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Which of the following measurements are not equivalent?

A. 84 cm = 8.4 mm
B. 24 dL = 2.4 L
C. 183 L = 0.183 kL
D. 25 mg = 0.025 g
E. 150 msec = 0.150 sec

Answer :

Final answer:

The incorrect measurement among the options given is 84 cm = 8.4 mm. The correct conversion is that 84 cm is equivalent to 840 mm.

Explanation:

The question involves identifying which of the given measurements are not equivalent. We need to be familiar with the conversion of units within the metric system to answer this question.

  1. 84 cm = 8.4 mm is incorrect because 84 cm is equivalent to 840 mm. The correct conversion for centimeters to millimeters is to multiply by 10.
  2. 24 dL = 2.4 L is correct because the prefix 'deci' in deciliters means 'tenth', so 24 deciliters is indeed 2.4 liters.
  3. 183 L = 0.183 kL is correct because the prefix 'kilo' in kiloliters means 'thousand', so 0.183 kiloliters is indeed 183 liters.
  4. 25 mg = 0.025 g is correct because there are 1000 milligrams in a gram; therefore, 25 milligrams is 0.025 grams.
  5. 150 msec = 0.150 sec is correct because the prefix 'milli' in milliseconds means 'thousandth', so 150 milliseconds is indeed 0.150 seconds.

The only incorrect measurement is option (a) 84 cm = 8.4 mm.

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