Nursing Metric Conversion

Correct Answer: A

Rationale: Step 1: Convert 0.25 mg to mcg: 0.25 mg * 1000 mcg/mg = 250 mcg Step 2: Compare the converted value (250 mcg) to 250 mcg. Step 3: Since the converted value matches 250 mcg, the statement "0.25 mg is equal to 250 mcg" is TRUE. Summary: - Option B (FALSE) is incorrect because the conversion shows they are equal. - Option C (Sometimes) doesn't apply as the conversion is a precise equivalence. - Option D (None of the above) is incorrect as option A is true based on the conversion.

Correct Answer: A

Rationale: To convert liters to milliliters, you need to multiply by 1000 since 1 liter equals 1000 milliliters. So, 0.5 liters * 1000 = 500 ml. Therefore, the correct answer is A: 500 ml. Choice B (50 ml) is incorrect as it is 10 times less than the correct answer. Choice C (5 ml) is incorrect as it is 100 times less, and choice D (0.5 ml) is incorrect as it is the original volume in milliliters, not the conversion from liters.

Correct Answer: A

Rationale: To convert 0.3 ml to tsp, we need to know that 1 ml is approximately 0.2 tsp. Therefore, 0.3 ml is 0.3 * 0.2 = 0.06 tsp. This is why choice A (0.06 tsp) is correct. Choices B, C, and D are incorrect because they do not follow the correct conversion ratio of 1 ml to 0.2 tsp. B is too high, C is double the correct answer, and D is the same as the original measurement in ml.

Correct Answer: A

Rationale: To convert Celsius to Kelvin, add 273.15. So, for 25°C, add 273.15 to get 298.15 K (Choice A). Choice B (273.15 K) is the freezing point of water in Kelvin, not the correct conversion for 25°C. Choices C (250 K) and D (25 K) are incorrect as they do not follow the correct conversion formula.

Correct Answer: B

Rationale: The correct answer is B: volume. Volume refers to the amount of space an object occupies in three dimensions. It is calculated by multiplying the length, width, and height of an object. Mass (A) is the amount of matter in an object, density (C) is the mass per unit volume, and area (D) is the measurement of the surface of an object in two dimensions. Therefore, volume is the most appropriate term for describing the amount of space an object occupies.