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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?
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What is the difference between an accurate and a precise measurement?
The article at the link below should help you get a handle on the subtle differences between accuracy and precision.
Why is it important to use units of measurement that are the same for everyone?
when one scientist tells another scientist that something is certain length, that measurement should mean the some thing to both of them.
Is it true theme statement should be precise?
yes
How many estimated digits are recorded as part of a measurement?
Your measurement should include one estimated digit.
What is a precise weight measurement?
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.
What is the difference between an accurate and a precise measurement?
The article at the link below should help you get a handle on the subtle differences between accuracy and precision.
What should be used to make a precise measurment of liquid volume?
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.
What should be done with the last bit of liquid remaining in the pipet after delivery?
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.
Is it true that an answer is as precise as the most precise measurement from which it was calculated?
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.
Should be used to make a precise measurement of liquid volume?
gradulated cylinder
How precise a measurement should be recorded when using the graduated cylinder?
the nearest .01 mL
What h of the following should be used to make a precise measurement of liquid volume?
Graduated cylinder
What are the two requirements of measurements?
( 1 ) Measurement should be accurate. ( 2 ) Measurement must have the correct units specified.
Why should the experimenter avoid using the end of a meter stick when making a measurement?
The end of a meter stick is less precise due to potential wear and tear, leading to inaccuracies in measurement. Using the end can also introduce parallax error when aligning with a measurement scale. It is advisable to use the edge or the start of the scale for more accurate and consistent measurements.
How should you place the edge of an metric pole with respect to the edge of an object in order to came accurate measurement?
Place the edge of the metric pole flush against the edge of the object to ensure an accurate measurement. This technique helps eliminate any gaps or overlaps that could result in an incorrect measurement. Additionally, make sure the pole is perpendicular to the object for the most precise measurement.
What instrument gives the same reading each time it makes the same measurement?
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.
When multiplying and diving measured quantities the number of significant figures in the result should be equal to the number of significant figures in?
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.
