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MODERN PUBLICATION-UNITS AND MEASUREMENT-REVISION EXERCISES (VERY SHORT ANSWER QUESTIONS)
- What is a physical quantity ?
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- Define unit vector.
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- What are fundamental units and derived units?
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- Mass of a body cannot be zero.
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- What is length? What is its SI unit?
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- Write the SI unit of luminous intensity and the amount of substance.
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- Write the SI unit of thermodynamic temperature.
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- How many electrons constitute current of one ampere ?
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- Define Chandraskhar limit.
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- How is one second measured?
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- What are different systems of unita used for measuring all kinds of ph...
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- Why are units required?
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- What is the smallest measured mass?
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- Why are SI units required?
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- Define one light year.
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- Define a Astronomical Unit.
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- What is parsec? (or) Define one parsec (parallactic second)
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- How many astronomical units make up one light year?
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- How many radians are there in one minute?
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- What is angular diameter of the sun and the moon as seen from earth?
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