Simple practice questions to get accustomed to significant numbers. This is important for all sciences. Attachments in PDF format.

Answer the following questions.
The answer is to be given to the appropriate significant figures.

a) 2.6 x 10 ^5 m + 2.1 x 10 ^ 3 km

b) The volume of the moon is 2.21x10^19 m2. What is the radius?

c) If there are 100 000 eletronic components on a semiconductor chip that measures 5.0 nm by 5.0 nm
     i) How much area does each component occupy?
     ii) If the individual components are square, how long is each on a side?