How many significant figures are in the measurement 0.020 km

Asked by admin @ in Biology viewed by 272 People

How many significant figures are in the measurement of 0.020 km?

a. 1 b. 2 c. 3 d. 4Please select the best answer from the choices providedTook the test subject is environmental science answer is B. 2

Answered by admin @


Answer: Option b) 2

Explanation:

  • Significant figures are the digits which play a role in defining a measurement that is they carry some meaning.
  • There are three essential rules to find out the significant figures in a given number:
  • Rule 1: Non-zero digits such are always significant.
  • Rule 2: The zeroes after a non-zero number in decimal are also significant. An example is if the number is 0.0500 then the zeroes after 5 are considered significant, however, the zeroes before 5 are not significant.
  • Rule 3: The zeroes placed between any two significant digits are also considered as significant e.g in 202 the zero is significant.
  • Therefore,  in the number 0.020 km, there are two significant digits, one is 2 and the other is the last zero placed after 2.


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