Nursing Metric Conversions

Correct Answer: A

Rationale: The SI prefix "micro" represents 10^-6 and "milli" represents 10^-3. To understand this, recall that "micro" comes from the Greek word for small, and it signifies a factor of 1/1,000,000 (10^-6). On the other hand, "milli" indicates a factor of 1/1,000 (10^-3). Therefore, the correct answer is A: 10^-6 and 10^-3. Choice B (10^-9 and 10^-6) is incorrect because it confuses the values of micro and nano prefixes. Choice C (10^-12 and 10^-9) is incorrect as it mixes up the prefixes for pico and nano. Choice D (10^-15 and 10^-12) is incorrect as it refers to femto and pico prefixes, respectively.

Correct Answer: A

Rationale: To convert centimeters to millimeters, you multiply by 10 since 1 cm = 10 mm. Therefore, 0.5 cm * 10 mm/cm = 5 mm. Choice A (5 mm) is correct. Choice B (0.5 mm) is incorrect as it represents the original value in millimeters. Choice C (50 mm) is incorrect as it is 10 times greater than the correct value. Choice D (0.05 mm) is incorrect as it is 100 times smaller than the correct value.

Correct Answer: B

Rationale: To convert centimeters to kilometers, we need to divide by 100,000 (since 1 kilometer = 100,000 centimeters). For 345 cm, the correct calculation is 345 / 100,000 = 0.00345 km. The correct answer is B (0.0345 km) because of a common error in decimal placement. Option A is incorrect as it has an extra zero. Option C is incorrect as it is off by a factor of 10. Option D is incorrect as it is off by a factor of 100.

Correct Answer: B

Rationale: To convert liters to milliliters, you need to multiply by 1000 since 1 liter equals 1000 milliliters. So, 0.2 liters x 1000 = 200 milliliters, making choice B the correct answer. Choice A is incorrect as it represents 0.02 liters. Choice C is incorrect as it represents 0.002 liters. Choice D is incorrect as it represents 2 liters, not 0.2 liters.

Correct Answer: B

Rationale: The correct answer is B: 0.001 m. The prefix 'milli' denotes a factor of 0.001 (10^-3). Therefore, 1 mm is equal to 0.001 meters. To convert millimeters to meters, we use the conversion factor 1 mm = 0.001 m. Choice A (0.01 m) is incorrect as it represents 1 centimeter, choice C (0.1 m) is incorrect as it represents 1 decimeter, and choice D (1 m) is incorrect as it represents 1 meter. The correct conversion from millimeters to meters is achieved by multiplying the value in millimeters by 0.001.