an object. It is a fundamental property of matter and does not change with location or the object’s state.
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संबंधित प्रश्न
Just as precise measurements are necessary in science, it is equally important to be able to make rough estimates of quantities using rudimentary ideas and common observations. Think of ways by which you can estimate the following (where an estimate is difficult to obtain, try to get an upper bound on the quantity):
Name the device commonly used to measure mass.
We can say that mass of an object is 126 kg.
Name any one instrument used for measuring mass.
State whether true or false. If false, correct the statement.
In everyday life, we use the term weight instead of mass.
State whether true or false. If false, correct the statement.
A physical balance is more sensitive than a beam balance.
Leaves and pieces of paper are heavier things.
Stop clock:: accurate time: _______:: accurate weight.
If Planck’s constant (h) and speed of light in vacuum (c) are taken as two fundamental quantities, which one of the following can, in addition, be taken to express length, mass and time in terms of the three chosen fundamental quantities?
- Mass of electron (me)
- Universal gravitational constant (G)
- Charge of electron (e)
- Mass of proton (mp)
Name the device used for measuring the mass of atoms and molecules.
