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In a vernier instrument the main scale is in 1/2 mm divisions .vernier is made by redividing 19 such divisions into 20 equal parts. calculate the least count of the instrument.
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The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?
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One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form
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Alorry with a mass of 5000kg accelerates to overtake a caravan on the motorway. its acceleration is...
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