Question

use the following information to answer the next question.
a doctor measures a dose of 5 ml of medicine for a child.

1. what is the uncertainty of the measurement?

a. 0.01 ml
b. 0.04 ml
c. 0.5 ml
d. 0.01 ml
use the following information to answer the next question.

1. what is the length of the black bar, including uncertainty?

a. 6.8 cm ± 0.1 cm
b. 6.5 cm ± 0.1 cm
c. 7 cm ± 0.5 cm
d. 6.5 cm ± 0.25 cm

1. the nominal value is defined as:

a. the maximum value of a measurement.
b. the target value for a measurement.
c. the range of possible values of a measurement.
d. the minimum value of a measurement.

Explanation:

• Question 5: In medical measurements, when a value like \(5\) mL is given without more specific precision details (e.g., using a more precise measuring device), the uncertainty is often half of the smallest increment. If we assume a basic measuring device where the smallest marked increment is \(1\) mL (for simplicity, as \(5\) mL is a whole - number value), the uncertainty is \(0.5\) mL.
• Question 6:
• Length measurement: The black bar starts at \(1\) cm and ends at approximately \(6.5\) cm. The length is \(6.5 - 1=5.5\) cm. But if we consider the scale (assuming each centimeter is divided into \(10\) parts, so each small division is \(0.1\) cm). The uncertainty is \(0.1\) cm.
• Question 7:
• Nominal value definition: The nominal value is the target value for a measurement. For example, if you are measuring the length of a rod that is supposed to be \(10\) cm (the target or nominal value), but due to measurement errors, you might get values around it.

Answer:

• Question 5: C. \(0.5\) mL
• Question 6: B. \(6.5\) cm \(\pm0.1\) cm
• Question 7: B. The target value for a measurement.