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How can the number of significant figures in such a number be made clear?
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Explain me what are significant numbers?
Significant figures communicate how carefully a measurement is made. You could round it
How does the number bilion made?
A billion in numerical figures is 1000000000 in the UK. In the US it is 1000000
Which figure can be made from the 2 figures from brackets?
Depends on what figures are "from brackets".
What is the use of learning significant figures?
Significant figures are used often in science. The number of numbers in the answer informs us succinctly how well or how precisely we know an answer. Typically, a number with few significant figures reflects measurements made with cheap or imprecise equipment, while a larger number of significant figures indicates a more careful measurement using fancier (more precise) equipment. Measurement is always a compromise. You want the "best" numbers you can get, but you do not have infinite time nor infinite money to get that information. (An additional significant figure can cost ten times more than the previous one, and can take twice or more time to do the measurement.) The scientist's art lies in using instruments that are good enough to yield an answer that is accurate enough to decide the question (the hypothesis). You actually make decisions like this one every day. Say, for instance, you want to decide whether you can move your table from your kitchen to your bedroom. Question: is there enough space in your bedroom? First, you "eyeball" the table and the space. If there obviously is enough room, you move the table. But what if you don't know? Well, then you probably use your arms to guess the sizes. If you still can't decide, then you would go get the ruler or tape measure to decide once and for all. As you went through this process, you went from an imprecise measurement to ever more precise measurements, until you were able to decide. You did the easy measurement (eyeball) first because it takes the least time and it could have answered the question easily. The same concept applies to science. We do not automatically use the fanciest equipment we have - that would be a waste of time and money. Instead, we try to use the equipment that will give us a "good enough" answer quickly. The result of these measurements is summarized in the significant figures in our answer. For example, a beaker might be able to tell us that we have 25 mL. If that is as precise as we have to get then the beaker is OK. If, however, we need a more precise answer, we might use a graduated cylinder, which might give us 25.2 mL, or a buret, which might give us 25.18 mL, if we need to know the volume that precisely. Note the approximate volume (25 mL) is the same - the difference is that we know that volume more or less accurately, depending on our need. The beaker gave us 2 significant figures (because it is not very precise). The graduated cylinder gave us 3 significant figures, and the buret gave us 4 significant figures. (The graduated cylinder usually costs more and takes longer to read, and the buret costs still more and takes an even longer time to read.) So the answer is that we use significant figures as a shorthand way of telling each other how carefully we made the measurement. Generally 3 significant figures is a typical laboratory measurement, and 6 significant figures often reflects a research university measurement.
Which figure can be made from the two figures in brackets?
(x+y)
Explain me what are significant numbers?
Significant figures communicate how carefully a measurement is made. You could round it
How many significant figures are in the number 0.00321?
0.021 contains two significant figures. This indicates that an approximation has been made and the full number was, for example 0.0212. Note : This should not be confused with necessary and unnecessary zeros. The 0 immediately after the decimal point is a necessary zero. The zero in front of the decimal point is an unnecessary zero but is usually left in place in the absence of a whole number.
What do significant figures tell about an instrument?
They tell you what level of precision you can expect from measurements that are made using that instrument.
A student calculates the density of an unknown solid The mass is 10.04 grams and the volume is 8.21 cubic centimeters How many significant figures should appear in the final answer?
The general rule is that the final result should not be more accurate than the numbers used to obtain this final result. In the case of a multiplication or division, this means that the final result can't have more significant digits than the original numbers. One of the numbers has 4 significant figures, the other 3; therefore, the final result should be rounded to 3 significant figures. If more significant figures are quoted, a special note should be made that the last digits are uncertain.The general rule is that the final result should not be more accurate than the numbers used to obtain this final result. In the case of a multiplication or division, this means that the final result can't have more significant digits than the original numbers. One of the numbers has 4 significant figures, the other 3; therefore, the final result should be rounded to 3 significant figures. If more significant figures are quoted, a special note should be made that the last digits are uncertain.The general rule is that the final result should not be more accurate than the numbers used to obtain this final result. In the case of a multiplication or division, this means that the final result can't have more significant digits than the original numbers. One of the numbers has 4 significant figures, the other 3; therefore, the final result should be rounded to 3 significant figures. If more significant figures are quoted, a special note should be made that the last digits are uncertain.The general rule is that the final result should not be more accurate than the numbers used to obtain this final result. In the case of a multiplication or division, this means that the final result can't have more significant digits than the original numbers. One of the numbers has 4 significant figures, the other 3; therefore, the final result should be rounded to 3 significant figures. If more significant figures are quoted, a special note should be made that the last digits are uncertain.
When a calculation consists of several steps rounding should be made after each step to avoid accumulation of non-significant figures?
yes
How does the number bilion made?
A billion in numerical figures is 1000000000 in the UK. In the US it is 1000000
Why where Jesus Christ napoleon and Abraham Lincoln significant?
Napoleon and Abraham Lincoln were great figures in history, but Jesus Christ created them and made them great.
What types of figures are made by McFarland Figures?
McFarlane Figures made it's name creating figures based on movie, cartoon and video games. It has created figures from The Simpsons, Where The Wild Things Are and innumerable baseball and basketball stars.
What is the maximum amount in moles of P2O5 that can theoretically be made from 211 g of P 4 and excess oxygen Express your answer to three significant figures and include the appropriate units?
136/31 = 4.387 moles P /2 = 2.19355 moles P2O5
Which figure can be made from the 2 figures from brackets?
Depends on what figures are "from brackets".
Is 8.4 equal to 8.40?
Mathematically, yes, but in a science class there is something called significant figures which tries to represent the accuracy that is made in a measurement. So 4.80 means that a more accurate measurement was made than 4.8
What is the use of learning significant figures?
Significant figures are used often in science. The number of numbers in the answer informs us succinctly how well or how precisely we know an answer. Typically, a number with few significant figures reflects measurements made with cheap or imprecise equipment, while a larger number of significant figures indicates a more careful measurement using fancier (more precise) equipment. Measurement is always a compromise. You want the "best" numbers you can get, but you do not have infinite time nor infinite money to get that information. (An additional significant figure can cost ten times more than the previous one, and can take twice or more time to do the measurement.) The scientist's art lies in using instruments that are good enough to yield an answer that is accurate enough to decide the question (the hypothesis). You actually make decisions like this one every day. Say, for instance, you want to decide whether you can move your table from your kitchen to your bedroom. Question: is there enough space in your bedroom? First, you "eyeball" the table and the space. If there obviously is enough room, you move the table. But what if you don't know? Well, then you probably use your arms to guess the sizes. If you still can't decide, then you would go get the ruler or tape measure to decide once and for all. As you went through this process, you went from an imprecise measurement to ever more precise measurements, until you were able to decide. You did the easy measurement (eyeball) first because it takes the least time and it could have answered the question easily. The same concept applies to science. We do not automatically use the fanciest equipment we have - that would be a waste of time and money. Instead, we try to use the equipment that will give us a "good enough" answer quickly. The result of these measurements is summarized in the significant figures in our answer. For example, a beaker might be able to tell us that we have 25 mL. If that is as precise as we have to get then the beaker is OK. If, however, we need a more precise answer, we might use a graduated cylinder, which might give us 25.2 mL, or a buret, which might give us 25.18 mL, if we need to know the volume that precisely. Note the approximate volume (25 mL) is the same - the difference is that we know that volume more or less accurately, depending on our need. The beaker gave us 2 significant figures (because it is not very precise). The graduated cylinder gave us 3 significant figures, and the buret gave us 4 significant figures. (The graduated cylinder usually costs more and takes longer to read, and the buret costs still more and takes an even longer time to read.) So the answer is that we use significant figures as a shorthand way of telling each other how carefully we made the measurement. Generally 3 significant figures is a typical laboratory measurement, and 6 significant figures often reflects a research university measurement.
