Advertisements
Advertisements
Question
The radius of the circle is 3.12 m. Calculate the area of the circle with regard to significant figures.
Advertisements
Solution
Given:
radius: 3.12 m (Three significant figures)
Solution:
Area of the circle = πr2 = 3.14 × (3.12 m)2 = 30.566
If the result is rounded off into three significant figure, area of the circle = 30.6 m2
APPEARS IN
RELATED QUESTIONS
What do you mean by significant figures?
How many significant figures are present in the 208?
How many significant figures are present in the 5005?
How many significant figures are present in the 2.0034?
The mean diameter of a thin brass rod is to be measured by vernier callipers. Why is a set of 100 measurements of the diameter expected to yield a more reliable estimate than a set of 5 measurements only?
A LASER is a source of very intense, monochromatic, and unidirectional beam of light. These properties of a laser light can be exploited to measure long distances. The distance of the Moon from the Earth has been already determined very precisely using a laser as a source of light. A laser light beamed at the Moon takes 2.56 s to return after reflection at the Moon’s surface. How much is the radius of the lunar orbit around the Earth?
State the number of significant figures in the following:
6.032 N m–2
Answer the following question.
Describe what is meant by order of magnitude.
Which of the following measurements contains exactly two significant figures?
The radius of Earth is expressed as 0.64 × 10⁷ m in scientific notation. What is its order of magnitude and number of significant figures?
