Measurement (1) Flashcards
1
Q
Physical quantity
A
A quantity that can be measured, consists of a numerical magnitude and a unit
2
Q
Oscillation
A
Each complete to-and-fro motion is one oscillation
3
Q
Period
A
Time taken for one complete oscillation
4
Q
Base quantities and SI unit
A
- Length (m)
- Mass (Kg)
- Time (s)
- Electric current (A)
- Temperature (K)
5
Q
Prefixes
A
giga (G) 9
mega (M) 6
kilo (k) 3
deci (d) -1
centi (c) -2
mili (m) -3
micro (u) -6
nano (n) -9
6
Q
What does the period of a pendulum depend on
A
Length and gravitational field
7
Q
Precision of 4 instruments
A
Tape measure and metre rule: 1mm
Vernier calipers: 0.1mm (1cm to 15cm)
Micrometer screw gauge: 0.001mm (less than 2.5cm)
