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प्रश्न
Tick the most appropriate answer.
Which of the following devices is used to measure mass?
विकल्प
Ruler
Measuring cylinder
Beam balance
Stopwatch
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उत्तर
Beam balance
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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 instrument which is commonly used to measure the mass of a body. State how is it used?
Name the device commonly used to measure weight of a body.
On the moon, the gravitational force is greater than on earth.
Mass:: Balance: Length:: ______.
Mass is a ______ quantity.
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)
Give an example of a constant which has a unit.
Since 2019, the kilogram has been redefined based on which fundamental physical constant?
Why is carbon-12 chosen as the standard for defining the amu?
