Measurement, Errors, Data and Unit Conversion
A baby’s mass measurement is 3.8 kg ± 0.05 kg. What is the absolute error in the measurement?
± 0.05 ÷ 3.8
± (0.05 ÷ 3.8) × 100%
± 0.05 kg
0.05 kg
± 0.05 kg
By definition, absolute error is half the smallest scale interval (0.1 in this case) above and below the measured value.
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Given that 1 mmHg = 0.133 kPa, how can a systolic BP measurement of 120 mmHg be converted to a measurement in kPa?A. Divide 120 by 0.133
B. Multiply 120 by 0.133
C. Divide 0.133 by 120
D. Add 0.133–120
How many micrograms are there in 0.25 g?
A. 250
B. 25,000
C. 250,000
D. 25,000,000
What is meant when a person’s mass is stated as 73.6 kg? That:
A. The mass is closer to 73.6 than it is to 73.7 or 73.5.
B. The mass is closer to 73.6 than to any other value.
C. The mass is between 73.5 and 73.7.
D. The mass is 73.6 ±0.1 kg.
How many milligrams are there in 1 μg?
A. 0.001
B. 1000
C. 0.1
D. 1000 000
How many micrograms are there in 1 mg?
A. 0.001
B. 0.1
C. 100
D. 1000
What is the result of converting 650 μg to mg?
A. 0.650
B. 6.50
C. 65
D. 65,000
What is 1.25 g converted to micrograms?
A. 125
B. 1250
C. 12,500
D. 1,250,000
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