Significant figure
Your measurement should include one estimated digit.
Measurement error: obviously!
500
There need not be any estimated digit but, if there must be one, then it is the last digit: 3.
The significant figures in a measurement include all digits measured exactly, plus one estimated digit.
The number of digits in a measurement that you know with a certain degree of reliability is referred to as significant figures. Significant figures include all the known digits in a measurement plus one estimated digit, indicating the precision of the measurement. For example, if a measurement is recorded as 12.3, it has three significant figures, reflecting a reliable accuracy up to the tenths place. The more significant figures, the greater the confidence in the accuracy of the measurement.
The estimated digit in 42.50 g is the last digit, which is 0. The value is expressed to two decimal places, indicating that the measurement is precise to the hundredths place. Thus, the estimated digit reflects a level of uncertainty in the measurement, suggesting it could range from 42.495 g to 42.505 g.
False, one is estimated and three are known
An uncertain digit is a digit in a measurement that is estimated or not completely reliable, often due to limitations in the measuring instrument or the precision of the measurement.
0.503..the 3
Yes, but then there is no point in using an instrument that is that accurate!
The last digit in a measurement indicates the level of precision or uncertainty in the measurement. It is typically an estimate and can vary depending on the instrument's precision or the person taking the measurement. The other digits are considered to be more reliable and accurate in conveying the measurement value.