Wednesday, March 25, 2015

Lab#6 Propagated uncertainty in measurements

1. Measuring the Density of Metal Cylinders


Purpose:
Materials:
Procedure:
  2. Measure the mass of three different metal cylinders and record the values.
  3. Use the measured values to determine the mass of them.
Materials:
Procedure:
  3. Use the measured values to determine the mass of the unknown mass.

  Calculate the density of some metal cylinders by measuring their height and diameter.

  Calipers
  scales
  metal cylinders

  1. Measure the height and the diameter of three different metal cylinders, then record the values.




  4. Use the known uncertainties to determine the propagated uncertainty in the calculated value of the density.



2. Determination of an unknown mass

Purpose:
  Find unknown mass and propagated uncertainty by measuring two forces and the angles between the force and horizontal.

  two clamps
  two spring scales
  elevation degrees
  objects with unknown mass

  1. Set up two clamps onto the edge of a lab table, with a long rob in each. suspend the two spring scales at asymmetric angles and hang the unknown mass on them.
  2. Measure the angles and record the scale readings.

  4. Use the known uncertainties to determine the propagated uncertainty in the calculated value of the mass.




Therefore,

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