Nursing Metric Conversion

Correct Answer: B

Rationale: The correct answer is B: Powers of 10. The metric system is based on the concept of powers of 10, where each unit is a multiple or fraction of 10. This allows for easy conversion between units by simply moving the decimal point. Multiplication (A), addition (C), and subtraction (D) are not the foundational principles of the metric system. Multiplication is involved in converting between different metric units, but the fundamental concept is the use of powers of 10. Addition and subtraction are not directly related to the structure of the metric system.

Correct Answer: B

Rationale: The correct answer is B: 15 ml. A standard tablespoon is equivalent to 15 ml. This is a standard measurement in culinary and pharmaceutical fields. A tablespoon is commonly used for measuring liquid ingredients and medications. Choice A (10 ml) and Choice D (20 ml) are incorrect as they do not correspond to the standard measurement of a tablespoon. Choice C (5 ml) is also incorrect as it is too low to be the equivalent of a tablespoon. Therefore, B is the correct answer.

Correct Answer: A

Rationale: The correct answer is A: liter. In the metric system, 'L' stands for liter, which is a unit of volume. The liter is commonly used to measure liquid volumes. The other choices, B: log, C: link, and D: lever, do not represent units of measurement in the metric system. Log is a mathematical function, link is a unit of distance in surveying, and lever is a simple machine. Therefore, the correct answer is A: liter, as it is the only choice that corresponds to a valid unit of measurement in the metric system.

Correct Answer: A

Rationale: To convert liters to ounces, we need to know that 1 liter is approximately 33.814 ounces. Therefore, 0.5 liters is 0.5 x 33.814 = 16.907 ounces, which is rounded to 16.91 oz. Choice A is correct because it accurately represents the conversion. Choices B, C, and D are incorrect as they do not reflect the accurate conversion from liters to ounces.

Correct Answer: A

Rationale: The prefix kilo- in the metric system represents the factor of 10^3. Kilo- means one thousand, so when used in conjunction with a base unit, it signifies that the value is being multiplied by 1000. For example, 1 kilometer is equal to 1000 meters. Therefore, the correct answer is A: 10^3. Choice B (10^2) is incorrect because this factor corresponds to the prefix hecto-, not kilo-. Choice C (10^4) is incorrect as it does not align with the meaning of kilo-, which specifically denotes a factor of 10^3. Choice D (10^6) is incorrect as it represents the prefix mega-, which signifies a factor of 10^6.