1 point
1. If we say the period of
oscillation of a simple
pendulum is 1.62 s, the digits 1
and 6 are reliable and certain,
while the digit 2 is *
sure
reliable
uncertain
оо
definite
Answers
Answer:
Correct answer
c) uncertain
The digit 2 is reliable
Therefore, option (2) is correct.
Explanation:
Given:
The oscillation of a simple pendulum is 1.62 s of which digits 1 and 6 are reliable and certain.
To find out:
What is digit 2
Solution:
The rules of reliability of any number depends upon whether that number is significant or not.
The number of reliable known digits and the first uncertain digit gives the number of significant digits
Rules of significant figures are:
1. Non-zero digits are always significant.
2. Any zeros between two significant digits are significant.
3. A final zero or trailing zeros are significant only in decimal portion
As per above rules
If digits 1 and 2 are significant
Then the digits lying in between them will also be significant
Therefore, digit 6 is significant
Thus, digit 6 is reliable.
Hope this answer is helpful.
Know More:
Q: Write the number of significant digits in the following (a) 1001 (b)100.1 (c) 100.10 (d) 0.001001
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