Download Reviewer for Physics 1 Quarter 1 Week 1 &2 and more Summaries Physics in PDF only on Docsity! Q1-W1&2-General Physics Physical Quantities §-All physical quantities in the International System of Units (SI) are expressed in terms of combinations of seven fundamental physical units, which are units for: length, mass, time, electric current, temperature, amount of a substance, and luminous intensity. SI UNITS: Fundamental and Derived SI Units - major system units used in the world. - French Le Systéme International d’Unités (also known as “metric system”) - English units (“imperial system) - English units were historically used in nations once ruled by the British Empire. - Today, the United States is the only country that still uses English units extensively. - Virtually every other country in the world now uses the metric system, which is the standard system agreed upon by scientists and mathematicians. 7 FUNDAMENTAL PHYSICAL QUANTITIES THAT ARE MEASURED IN PHYSICAL FUNDAMENTAL UNITS: 1. Length 5. Temperature 2. Mass 6. Amount of Substance 3. Time 7. Luminous Intensity 4. Electric current UNITS FOR PHYSICAL QUANTITIES: 1. Force 2. Speed 3. Electric Charge -described by mathematically combining these seven base units. (above texts) The units in which they are measured are the meter, kilogram, second, ampere, kelvin, mole, and candela. Derived Units - are made by mathematically combining the fundamental units. Quantity Name Symbol Length Meter M Mass Kilogram Kg ‘Time Second s Electric current Ampere A ‘Temperature Kelvin K Amount of substance | Mole Mol Luminous intensity | Candela Cd Metric Prefixes - Physical objects or phenomena may vary widely. The size of objects varies from something very small (like an atom) to something very large (like a star). Yet the standard metric unit of length is the meter. So, the metric system includes many prefixes that can be attached toa unit. Each prefix is based on factors of 10 (10, 100, 1,000, etc., as well as 0.1, 0.01, 0.001, etc.). pms all Example [== Example ina cenrary a sos terawatt aw sow | Powerfat cien fo tes ciganers — | cere ros tte | mtormenwe Frequency xo |x 10 Kiomerer | xm orm — | AyeHt 6710 hector | T= Hecrolker | BE TE 26 gallons —. as 10° (=) Prefix | Symbot | value | ==#mPle Example | Example | Example Name Symbol | Value | Description a _ Tika at ite wi | 109 | Millimeter Man 1oom — | Hea tis micro |p 108 | ticrometer jm 106m | Detail in anicxuscope 25 Small speck Nano | 10° | Nanogram Ng 102g | Smalls ‘Small Pico | P 10% | Picofaad pF Ghee | capecitintin radio fc a | 1 = Size ofa Femta | 104 Kemtometer Km rose | Oo "Tite linda. atte fA tose | attosecond As tose, — | tales to stom