How many number of significant figures are there in measurement 6.80?
I think 2
In measurement 43.52 cm what is digit is the most uncertain?
thanks
To determine the number of significant figures in a measurement, follow these rules:
1. All non-zero digits are significant. In the measurement 6.80, all three digits (6, 8, and 0) are non-zero, so they are all significant.
2. Zeroes between non-zero digits are also significant. In this case, the zero between 6 and 8 is significant.
3. Leading zeroes (zeroes to the left of the first non-zero digit) are not significant. In this case, the leading zero is not significant.
4. Trailing zeroes (zeroes to the right of the last non-zero digit) are significant only if there is a decimal point present. In the measurement 6.80, the trailing zero is significant since there is a decimal point.
Therefore, the measurement 6.80 has three significant figures.
Now, moving on to the second question:
In the measurement 43.52 cm, the digit that is the most uncertain is the last digit, which is 2. This is because the measurement is given to two decimal places (hundredths), and any digit beyond the uncertainty level is considered uncertain. Since the next smallest unit after hundredths is thousandths, the value of the digit 2 in the measurement 43.52 cm is the most uncertain.