Nursing Metric Conversions

Correct Answer: D

Rationale: The correct answer is D: Exact Equivalent. This term refers to a precise conversion between two different units of measurement without any approximation. In this case, 1 inch is exactly equal to 2.54 centimeters, making it an exact equivalent. A: Law of Conservation of Units - This choice is incorrect because it does not refer to the specific term used for the conversion between inches and centimeters. B: International Yard - This choice is incorrect as it does not accurately describe the relationship between inches and centimeters. C: Standard Conversion Factor - This choice is incorrect because it is a general term and does not specifically address the exact relationship between inches and centimeters.

Correct Answer: C

Rationale: The metric prefix Tera is abbreviated as T- and represents 10^12, which means 1 trillion. Tera is derived from the Greek word for "monster" or "giant." Therefore, the correct numerical value for Tera is 10^12. Choice A (10^6) is incorrect as it represents the metric prefix "Mega." Choice B (10^9) is incorrect as it represents the metric prefix "Giga." Choice D (10^3) is incorrect as it represents the metric prefix "Kilo."

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: A

Rationale: The correct answer is A: kilometer. In the metric system, 'km' stands for kilometer, which is a unit of length equal to 1000 meters. This is because the prefix 'kilo-' signifies a factor of 1000. Kilomole (B) is not a standard metric unit. Kilobyte (C) is a unit of digital information storage, not length. Knot (D) is a unit of speed typically used in maritime and aviation contexts, not length. Therefore, A is the correct choice for 'km' in the metric system.

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.