SI Table
Base physical quantity

Symbol for quantity

SI units name

SI units symbol

Length

l

Metre

m

Mass

m

Kilogram

Kg

Time

t

Second

s

Current

I

Ampere

A

Temperature

T

Kelvin

K

Amount of substance

n

Mole

Mol

Luminous intensity

I_{v}

candela

Cd

Prefixes for SI Units
Multiple

Prefix

Symbol

10^{24}

Yocto

y

10^{21}

Zepto

z

10^{18}

Atto

a

10^{15}

Femto

f

10^{12}

Pico

p

10^{9}

Nano

n

10^{6}

Micro

m

10^{3}

Milli

m

10^{2}

Centi

c

10^{1}

Deci

d

10

Deca

da

10^{2}

Hecto

h

10^{3}

Kilo

k

10^{6}

Mega

M

10^{9}

Giga

G

10^{12}

Tera

T

10^{15}

Peta

P

10^{18}

Exa

E

10^{21}

Zeta

Z

10^{24}

yotto

Y

Mass: amount of matter in object
=>
1 kg = 1000 gram
Weight: force on the object by gravity.
Volume: (length)^{3}
=>
1 L = 1000 ml, 1000 cm^{3} = 1dm^{3}
Density: Amount of mass per unit volume.
=>
SI unit : Kgm^{3}
Temperature: It is the measurement of cooling or warming.
Three scales
=>
^{0}C (Degree Celsius)
=>
^{0}F degree Fahrenheit)
=>
k (Kelvin)
=>
freezing point of water = 0^{ 0}C
=>
Boiling point of water = 100 ^{0}C
Relationship
Or,
k = ^{0}C +
273.15
Precision: Closeness
of various measurement for same quantity.
Accuracy: It is the
agreement of a particular value to the true value of the result.
Significant figure:
The meaningful digits which are known with certainty.
SI Units  Basic Chemistry in Hindi Part 1
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