WorksheetsUncertainty
Total questions: 15
Worksheet time: 15mins
Which of these measuring devices will have the most precise results?
Graduated cylinder
Beaker
Biuret
What is the average and uncertainty value of the data set below?
Average =
15.35 ±0.10
Average =
15.35 ±0.03
Average =
15.35 ±0.33
Average =
15.35 ±0.01
Which type of error would give the results shown here?
Random
Systematic
No errors seen
Determine the percent uncertainty of the digital pH meter
0.01%
0.1%
7%
99%
Determine the percent uncertainty of the graduated cylinder
0.8%
0.1%
7%
99%
Which shows a precise but not accurate aim?
Exp I
Exp II
Exp III
Exp IV
How many certain digits should the measurement of the pink bar have?
3
2
1
0
How many uncertain digits should the measurement of the pink bar have?
3
2
1
0
What is the principle of uncertainty in quantum mechanics known as?
Heisenberg Uncertainty Principle
Pauli Exclusion Principle
Schrödinger's Cat
Planck's Constant
Which of the following measurements has the greatest uncertainty?
12.3 ± 0.1
12.3 ± 0.01
12.3 ± 0.001
12.3 ± 0.0001
In an experiment, a student measures the length of a rod as 20.0 cm with an uncertainty of 0.2 cm. What is the percentage uncertainty?
1%
0.1%
10%
0.01%
If a scientist reports a measurement as 5.67×103 m with an uncertainty of 0.05×103 m , what is the relative uncertainty?
0.88%
0.88
0.0088%
8.8%
Which of the following best describes the concept of uncertainty in scientific measurements?
It is the exact value of a measurement.
It is the range within which the true value is expected to lie.
It is the error in the measurement.
It is the average of multiple measurements.
A balance measures the mass of an object as 250 g with an uncertainty of 5 g. What is the range of possible true values for the mass?
245 g to 255 g
240 g to 260 g
250 g to 255 g
245 g to 250 g
In a physics experiment, the time taken for a pendulum to complete one oscillation is measured as 2.0 s with an uncertainty of 0.1 s. What is the time period with its uncertainty?
2.0 ± 0.1 s
2.0 ± 0.01 s
2.0 ± 0.5 s
2.0 ± 0.05 s
