abi.ayan said:Can't we make an instrument free of error?
abi.ayan said:can anyone explain why is that noted?Most of them says that it denotes the error.why there should be an error in the instrument.Can't we make an instrument free of error?confused.
The "+/- 5" on a measuring cylinder refers to the margin of error in the measurement. This means that the measurement may vary by up to 5 units in either direction from the marked measurement on the cylinder.
The "+/- 5" indicates the precision of the measurement. This means that the actual value may be within 5 units of the marked measurement on the cylinder. Therefore, the larger the "+/-" value, the less accurate the measurement will be.
No, the "+/- 5" should not be ignored regardless of the volume being measured. Even when measuring small volumes, the margin of error can still affect the accuracy of the measurement.
If the measurement falls between two markings on the cylinder, it is best to estimate to the nearest tenth or hundredth, depending on the precision of the cylinder. For example, if the cylinder is marked in milliliters, estimate to the nearest tenth, and if it is marked in microliters, estimate to the nearest hundredth.
The accuracy of the measurement can be improved by using a cylinder with a smaller margin of error, such as a "+/- 2" or "+/- 1" cylinder. Additionally, taking multiple measurements and calculating the average can also improve the accuracy.