What does 'cm' stand for in the metric system?

Correct Answer: A

Rationale: In the metric system, 'cm' stands for centimeter, which is a unit of length equal to 1/100th of a meter. The correct answer is 'centimeter' (A). Choice B, 'cubic meter,' is a unit of volume, not length. Choice C, 'cord,' is not a standard metric unit. Choice D, 'centi,' is a prefix meaning one-hundredth, but 'cm' specifically stands for centimeter, not just the prefix.

Correct Answer: B

Rationale: In nursing, understanding metric conversions is crucial for accurate medication dosages, fluid measurements, and various medical procedures. In this question, the correct answer is B) 3,450 mm. To convert meters to millimeters, we need to remember that there are 1000 millimeters in 1 meter. So, to convert 3.45 meters to millimeters, we multiply 3.45 by 1000, giving us 3,450 mm. Option A) 345 mm is incorrect because it represents converting 0.345 meters to millimeters, not 3.45 meters. Option C) 345,000 mm is incorrect as it incorrectly multiplies 3.45 meters by 100,000 instead of 1,000. Option D) 3.45 mm is incorrect as it confuses the conversion factor by converting meters to centimeters instead of millimeters. Educationally, this question reinforces the importance of knowing and applying metric conversion factors accurately in nursing practice to ensure precise measurements and calculations, which are vital for patient safety and quality care. Mastering these conversions is a fundamental skill for all healthcare professionals.

Correct Answer: B

Rationale: To convert kilometers to meters, you need to multiply by 1,000 since there are 1,000 meters in 1 kilometer. Therefore, 0.345 km 1,000 = 345 meters. Choice A (3.45 m) is incorrect because it is the result of a mathematical error; the decimal point was misplaced. Choice C (345 cm) is incorrect as it represents centimeters, not meters. Choice D (345 m) is a duplicate of the correct answer B.

Correct Answer: B

Rationale: To convert kilograms to grams, you need to multiply by 1,000 since 1 kilogram is equal to 1,000 grams. Therefore, 0.0345 kg multiplied by 1,000 equals 34.5 grams. Choices A, C, and D are incorrect because they do not correctly convert kilograms to grams. A states 3.45 grams, which is off by a factor of 10. C and D overestimate the conversion by considering the decimal point in the original value as a whole number. Hence, the correct answer is B, 34.5 grams.

Correct Answer: B

Rationale: To convert millimeters to meters, you need to divide by 1,000 since there are 1,000 millimeters in a meter. Therefore, 3.54 mm · 1,000 = 0.00354 meters. Choice A (0.0354 m) is incorrect as it is 10 times the correct conversion. Choice C (35.4 m) is incorrect as it would be the equivalent of 35,400 millimeters. Choice D (0.035 m) is also incorrect as it is 100 times greater than the correct conversion.