Ruler
Vernier caliper
Micrometer
Cylinder & displacement
Density
Timing
Practice
object length
73.5 mm
where it lies
0.0 mm
eye offset (parallax)
0 mm
line the object up with the ruler’s end
magnify the far end
jaw opening
17.30 mm
resolution
0.10 mm — 10 divisions over 9 mm
0.05 mm — 20 divisions over 19 mm
zero error
0.00 mm
Set a random opening
Show the reading
gap
7.36 mm
zero error
0.00 mm
Set a random gap
Show the reading
water before
45 cm³
object volume
18.0 cm³
eye height
level
lower the object in
magnify the meniscus
what you have
a rectangular block — measure it
an irregular lump — displace water
length
40.0 mm
width
30.0 mm
height
20.0 mm
displaced volume
24.0 cm³
mass on the balance
65 g
string length
60 cm
oscillations timed
10
your reaction time
200 ms
a millimetre ruler
1
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Answer
Check
Hint
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How to think about it
Common mistakes