WorksheetsUncertainties and Deviations in Measurement
Total questions: 15
Worksheet time: 15mins
Five darts strike near the center of the target. Whoever threw the darts is
accurate
precise
both accurate and precise
neither accurate nor precise
Three measurements are made as 18.425 cm, 7.21 cm and 5.0 cm. The sum in correct significant figures should be written as
30.635 cm
30.64 cm
30.63 cm
30.6 cm
The image shown demonstrates...
High Accuracy & High Precision
Low Accuracy & High Precision
High Accuracy & Low Precision
Low Accuracy & Low Precision
The image shown demonstrates...
High Accuracy & High Precision
Low Accuracy & High Precision
High Accuracy & Low Precision
Low Accuracy & Low Precision
The accepted value is 15.63. Which correctly describes this students experimental data?
Trial 1: Measurement 12.84;
Trial 2: Measurement 13.02;
Trial 3: Measurement 12.96
accurate but not precise
precise but not accurate
both accurate and precise
neither accurate nor precise
The accepted value is 29.35. Which correctly describes this students experimental data?
Trial 1: Measurement 29.48;
Trial 2: Measurement 28.97;
Trial 3: Measurement 29.27
accurate but not precise
precise but not accurate
both accurate and precise
neither accurate nor precise
Which term quantifies the doubt that exists in any reported value of a measurement?
Precision
Accuracy
Error
Uncertainty
Which term describes how close the measured value is to the 'true value'?
Accuracy
Precision
Error
Uncertainty
What is error in the context of measurement?
The variability of measurement values.
The difference between the measured value and the 'true' value.
The net effect of uncertainty.
How close the measured value is to the 'true value'.
What does precision describe in measurement?
The doubt in the measured value.
The difference between the measured value and the 'true' value.
The variability or scatter of measurement values.
How close the measured value is to the 'true value'.
The following statements can affect the value of the uncertainty during measurement EXCEPT
quality of the measuring device
choice of units used for measurement.
skill of the experimenter to calibrate and
measure
the number of measurements made
Provide the range of values if a resistor is reported to have a resistance of 35 ohms ± 15%
29.75 ohms to 40.25 ohms
30.75 ohms to 41.25 ohms
29.25 ohms to 40.75 ohms
30.25 ohms to 41.75 ohms
What would be the speed of a car if it covered 2.90 km in 10 minutes? Express your
final answer in m/s and in correct significant figures.
Speed is calculated by dividing the distance covered by the unit time.
4.83 m/s
4.8 m/s
5.0 m/s
5 m/s
What is the speed of a car in the third reading (in m/s) if the first two readings are 55
km/h and 22 m/s and have an average speed of 25 m/s?
23.72 m/s
32.27 m/s
37.72 m/s
72.32 m/s
A material's density is defined as its mass per unit volume.
Identify the number of significant figures of seawater if its density is 1029 cm3g
2
3
4
5
