EXPERIMENT TWO

PRE LAB QUESTIONS

What is the smallest reading in cm from a

meter ruler? 0.01cm

vernier caliper? 1cm

micrometer caliper? 0.001cm

Which of the length measuring devices listed in the apparatus part should be used in measurement of

a human hair? micrometer screw gauge the instrument is suited for small lengths

the thickness of a piece of paper? micrometer screw gauge the instrument is used to measure gauge the instrument is suited for small lengths

the area of A4 size paper? Ruler the length and width can be determined and then the area calculated.

the length of a string used in a simple pendulum (about 1.2 m long)? metric ruler the length is in meters

diameter of a sphere? (about 2 cm). Vernier caliper the instruments is used to measure small lengths of about 0.2mm

You melted a copper cylinder of volume 10.0 cm’ to fabricate a thin long wire of diameter 0.02 mm. What is the length of your wire in meters? (Show your calculations)

volume of a cylinder =hπr2Diameter =0.002cm and therefore radius is 0.001cm

Radius squared =0.000001cm

Π=3.142

228600132080 H= volume

πr2= 10 cm3

3.142×0.000001

=3183098.86183cm