Because important decisions are often made on the basis of measurements.
Would you like your doctor to diagnose your illness on the basis of a very rough measure of you pulse / blood pressure / etc. Would you like your builder to build a house on approximate vertical angles? Or your car to be designed on rough calculations?
The article at the link below should help you get a handle on the subtle differences between accuracy and precision.
when one scientist tells another scientist that something is certain length, that measurement should mean the some thing to both of them.
yes
Precise measurement of weight refers to repeated measurements taken for the weight of an object, in which all the results are very close to one another. They could all be wrong by the same value.For example, suppose you have a pair of kitchen scales which show 100 grams when there is nothing on them. Suppose you weigh a single bag of flour several times. The results may be 601g, 600g, 601g, 602g, 599g. The results are all within 1 gram of 600 g indicating a high degree of precision. But a totally useless result since the result is not accurate: the true weight is 500 grams, and the zero error has displaced each measurement.Actually, the weights should be given in Newtons (or millinewtons), not grams, which is a unit for measuring mass, but for the sake of simplicity I have indulged myself.
Your measurement should include one estimated digit.
The article at the link below should help you get a handle on the subtle differences between accuracy and precision.
A graduated cylinder or a volumetric flask should be used to make a precise measurement of liquid volume. These tools have calibrated markings on the side that allow for accurate measurements to be made. It is important to ensure that the liquid level is read at eye level to minimize any parallax error.
The last bit of liquid in the pipette should be blown out gently to ensure accurate and precise delivery of the intended volume. Avoiding the introduction of air bubbles in the solution is important to maintain the accuracy of the measurement.
Yes, the precision of an answer depends on the precision of the measurements used in the calculation. The number of significant figures in the answer should match the least number of significant figures in the measurements.
gradulated cylinder
the nearest .01 mL
Graduated cylinder
( 1 ) Measurement should be accurate. ( 2 ) Measurement must have the correct units specified.
A properly calibrated instrument should give the same reading each time it makes the same measurement under the same conditions. This ensures accuracy and reliability in obtaining consistent data.
the measured quantity with the least number of significant figures. For example, if you multiply a quantity with 3 significant figures by a quantity with 2 significant figures, your result should have 2 significant figures.
Volume should be measured to accurately quantify the amount of a substance or material present. It is important for various applications, such as in cooking for recipe accuracy, in science experiments for precise calculations, in manufacturing for quality control, and in medical settings for medication dosing. Proper measurement of volume ensures consistency and reproducibility in processes.
We need standard unit for measurement to make our judgement more reliable and accurate. For proper dealing, measurement should be same for everybody. Hope this helped :>