Physics
experimental science |
study of the physical world ( interactions between energy and matter) |
Models, Theories, and Laws
Model |
analogy |
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representation of a phenomena in terms of something else we are familiar with |
Theory |
more detailed |
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gives quantitatively testable predictions |
Law |
concise, general statement of nature behavior |
Classical Physics
Acoustics |
sound & sound propagation |
Electromagnetism |
electricity |
Mechanics |
object's state of motion |
Optics |
light and color |
Thermodynamics |
heat |
Modern Physics
Nuclear/Atomic |
nuclear power plants |
Quantum |
matter & energy at fundamental lvl |
Relativity |
focused on Einstein's study |
Condensed Matter |
substances in their solid state |
Plasma |
superheated matter |
Low Temperature |
Filipino Physicists
Christopher & Ma. Victoria Bernido |
teaching physics, innovative way |
Caesar Saloma, PhD |
optics contributions |
Fr. Jose Ramon Villarin, SJ |
atmospheric science contributions |
Reinabelle Reyes, PhD |
astrophysicist, data scientist |
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confirmed Einstein's Theory of Relativity |
Reginald Christian Bernardo, PhD |
first homegrown gravitational scientist |
Jacquiline Romero PhD |
experimental quantum information expert |
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Measurement
End all measurements with first uncertain digit |
Plastic Ruler |
piece of plastic |
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uncertainty: ±0.5 |
Vernier Caliper |
more accurate than ruler |
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used on rings |
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always 3 decimal places |
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can measure depth of hole |
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uncertainty ±0.025 |
Micrometer |
more accurate than ruler and caliper |
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one revolution: ±0.500 |
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uncertainty: ±0.005 |
Significant Figures Rules
all nonzero digits are significant |
5, 121, 859 |
6 SigFigs |
zeros between nonzero digits are significant |
5, 101, 009 |
6 SF |
zeros before first nonzero digit are not sig |
0.0051 |
2 SF |
trailing zeros after decimal point are sig |
5.0000 |
5 SF |
trailing zeros without decimal point are not sig |
500 |
1 SF |
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Vectors and Scalars
Scalar Quantities |
magnitude only, no direction |
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distance, speed, time |
Vector Quantities |
magnitude + direction |
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displacement, velocity, acceleration |
Vector Additions
Graphical Method |
parallelogram |
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head-to-tail |
Mathematical Method |
law of sines and consines |
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supported by graphical method |
Parallelogram Method
initial points coincide, Vr represents resultant vector
Head to Tail Method
uses the Pythagorean theorem
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