The point of this questions is to practice the concept of precision and the number of significant
figure to quote. Questions are taken from the course book 'Physics with modern physics',
Richard Wolfson & J. M. Pasachoff, pp 18-20.
Question: Add 2.6 × 10 5 m and 2.1 × 10 3 km.
Physics Homework Solutions
#1372
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?
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