Nursing Metric Conversions

Correct Answer: B

Rationale: The correct formula to convert Fahrenheit to Celsius is C = (F - 32) x 5/9. To convert Fahrenheit to Celsius, you subtract 32 from the Fahrenheit temperature and then multiply by 5/9. This is because the freezing point of water is 32°F and 0°C, and the slope of the Fahrenheit to Celsius conversion is 5/9. Choice A (F = (C x 9/5) + 32) incorrectly reverses the formula for converting Celsius to Fahrenheit. Choice C (C = (F - 32) x 9/5) incorrectly uses the wrong multiplier. Choice D (F = (C + 32) x 5/9) incorrectly adds 32 before multiplying by 5/9.

Correct Answer: B

Rationale: The correct answer is B: derived units. Derived units are formed when base units are combined using mathematical operations. In the case of g/mL for density, grams (g) and milliliters (mL) are base units that are combined to express the derived unit of density. This combination involves division to represent the mass per unit volume. Therefore, derived units are the appropriate term for such combinations. Summary: A: Combined units is a vague term and does not specifically refer to the mathematical combination of base units. C: Base units refer to the fundamental units from which derived units are formed, but they are not the combination of base units. D: Calculated units do involve mathematical operations, but they do not specifically refer to the combination of base units to form derived units.

Correct Answer: B

Rationale: The correct answer is B: 1000 grams. This is because there are 1000 grams in one kilogram. The prefix "kilo-" signifies 1000 in the metric system. Therefore, when converting from kilograms to grams, we multiply by 1000. The other choices are incorrect because A (100 grams) is the conversion from decagrams to grams, C (500 grams) is not the correct conversion from kilograms, and D (2000 grams) is the equivalent of 2 kilograms, not 1 kilogram. Thus, B is the correct answer.

Correct Answer: B

Rationale: To convert 35.4 centimeters to kilometers, we need to divide by 100, as there are 100 centimeters in a meter and 1000 meters in a kilometer. Therefore, 35.4 cm ÷ 100 = 0.354 meters. To convert meters to kilometers, we divide by 1000, so 0.354 m ÷ 1000 = 0.000354 km, which is choice B. Choices A, C, and D are incorrect as they do not follow the correct conversion factor.

Correct Answer: A

Rationale: Certainly! The correct answer is A: 1760 yards in one mile. This is because there are 1760 yards in a mile, as defined by the international yard agreement. This conversion is widely accepted and used in various fields. Choices B, C, and D are incorrect as they do not align with the standard conversion of yards to a mile. B, C, and D do not accurately reflect the established measurement and would lead to incorrect calculations in real-world scenarios.