physics and system units amount
DESCRIPTION
PHYSICS AND SYSTEM UNITS AMOUNT. What is measured?. Measurement. Physical quantities. Nature Observation Events. Model. Eksperimen. meansurement. tolls. Quality (Measurement Result. calibration. System Matrik. SI. presentation. prece. unit. Standard size. System unit. - PowerPoint PPT PresentationTRANSCRIPT
PHYSICS AND SYSTEM UNITS AMOUNT
Model
Nature Observation Events
Eksperimen
Measurement Physical quantities What is measured?
meansurement
Quality
(Measurement Result
tolls
presentationprece unit
Standard size System unit
calibrationSystem Matrik SI
Magnitude
Physics
Conceptual
Matematis
Principal Amount
Derived Quantities
Scalar Quantities
Vector Magnitude
: specified quantities
with a standard size
: Quantities of formulated
magnitudes of principal
: only has value
: have the value and direction
Besaran Pokok(dalam SI)
Massa
Panjang
Waktu
Arus listrik
Suhu
Jumlah Zat
Intensitas
Satuan(dalam SI)
kilogram (kg)
meter (m)
sekon (s)
ampere (A)
kelvin (K)
mole (mol)
kandela (cd)
SISTEM MATRIK DALAM SI
Faktor Awalan Simbol
1018 exa- E
1015 peta- P
1012 tera- T
109 giga- G
106 mega- M
103 kilo- k
102 hekto- h
101 deka- da
Faktor Awalan Simbol
10-1 desi- d
10-2 senti- c
10-3 mili- m
10-6 mikro-
10-9 nano- n
10-12 piko- p
10-15 femto- f
10-18 ato- a
Definisi standar besaran pokok
Length - meter:Length - meter:One meter is the path length in a vacuum through which the light One meter is the path length in a vacuum through which the light within an interval of 1 / 299, 792.458 seconds.within an interval of 1 / 299, 792.458 seconds.Mass - kilogram:Mass - kilogram:One kilogram is the mass of platinum-iridium cylinder with a One kilogram is the mass of platinum-iridium cylinder with a height of 39 mm and 39 mm diameter.height of 39 mm and 39 mm diameter.
Time - secondTime - secondOne second is 9,192,631,770 times the period (vibration) radiation One second is 9,192,631,770 times the period (vibration) radiation emitted by cesium-133 atom in a transition between two energy emitted by cesium-133 atom in a transition between two energy levels (hyperfine levels) contained in the basic level (ground state).levels (hyperfine levels) contained in the basic level (ground state).
Derived Quantities Example:
Speedperformed per unit time shiftunit: meters per second (ms-1) Accelerationchange of velocity per unit timeunit: meters per second squared (ms-2) Stylemass times accelerationunit: newtons (N) = kg m s-2
Dimension Dimensions expressed the essence of a physical quantity does not
depend on the units used.The distance between two places can be expressed in meters, miles, steps, etc.. Whatever the distance unit is basically a "long".
Besaran Pokok
SimbolDimensi
Massa M
Panjang L
Waktu T
Arus listrik I
Besaran Pokok
SimbolDimensi
Suhu
Jumlah Zat N
Intensitas J
Dimensional Analysis
A scale can be added or subtracted if it has the A scale can be added or subtracted if it has the same dimensions.same dimensions.
Every tribe in the equations of physics must have Every tribe in the equations of physics must have the same dimensionsthe same dimensions
example :Simple swing period T expressed by the formulafollowing:
where l is the length of string and g acceleration of gravity with the square length unit per time. Show that the equation is dimensionally correct!
T lg2
question :
dimension period [T] : T
Dimension lenghy [l] : LDimensions of the acceleration of gravity [g] :LT-2
: dimensionless
2LTL
T
T
Model
Peristiwa Alam
Eksperimen
Pengamatan
Pengukuran
Besaran Fisika
Kuantitas
Karakteristik Interaksiantar materi yang teramati
Teori
Konsep FisikaHukumFisika
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