Direct Measurement

Figure 1 :Steel ball and balance

Choose a spherical object and measure the volume of an iron ball using a traditional scale multiple times. Write the results in the following tables:

Questions :

1-Calculate the mean measured value. m ̅ = 27.92

2- Calculate the error mean absolute ∆m ̅ = 0.01

3- Calculate the mean squared uncertainty σ=0.017

4- Calculate the absolute uncertainty and relative ∆m= .....0.03 ...............∆m/m ̅ =0.00107

5 - Write the measured value in the fom : m= m ̅±∆m; ........m=27.92± 0.03