Calculate the precent error:
The density of an aluminum block determined in an experiment was 2.69 g/cm^3. (True value 2.70 g/cm^3.)
I keep getting
.37% ish
0.37% is correct.
Percentage error
=(observed value-correct value)/Correct value * 100%
= -0.01/2.7*100%
=-0.37%
.702
To calculate the percent error, you need to use the formula:
Percent Error = [(Measured Value - True Value) / True Value] x 100
In this case, the measured value is 2.69 g/cm^3 and the true value is 2.70 g/cm^3.
Substituting these values into the formula, we get:
Percent Error = [(2.69 g/cm^3 - 2.70 g/cm^3) / 2.70 g/cm^3] x 100
Simplifying the numerator, we have:
Percent Error = [-0.01 g/cm^3 / 2.70 g/cm^3] x 100
Dividing the two values and multiplying by 100, we get:
Percent Error = -0.0037 x 100
Percent Error = -0.37%
So, the percent error in this case is approximately -0.37%. It is negative because the measured value is slightly smaller than the true value.