Question

Which of the following measurements is most precise?
(a) 5.00 mm
(b) 5.00 cm
(c) 5.00 m
(d) 5.00 km.

Answer 1

Answer:5.00mm

Explanation:all given measurements are correct upto two decimal places. As here 5.00mm has the smallest unit and the error in 5.00mm is least,hence,5.00mm is most precise

Answer 2

Answer:

The correct option is (a) 5.00 mm

Explanation:

Reason :

• Since every measurements are approximately up to the same dp or decimal places.

• Next, we check the absolute error present in the measurement.

• Absolute error is also given by the LC or the least count and measured in their respective units.

• Measuring this it implies that 5.00 mm scale is in use here.

• Therefore, the LC or least count present is 0.01mm.

Therefore, 5.00mm measurement is the most precise one.

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