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SL ARORA-Units and Measurements-Exercise
- Write the full name of the technique used in locating an under-water ...
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- How far away is the nearest star alpha centuri from earth ?
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- What is the size of out galaxy ?
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- Mean free path of a gas molecule is
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- What is the shortest distance measured indirectly so far ?
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- What is the estimated size of observable universe ?
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- Which unit is used for measuring nuclear area of cross-section ?
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- What does the word RADAR stand for ? Also define it.
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- What does the acronym SONAR stand for ?
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- What does the word LASER stand for ?
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- What is a laser ?
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- Express 1 light year in terms of metre. What is its order of magnitude...
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- What types of waves are used in a SONAR ?
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- Define atomic mass unit. Express it in kg.
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- Define international standard of mass.
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- Define atomic mass unit. Express it in g.
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- How many times larger is a kg then an mg ?
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- How may metric tone are there in a teragram?
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- What is the order of mass of an electron ?
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- What is mass of universe ?
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