4299350
Description
Flashcards by Jono Barnes, updated more than 1 year ago
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Created by Jono Barnes
about 10 years ago
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| Question | Answer |
| Snells Law Equation | Ni Sin(i) = Nr Sin(r) i - angle of incidence r - angle of refraction Ni - refractive index of incident medium Nr - refractive index of medium where refraction occurs |
| Refractive Index Equation | Speed of light in vacuum (3x10^8m/s) ----------------------------------------------------- speed of light in medium |
| Critical Angle Equation | Sin(C) = Nr ------ Ni |
| When does total internal reflection occur | Occurs when a wave hits the boundary between two substances at an angle beyond the critical angle |
| Moment Equation | Moment = force x distance |
| Circular Motion Equation | F = m v^2 ------ r |
| Pressure Equation | Pressure = force -------- area |
| Pressure in Liquids Equation | P = hpg h - height in liquid p - density of liquid g - gravitational field strength |
| Work Done | force x distance in direction of travel |
| Power | energy transferred (J) ------------------------------ time taken (s) |
| Power | Work done (J) --------------------------- time taken (s) |
| Efficiency | useful energy out ------------------------------- total energy in |
| Boyles Law | Pressure of a gas is inversely proportional to its volume: p1 v1 = v2 p2 |
| Pressure Law (TEMP MUST BE KELVIN) | p1 = p2 ----- ----- t1 t2 |
| Energy Absorbed Equation | E = mass x specific heat capacity x temp rise /\E = mc/\T |
| Specific Latent Heat Equation | Energy = mass x specific latent heat E = mL |
| What is specific latent heat of a substance? | This tells us how much energy is needed to change the state of 1kg of a substance at constant temperature |
| Gain in KE = ??? | Loss of GPE v = √2gh |
| Energy Supplied Equation | Energy Supplied = Power(W) x time(s) |
| Density Equation | mass ----------- volume |
| Momentum Equation | momentum = mass x velocity p = mv (kgm/s) |
| Impulse, what is it? | Change in momentum: resultant force x time F t = /\p |
| What happens to momentum after a collision? | It is the same: total momentum before = total momentum after |
| KE from momentum equation | KE = p^2 -------- 2m |
| Wave Frequency Equation | number of waves --------------------------- time f = n/t |
| Time for one oscillation | T = 1 / f |
| Wavelength Equation | λ(m) = v(m/s)/f |
| Density Equation | Mass / Volume |
| GPE Equation | GPE = mgh |
| KE Equation | 1/2 m v^2 |
| Speed Equation | S = d / t |
| Velocity equation | v = displacement / time |
| Acceleration Equation | /\v / t |
| Acceleration Equation 2 | f = ma a = f/m |
| Newton's 1st Law | If there is no resultant force acting on an object it will move with constant velocity (can be zero) |
| Newton's Second Law | If a resultant force acts on a body, the body will accelerate in the direction of the force f = ma |
| Newton's Third Law | Every action has an equal and opposite reaction |
| Weight Equation | weight = mass x gravitational acceleration(9.81m/s) |
| Hooke's Law | F = kx k - spring constant x - extension A material is said to obey Hooke's Law if its extension is directly proportional to the applied force |
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