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Physics
Physics is a branch of science that involves the study of physical world : energy, matter and how they are related. For example, study of motion of electron, rocket, energy released during the explosion of atomic bomb, energy in waves, electronic circuits, structure of protons and of universe etc.
Mathematics and Physics
Physics uses mathematics as a powerful tool. Many physics laws are expressed in terms of mathematical forms and formulas.
Units
1. SI Unit being used in Physics
(International System of Units-SI units)
Quantity Base Unit Symbol
Mass : Kilogram kg
Temperature kelvin k
Length : meter m
Amount of substance mole mol
Time: second s or sec
Electric current ampere A
Luminous intensity candela cd
Three Fundamental Units being used in mechanics
Mass
Length
Time
kg
m (meter)
s (second)
2. SI prefixes
Prefix
1000m
10n
English word
Adoption[nb 1]
Name
Symbol
Y
10008
1000000000000000000000000
septillion
quadrillion
1991
zetta
Z
10007
1000000000000000000000
sextillion
thousand trillion or trilliard
1991
E
10006
1000000000000000000
quintillion
trillion
1975
P
10005
1000000000000000
quadrillion
thousand billion or billiard
1975
T
10004
1000000000000
trillion
billion
1960
G
10003
1000000000
billion
thousand million or milliard
1960
M
10002
1000000
million
1960 (1873)
k
10001
1000
thousand
1960 (1795)
h
10002/3
100
hundred
1960 (1795)
da
10001/3
10
ten
1960 (1795)
10000
1
one
–
d
1000−1/3
0.1
tenth
1960 (1795)
c
1000−2/3
0.01
hundredth
1960 (1795)
m
1000−1
0.001
thousandth
1960 (1795)
μ
1000−2
0.000001
millionth
1960 (1873)
n
1000−3
0.000000001
billionth
thousand millionth
1960
p
1000−4
0.000000000001
trillionth
billionth
1960
f
1000−5
0.000000000000001
quadrillionth
thousand billionth
1964
a
1000−6
0.000000000000000001
quintillionth
trillionth
1964
z
1000−7
0.000000000000000000001
sextillionth
thousand trillionth
1991
y
1000−8
0.000000000000000000000001
septillionth
quadrillionth
1991
3. Standard Abbreviations for Unit Names:
s = second N = newton V = volt cm = centimeter lb = pound m = meter J = joule
W = watt ft = foot Hz = hertz A = Ampere g = gram mi = mile C = coulomb
kg = kilogram
4.Examples
Unit conversion
5 nm= 5 nanometer = 5x 10 - 9 meter
3 giga seconds = 3x 109 s
Complete the following chart:
mm cm m km
1.0 = = = _____
= 25 = =
= = 3.71 =
5. Homework
https://drive.google.com/file/d/1DVLlX2-JeCVY-wQmiJ2AWur3dyKYOhhs/view