Define the term significant figures.

What is the number of significant figures in 0.0026?

What is the number of significant figures in 9.984?

Express the Avogadro's number (6·023×10²³) upto three significant figures.

What is the result of (5.472 - 1.12) to the appropriate number of signficant figures?

Express 0.0468 in scientific notation.

What does SI units stand for?

What is the relation between temperature in Kelvin (K) and temperature on centigrade scale?

9.

What is the unit of force in SI units?

The popular unit of pressure is atmosphere, how is it related to pascal?