1
Q
Vernier Callipers
A
10⁻⁴m
2
Q
Screw Gauge/ Spherometer
A
10⁻⁵m
3
Q
Metre Scale
A
10⁻³m - 10²m
4
Q
1° into rad.
A
1.74 x 10⁻² rad
5
Q
1’ into rad.
A
2.91 X 10⁻⁴ rad
6
Q
1” into rad.
A
4.85 X 10⁻⁶ rad
7
Q
1 fermi (1 f)
A
10⁻¹⁵m
8
Q
1 angstrom (1 A°)
A
10⁻¹⁰m
9
Q
1 Astronomical Unit (1 AU)
A
1.496 X 10¹¹m
Avg. distance between earth and sun.
10
Q
1 Light Year (1 ly)
A
9.46 X 10¹⁵m
Distance travelled by light in a year.
11
Q
Parsec
A
3.08 X 10¹⁶m
Distance at which average radius of Earths orbit subtends an angle of 1 arc second.
12
Q
Accuracy
A
How close a measured value is to its true value.
13
Q
Precision
A
Tells us the resolution of a measured quantity.
Grade 11 Physics
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