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MODERN PUBLICATION-UNITS AND MEASUREMENT-REVISION EXERCISES (VERY SHORT ANSWER QUESTIONS)
- 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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- A rectangle has an area equal to 7.654 cm^2. If its breadth is 2.3 cm,...
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- What is electron microscope ?
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- How many unified atomic mass units are there in one kg?
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- RADIOACTIVE DATING
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- What is an atomic clock? How does it work?
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- What is the accuracy of a cesium clock?
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- Express giga in terms of femto.
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- Define error in a measurement of any physical quantity.
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- Define random errors.
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- What is a systematic error ? How can it be removed ?
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- Instrumental error can be minimised by
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