physics
GCSE
GCSE
Set of flashcards Details
| Flashcards | 32 |
|---|---|
| Language | English |
| Category | Nature Studies |
| Level | Secondary School |
| Created / Updated | 01.06.2016 / 01.06.2016 |
| Weblink |
https://card2brain.ch/box/physics_
|
| Embed |
<iframe src="https://card2brain.ch/box/physics_/embed" width="780" height="150" scrolling="no" frameborder="0"></iframe>
|
Create or copy sets of flashcards
With an upgrade you can create or copy an unlimited number of sets and use many more additional features.
Log in to see all the cards.
Power
Power = rate of doing Work (P=W/t)
Kinetic Energy
• Kinetic Energy = ½ mass x speed squared (KE= ½ mv2)
Gravitational Potential Energy
• Gravitational Potential Energy = mass x gravity x height gained (GPE = mgh)
- Conservation of energy in falling objects
o GPE at start = KE at end
Types of graph for metal wire
• Types of graph for metal wire, spring and rubber (hysteresis)
- Hooke's Law (force directly proportional to extension)
o Force = spring constant x extension (F=kx)
Combinations of springs
• Combinations of springs - series and parallel
Ray diagrams drawn correctly
o Arrow on rays , Normal - (90o to surface) , Identification of angles of incidence, reflection and refraction
- Reflection from plane (flat) mirrors
o Position of image (equal distance behind mirror as in front) and laterally inverted o Law of Reflection ♣ Angle of Incidence = Angle of Reflection o Reflection from concave and convex mirrors and their uses
- Refraction
o Light ray diagrams of rays passing from air to water or glass and from water or glass to air
- Refractive Index
o Refractive Index = Sine Angle of Incidence OR n = Sin i Sine Angle of Refraction Sin r
Total Internal Reflection and Critical Angle
o Sine Critical Angle = 1/Refractive Index (Sin c = 1/n) o Only when ray travels from more dense to less dense mediums o Uses - endoscopes, optical fibres (diagram) o Turning prisms
- Absolute Zero and Kelvin Scale of temperature
o 0K = -273oC ♣ Conversion from one scale to the other o Kelvin scale is proportional to the mean (average) kinetic energy of gas particles o Energy of particles at absolute zero is zero
- Pressure in a gas
o Collisions of particles with walls of containers o Each collision exerts a force o Average of total force on each wall of container the same ♣ All surfaces see same pressure as P=F/A
- Boyles Law for gases
o p1V1 = p2V2 ♣ Constant mass of gas ♣ Constant temperature ♣ Examples - breathing and aerosols
Charge
• Charge = Current x time (Q=It)
Voltage
• Voltage = Current x Resistance (V=IR - also known as Ohms Law)
Circuit types
parallel and series
Circuit Current, Voltage and Resistance rules
o Series - Current same, voltage shared, add resistance to get total resistance o Parallel - Voltage same current shared in branches of circuit
Light bulb
• Light bulb - effects of heat on resistance (non-ohmic graph of V against I is not straight line)
Special resistors
- LDR, thermistor and diode ,Graph shapes and uses
- Alternating and Direct Current
o Graphs of wave forms and sources
- Domestic Electricity Supply
o Plugs and wiring (Blue Neutral, Brown Live, Green and Yellow Earth) ♣ Common Faults o Protection by Earth wire, fuses and double insulation
Electrical Power
• Electrical Power = Current x Voltage (P=IV but also using V=IR, P=I2R and P= V2/R)
Electrical Energy
• Electrical Energy = Current x Voltage x Time (E=IVt)
Weight
• Weight = mass x gravity (W=mg)
- Resultant Forces
o All forces in same plane (ie: horizontal) can be added together to give an equivalent single force
Newton's 2nd Law
• Newton's 2nd Law Force = mass x acceleration (F=ma)
- Friction and Drag and their effects
slow things down
- Terminal Velocity - sky diver
o Forces balanced , Acceleration zero , Constant speed
-
- 1 / 32
-
