UNITS AND MEASUREMENTS

  1. Name the unit which is common in both mks and cgs system.

Ans – Unit of time i.e. Second is common in both mks and cgs system.

  1. Name two submultiples of the unit Kilogram.

Ans- Milli-gram, centi-gram.

  1. Name the instrument generally used to find the time interval between two events accurately.

Ans – Stopwatch

  1. What are the two fixed points in the Celsius scale?

Ans – The two fixed points in the Celsius scale are the 0oC and 100oC.

  1. What is the symbol of the unit Kelvin?

Ans – K

  1. What is a clinical thermometer?

Ans – A clinical thermometer is a thermometer used to measure the temperature of human body.

  1. What is approximation?

Ans – Approximation is a quick judgement about the measurement of a particular quantity. Approximation are used to make quick judgments when no tools are available or when there is not much time to measure. Approximation are made using the senses of sight, touch, hearing, taste or smell.

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