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Unformatted text preview: Review for Final.
(a) Significant figures : ex) 0.023 has 2 significant figures. 0.2340 has 4 significant figures. 0.023 534.0 has 2 significant figures (b) Scientific Notation ex) 2,000,000 = 2.0 106 0.000028400 = 2.8400 10-5 2. Unit. I
(a) Average : sum of measurement values / number of measurement (b) Deviation (for each measurement) : | measurement value - average | (c) Uncertainty : (maximum deviation - minimum deviation )/ 3 (d) Result : ex) 5.2 0.3 (e) Relative Uncertainty : U ncertainty/Average 100 ex) 0.3/5.2 100 = 6% (f) Linear relationship : ex) Circumference(C) = Diameter (D), slope in C vs. D graph : (g) Hook's Law : F = kx, slope in F vs. x graph : k (h) SI unit of length(distance) : [m] 3. Unit. II
(a) period (T ): The time it takes the pendulum to complete one full swing. (b) frequency (f ) : The number of swing completed by the pendulum in one second. 1 T = f ex) 10 swings for 100 seconds, T = 100s/10 = 10s, f = 1/T = 1/10s = 0.1s-1 = 0.1Hz. 1 (c) Pendulum : period T depends on only length of string, not mass or angle. ( is a proportional constant) T l T 2 = l (d) Area : ex) Area of circle(radius r) = r2 . Surface area of a sphere (radius r) = 4r2 . (e) SI units time : [s], period : [s], frequency : [s-1 ] or [Hz], area : [m2 ] 4. Unit. III
(a) Volume : ex) Volume of a sphere (radius r) = 3 r3 . 4 (b) Density : mass / volume (c) Scailing : ex) Double the length of linear dimension volume is 8 times larger. (d) Si units i. Volume : [m3 ] ii. Mass : [kg] iii. Density : [kg/m3 ] 5. Unit. VII
(a) Torque : = r F = |r||F |sin (b) Equilibrium : F = 0 = 0 ex) Seesaw 2 ...
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- Spring '08
- International System of Units, Kilogram