Measurement, Errors, Data and Unit Conversion
A volume of urine is measured to be 325 ml using a measuring cylinder with a scale of smallest interval 5 ml. What is the absolute error in the measurement?
ยฑ 0.5 ml
ยฑ 1 ml
ยฑ 2.5 ml
ยฑ 5 ml
ยฑ 2.5 ml
The absolute error is plus or minus half of the smallest scale interval (this means that the maximum error is this, but the actual error may be less). The interval is 5 ml, so 2.5 ml is half of this and equal to the absolute error.
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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 0.133โ120
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 ยฑ0.1 kg.
How many milligrams are there in 1 ฮผg?
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 ฮผg 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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