# Repeat

• E.g.
• Measure the diameter d with a MSG at three different sections along the wire, and take average.
• Measure the time for 25 oscillations and calculate $T=\frac{{{t}_{1}}+{{t}_{2}}}{2\times 25}$
• Measure the mass of 50 sheets of paper M and calculate $m=\frac{M}{50}$