Which of the following is NOT true?
A. A measurement contains significant figures and units.
B. All numbers should be recorded from a digital readout.
C. The uncertain digit is estimated between the last two markings.
D. If an average of 4 trials is being calculated the "4" is infinitely significant.
E. All of these are true.
I assume this is from an experiment you conducted BUT I don't know the details. Perhaps the following comments will help you decide.
A measurement DOES contain significant figures and units; the problem is that some of the numbers may NOT be significant. Therefore, this statement could be true or false depending upon the circumstances.
You know B is false since some of the numbers from a digital readout may not be significant.
What "last two markings"? It depends upon the experiment being performed.
D is true. The number 4 is a 4.0000000.
this is not from an experiment it is a prelab question that needs a simple answer which i don't know
In the answer to the question "Which of the following is NOT true? "
E All of these ARE true.
Because there are occasions where B may not be true and C depends on the experiment and the scale.
To determine which statement is NOT true, we need to evaluate each option:
A. A measurement contains significant figures and units.
This statement is generally true. A measurement typically includes both significant figures (digits that contribute to its accuracy) and units (such as meters, grams, seconds, etc.).
B. All numbers should be recorded from a digital readout.
This statement is NOT true. While digital readouts can provide precise measurements, it is not always necessary or feasible to record all numbers from a digital readout. Sometimes, other measuring devices with different levels of precision or accuracy are used, and it might be necessary to estimate or round the measurement.
C. The uncertain digit is estimated between the last two markings.
This statement is partially true. In some cases, the uncertain digit of a measurement can be estimated between the last two markings on a scale or device. However, this depends on the experiment and the specific scale being used. In other cases, the uncertainty might be estimated differently based on the markings or guidelines provided.
D. If an average of 4 trials is being calculated, the "4" is infinitely significant.
This statement is NOT true. In this context, the "4" refers to the number of trials conducted, not the significant figures of a measurement. The number of trials does not have inherent significant figures.
Since option B is the one that is NOT true, the correct answer is:
B. All numbers should be recorded from a digital readout.