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प्रश्न
State whether true or false. If false, correct the statement.
In everyday life, we use the term weight instead of mass.
पर्याय
True
False
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उत्तर
In everyday life, we use the term weight instead of mass- True
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संबंधित प्रश्न
Name the instrument which is commonly used to measure the mass of a body. State how is it used?
Assertion(A): The scientifically correct expression is “ The mass of the bag is 10 kg”
Reason (R): In everyday life, we use the term weight instead of mass.
______ is used to measure mass.
Stop clock:: accurate time: _______:: accurate weight.
Mass:: Balance: Length:: ______.
Mass is ______.
Write a short note on the following:
Physical balance
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)
Since 2019, the kilogram has been redefined based on which fundamental physical constant?
Why was the kilogram redefined in 2019, and how is it measured now?
