Experiment 02

MEASUREMENT

PROCEDURE

A. Measurements with Meter Stick

1.    Open up the Meas-Workbook and fill in the header information.

2.    Examine the meter stick to see that the ends are not damaged and that scale readings are visible. Select a zero mark from which to make all measurements and record this value in cell F7 on the Worksheet.

3.    Measure the length and diameter of each of the metal cylinders that are supplied. Be sure to place the meter stick as illustrated in Figure 02-3. Measure from your zero mark and record values of the end markand the lengthand diameteron the Worksheet. Each measurement can be made to an accuracy of about 0.02 cm by estimating fractional parts of a millimeter. Enter this value for uncertainty on the Worksheet in cell K7.

4.    Make three measurements of diameter and length for each cylinder and enter these in the table in cells C12 through G26 on the Worksheet.

B. Measurements with Triple Beam Balance 1.    Check the zero error of the triple beam balance and record the empty value in grams in cell D31 on the Worksheet.

2.    Determine the Least Count for the balance (in grams) and enter this value just below the Instrument Zero, in cell D32 on the Worksheet. Measurement uncertainty is taken to be one-half the least count of the instrument. This value will automatically appear on the Worksheet in cell D33 when you enter the least count.

3.    Measure and record the mass of each cylinder three times in cells C38 through D52. The uncertainty in each mass measurement is a constant that will automatically appear in the appropriate cells.
 

C. Measurements with Vernier and Micrometer Calipers  
1.    Check the zero error of each instrument, and record these values in cells D82 and H82 on the Worksheet.

2.     Determine the least count of each instrument and record this in cells D83 and H83 on the Worksheet. The Reading Uncertainty will be taken to be one-half these values, and is automatically entered in cells D84 and H84.

3.     Measure the length of each cylinder three times using the vernier caliper, and measure the diameter of each cylinder three times using the micrometer. Record these values in cells C90 through G104 on the Worksheet. The uncertainties in the vernier and the micrometer measurements are constant for each instrument, and will automatically appear in the appropriate cells.

4.    Obtain a printout of the Worksheet and take it home to complete your lab report.