Solved conceptual questions on Measurement of First Year Physics
Q 1  Define the number π and show that 2π radians = 360° 
Q 2  Define the terms error, uncertainty, precision and accuracy in measurement. 
Q 3  Explain several repetitive phenomena occurring naturally which could serve reasonable time standard. 
Q 4  Why do we find it useful to have two units for the amount of substance, kilogram and mole? 
Q 5  Show that the famous Einstein equation E = mc^{2} is dimensionally consistent? 
Q 6  Deduce the dimensions of gravitational constant. 
Q 7  Find the dimensions of Kinetic Energy? 
Q 8  Give the drawbacks to use the period of a pendulum as time standard. 
Q 9  Are radian and steradian the base units? Justify your answer. 
Q 10  What does the word ‘micro’ signify in the words ‘microwave oven’? 
Q 11  Density of air is 1.2 kgm^{3}. Change it in gm cm^{3} 
Q 12  An old saying is that ‘A chain is only as strong as its weakest link’. What analogous statement can you make regarding measurement. 
Q 13  Differentiate between the following.

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