Anonymous
Anonymous asked in Science & MathematicsChemistry · 1 month ago

# Which of the following measurements is precise?

57.7 mL or 57.68 mL and why?

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• 57.68 is more accurate than 57.7 , because as a decimal it goes intothe hundredths. '57.7' only goes into tenths.

• Anonymous
1 month ago

They're both precise, but the latter is more precise.

• fyi

.. (1) we can say a measurement is accurate if it agrees with an

.. .. . .accepted value

.. (2) we cannot say a measurement is "precise" without comparing it

.. . . . to something else

ie.

.. precision is a relative value not an absolute value like accuracy is.

***

.. 57.7 mL is precise to the 0.1's column

.. 57.68 mL is precise to the 0.01's column

since 0.01 is a higher precision than 0.1

.. 57.68 mL is more precise than 57.7 mL

**********

RTM,  counting is a measurement.  There is always error in measuring even things that are discrete.

LE Grant.. let's assume the numbers are +/- something in the right most digit and the rest of the digits are "TRUE".

Jim

.. 125101 has more sig figs than 0.1, but it's not as precise.

.. 125101.2 has more sig figs than 0.00009 but it's not as precise

• Neither is precise, because neither is counted.  They are both measured.

• what do you mean? do you mean MORE precise? because no measurement is perfectly precise.