Convert 25 millimeters to centimeters.

Correct Answer: D

Rationale: To convert millimeters to centimeters, you need to divide by 10 because there are 10 millimeters in one centimeter. Therefore, 25 millimeters is equal to 25/10 = 2.5 centimeters, making choice D the correct answer. Choice A (250 cm) is incorrect as it incorrectly multiplies instead of dividing by 10. Choice B (25 cm) is also incorrect as it doesn't convert millimeters to centimeters. Choice C (2.5 mm) is incorrect as it provides the measurement in millimeters rather than centimeters.

Correct Answer: B

Rationale: To convert kilograms to grams, you need to multiply by 1000 since there are 1000 grams in 1 kilogram. Therefore, 0.5 kilograms is equal to 500 grams (0.5 x 1000 = 500). Choice A (50 grams) is incorrect as it is the result of multiplying by 10 instead of 1000. Choice C (5,000 grams) is incorrect as it is the result of adding an extra zero. Choice D (0.5 grams) is incorrect as it represents the original amount in grams, not the converted amount.

Correct Answer: B

Rationale: In nursing, understanding metric conversions is crucial for accurate medication dosing, fluid calculations, and other clinical tasks. In this question, the correct answer is B) 1.5 kg. To convert grams to kilograms, you need to divide by 1000 since there are 1000 grams in 1 kilogram. Explanation of options: A) 0.15 kg - This is incorrect because dividing 1500 grams by 1000 equals 1.5 kg, not 0.15 kg. C) 15 kg - This answer is incorrect as it is 10 times the correct answer, resulting from multiplying instead of dividing by 1000. D) 150 kg - This option is incorrect as it is 100 times the correct answer, indicating a miscalculation in conversion. Educational context: Understanding metric conversions is a fundamental nursing skill to ensure patient safety and precision in healthcare delivery. Nurses need to accurately convert between units to administer medications, calculate IV fluid rates, and interpret lab values. This question reinforces the importance of mastering basic math skills in the context of nursing practice.

Correct Answer: A

Rationale: The correct answer is A: 298.15 K. The conversion from Celsius to Kelvin is K = C + 273.15. Therefore, 25°C is equivalent to 298.15 K, as 25 + 273.15 = 298.15. Choice B, 273.15 K, is the freezing point of water in Kelvin, not the equivalent of 25°C. Choice C, 250 K, and Choice D, 25 K, are incorrect conversions and do not align with the correct formula for converting Celsius to Kelvin.

Correct Answer: A

Rationale: The prefix 'kilo-' in the metric system signifies a factor of 1000, which is equivalent to 10^3. Therefore, when using the prefix 'kilo-', it implies multiplying the base unit by 1000. For instance, one kilometer is equal to 1000 meters. Choices B, C, and D are incorrect as they do not accurately represent the factor associated with the prefix 'kilo-'.