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Презентация на тему The systeme international SI Units

TimeLengthMassTemperatureElectric CurrentAmount of SubstanceLuminous IntensitytlmT , ӨIn(not in A Level)secondmetrekilogramkelvinamperemolecandelasmkgKAmolcd
The Système InternationalSI UnitsGEL2006More free powerpoints at www.worldofteaching.com TimeLengthMassTemperatureElectric CurrentAmount of SubstanceLuminous IntensitytlmT , ӨIn(not in A Level)secondmetrekilogramkelvinamperemolecandelasmkgKAmolcd densitymomentumforcepressurework (energy)powerelectrical chargepotential differenceresistance Homogenous EquationsEp = m g h  = Nm = kg kgms-2kg-1 Homogenous Equationsv2 = u2 +2ax     = Homogenous EquationsF = m v      r Homogenous EquationsWhat is missing?   kgms-2 = kgs-1 ∴ The equation Homogenous EquationsTry these:Ek = ½ m v2and v = u + at2 Show that these equations are homogenous	a) x = ut + ½at2	b) T
Слайды презентации

Слайд 2 Time

Length
Mass
Temperature
Electric Current
Amount of Substance
Luminous Intensity

t
l
m
T , Ө
I
n
(not in

TimeLengthMassTemperatureElectric CurrentAmount of SubstanceLuminous IntensitytlmT , ӨIn(not in A Level)secondmetrekilogramkelvinamperemolecandelasmkgKAmolcd

A Level)
second
metre
kilogram
kelvin
ampere
mole
candela
s
m
kg
K
A
mol
cd


Слайд 3 density
momentum
force
pressure
work (energy)
power
electrical charge
potential difference
resistance

densitymomentumforcepressurework (energy)powerelectrical chargepotential differenceresistance

Слайд 4 Homogenous Equations
Ep = m g h

=

Homogenous EquationsEp = m g h = Nm = kg kgms-2kg-1



Nm = kg kgms-2kg-1 m
kgms-2 m = kgm2s-2
kgm2s-2 =

kgm2s-2

∴ This equation is homogenous

J

kg

Nkg-1

m


Слайд 5 Homogenous Equations
v2 = u2 +2ax

Homogenous Equationsv2 = u2 +2ax   =   +

= +



m2s-2 = m2s-2 + m2s-2

∴ This equation is homogenous

m2s-2

m2s-2

ms-2

m


Слайд 6 Homogenous Equations
F = m v

Homogenous EquationsF = m v   r =kgms-2 = kgs-1

r
=

kgms-2 = kgs-1

∴ This

equation is not homogenous

N

kg

ms-1

m-1


Слайд 7 Homogenous Equations
What is missing? kgms-2 =

Homogenous EquationsWhat is missing?  kgms-2 = kgs-1 ∴ The equation

kgs-1


∴ The equation should read:

F = mv2

r

ms-1 =

v on rhs


Слайд 8 Homogenous Equations
Try these:
Ek = ½ m v2




and v

Homogenous EquationsTry these:Ek = ½ m v2and v = u +

= u + at2
J = kg m2s-2
N

m = kg m2s-2
kg m2s-2 = kg m2s-2 OK

ms-1 = ms-1 + ms-2 s2
ms-1 = ms-1 + m Not OK
s-1 is missing, so equation should read:
V = u + at


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