PHYSICS

  • Created by: Shay8200
  • Created on: 06-08-18 20:37
T1.What are the different energy stores?
Thermal, Kinetic, Gravitational Potential, Elastic Potential, Chemical, Magnetic, Electrostatic, Nuclear
1 of 42
T1.How is energy transferred?
Mechanically(by a force doing work), electrically(work done by moving charges), by heating or by radiation.
2 of 42
T1.How do you calculate Kinetic energy(J)?
0.5 x mass(kg) x speed²(m/s)²
3 of 42
T1.How do you calculate Gravitational Potential energy(J)?
Mass(kg) x Gravitational Field Strength(N/kg) x Height(m)
4 of 42
T1.How do you calculate Elastic Potential Energy(J)?
0.5 x Spring Constant(N/m) x Extension²(m)²
5 of 42
T1.What does Specific Heat Capacity mean?
AMOUNT of ENERGY NEEDED to RAISE THE TEMPERATURE OF 1KG OF A SUBSTANCE BY 1°C
6 of 42
T1.How do you calculate CHANGE IN THERMAL ENERGY(J)?
Mass(kg) x Specific Heat Capacity(J/kg°C) x Temperature Change(°C)
7 of 42
T1.How does Energy move?
Energy can be TRANSFERRED USEFULLY, STORED OR DISSIPATED(wasted). BUT NEVER CREATED OR DESTROYED.
8 of 42
T1.What does Power mean?
RATE of ENERGY TRANSFER or RATE of DOING WORK
9 of 42
T1.What are the 2 equations that calculate POWER(W)?
Energy Transferred(J) ÷Time(s) & Work Done(J)÷Time(s)
10 of 42
T1.What is CONDUCTION(mainly in solids)?
Process-VIBRATING PARTICLES TRANSFER ENERGY to NEIGHBOURING PARTICLES
11 of 42
T1.What is CONVECTION(mainly in liquids and gases)?
Where ENERGETIC PARTICLES MOVE AWAY from HOTTER to COOLER REGIONS
12 of 42
T1.How is the process of CONVECTION CURRENT happen regarding radiator?
The less denser, warmer air rises and is replaced by the cooler, denser air (and is then heated by the radiator)
13 of 42
T1.What are the ways of reducing UNWANTED ENERGY TRANSFERS?
LUBRICANTS(-liquids that flow easily between and coat-reduce FRICTIONAL FORCES) & INSULATION(-PREVENTS energy loss through heating
14 of 42
T1.What does EFFICIENCY mean?
The LESS ENERGY that is 'WASTED' in energy store, MORE EFFICIENT
15 of 42
T1.What are the 2 equations relating the calculation of Efficiency?
USEFUL OUTPUT ENERGY TRANSFER÷TOTAL INPUT ENERGY TRANSFER & USEFUL POWER INPUT÷TOTAL POWER INPUT
16 of 42
T1.What are the 2 groups of Energy Resources?
Renewable & Non- renewable
17 of 42
T1.What does the term 'non-renewable' suggest?
These resources will RUN OUT one day
18 of 42
T1.What are the 3 examples of non-renewable fossil fuels?
Coal, Crude Oil, Natural Gas
19 of 42
T1.What are Energy Resources USED FOR?
Mainly TRANSPORT & HEATING
20 of 42
T1.What are the 3 aspects of non-renewable resources?
They will run out, they all do DAMAGE to the ENVIRONMENT, provide MOST of our ENERGY
21 of 42
T1.What does the term 'renewable' refer to?
will NEVER RUN OUT
22 of 42
T1.Provide examples of Renewable Energy Resources?
Solar(Sun), Wind, Water waves, Hydro-electricity, Bio-fuel, Tides, Geothermal
23 of 42
T1.What are the aspects regarding renewable resources?
never run out & can be renewed, mostly do damage but less nasty ways, but do not provide much electricity & mostly UNRELIABLE; rely on weather
24 of 42
T1.What are the pros and cons of renewable resources?
+ No pollution, no permanent damage to landscape, no fuel costs. - Very noisy, unappealing view, unreliable
25 of 42
T1.What are the pros and cons of non-renewable resources?
+ Reliable, provide more energy - Waste products released, encourages the green house effect, fuels slowly running out
26 of 42
T2. What is the definition of Current(ampere,A)?
Flow of electrical charge
27 of 42
T2. What is the definition of Potential Difference/voltage(volt,V)
The driving force that pushes the charge around.
28 of 42
T2. What is the definition of resistance(Ohms, Ω)?
Anything that slows the flow down
29 of 42
T2. What happens when the resistance across a component is greater?
the current flows smaller
30 of 42
T2. How do you calculate the Charge flow(Coulombs,C)?
Current(A) × Time(s)
31 of 42
T2. What is the equation calculating Potential Difference(V)?
Current(A) × Resistance(Ω)
32 of 42
T2. What does the Ammeter measure?
Current (in amps) and must always be placed in SERIES with whatever you are investigating.
33 of 42
T2. What does the Voltmeter measure?
Potential Difference (in volts) and must always be placed in PARALLEL around whatever you're investigating.
34 of 42
T2. What is an Ohmic Conductor?
A conductor that obeys OHM'S LAW: V= I × R
35 of 42
T2. What do Ohmic Conductors have?
Constant Resistance
36 of 42
T2. How does Current behave through an Ohmic Conductor?
DIRECTLY PROPORTIONAL to Potential Difference - straight line on graph
37 of 42
T2. How does Current behave through a Filament Lamp?
As Current increases, the TEMPERATURE of filament INCREASES, so RESISTANCE INCREASES - LESS CURRENT can FLOW - curve graph
38 of 42
T2. How does Current behave through a Diode?
Only FLOW in ONE DIRECTION. Has VERY HIGH RESISTANCE in REVERSE DIRECTION
39 of 42
T2. What does LDR stand for?
Light Dependent Resistor
40 of 42
T2. What is an LDR?
Resistor that is dependant on the INTENSITY of LIGHT. In BRIGHT LIGHT - resistance FALLS, in darkness - resistance HIGHEST
41 of 42
In SERIES CIRCUITS, how is the total PD supplied to each component?
SHARED
42 of 42

Other cards in this set

Card 2

Front

T1.How is energy transferred?

Back

Mechanically(by a force doing work), electrically(work done by moving charges), by heating or by radiation.

Card 3

Front

T1.How do you calculate Kinetic energy(J)?

Back

Preview of the front of card 3

Card 4

Front

T1.How do you calculate Gravitational Potential energy(J)?

Back

Preview of the front of card 4

Card 5

Front

T1.How do you calculate Elastic Potential Energy(J)?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Physics resources:

See all Physics resources »See all Energy resources »