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physical quantities and measurement - Coggle Diagram
physical quantities and measurement
si units
kg
m
s
A
K
prefix
giga
G
1 000 000 000
mega
M
1 000 000
kilo
K
1 000
deci
d
0.1
centi
c
0.01
milli
m
0.001
micro
µ
0.000 001
nano
n
0.000 000 001
MEASUREMENTS
length
metre rule, measure tapes, vernier calipers
area
square
l x l
rectangle
l x w
circle
π x r2
volume
cube
l x l x l
cuboid
l x h x w
cylinder
π x r2 x h
sphere
4/3 x π x r3
irregular objects
displacement
mass
beam balance, electronic balance
temperature
liquid-in-glass thermometer using alcohol or mercury
time
mechanical stopwatch, digital stopwatch, hourglass, atomic clocks
errors in measurement
zero error
when an instrument gives a non-zero reading before any measurements
parallax error
because of error in reading when the eyes isnt perpendicular to the scale
end error
when the ends of an instrument is damaged