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PHYSICS AND SYSTEM UNITS AMOUNT Model Nature Observation Events Eksperimen Measurement Physical quantities What is measured?

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Presentasi berjudul: "PHYSICS AND SYSTEM UNITS AMOUNT Model Nature Observation Events Eksperimen Measurement Physical quantities What is measured?"— Transcript presentasi:

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2 PHYSICS AND SYSTEM UNITS AMOUNT

3 Model Nature Observation Events Eksperimen Measurement Physical quantities What is measured?

4 meansurement Quality (Measurement Result tolls presentation prece unit Standard size System unit calibration System Matrik SI

5 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

6 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)

7 SISTEM MATRIK DALAM SI Faktor Awalan Simbol exa-E peta-P tera-T 10 9 giga-G 10 6 mega-M 10 3 kilo-k 10 2 hekto-h 10 1 deka-da Faktor AwalanSimbol desi-d senti-c mili-m mikro-  nano-n piko-p femto- f ato- a

8 Definisi standar besaran pokok  Length - meter: One meter is the path length in a vacuum through which the light within an interval of 1 / 299, seconds. Mass - kilogram: One kilogram is the mass of platinum-iridium cylinder with a height of 39 mm and 39 mm diameter.  Time - second One second is 9,192,631,770 times the period (vibration) radiation emitted by cesium-133 atom in a transition between two energy levels (hyperfine levels) contained in the basic level (ground state).

9 Derived Quantities  Example: Speed performed per unit time shift unit: meters per second (ms-1) Acceleration change of velocity per unit time unit: meters per second squared (ms-2) Style mass times acceleration unit: newtons (N) = kg m s-2

10 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 Simbol Dimensi Massa M Panjang L Waktu T Arus listrik I Besaran Pokok Simbol Dimensi Suhu  Jumlah ZatN Intensitas J

11 Dimensional Analysis n A scale can be added or subtracted if it has the same dimensions. n Every tribe in the equations of physics must have the same dimensions

12 example : Simple swing period T expressed by the formula following: 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! question : dimension period [T] : T Dimension lenghy [l] : L Dimensions of the acceleration of gravity [g] : LT -2  : dimensionless

13 Model Peristiwa Alam Eksperimen Pengamatan Pengukuran Besaran Fisika Kuantitas Karakteristik Interaksi antar materi yang teramati Teori Konsep Fisika Hukum Fisika Apakah yang diamati ? Apakah yang diukur ?


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