Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Physics > P3 > Flashcards

P3 Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

3 areas of energy demand

A

electricity
transportation
heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

renewable

non-renewable energy sources

A

solar + wind + hydro energy

non-renewable = oil, natural gas, coal, and nuclear energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

how are fossil fuels made ?

whats the type of energy stored in them ?

A

buried combustible geologic deposits of organic materials, formed from decayed plants and animals

the type of energy stored = chemical energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

uses of fossil fuels

A

to produce energy

Coal, crude oil, and natural gas are all considered fossil fuels

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

advantages

disadvantages of fossil fuels

A

advantages = cheap , reliable as there is alot of it

disadvantages = non-renewable , dangerous ,
water pollution + oil spills

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

coal power station

A

Coal-fired plants produce electricity by burning coal in a boiler to produce steam

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

how are fossil fuels contributing to global warming

A

When fossil fuels are burned, they release large amounts of carbon dioxide, a greenhouse gas, into the air. Greenhouse gases trap heat in our atmosphere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what is carbon capture and storage

A

trapping carbon dioxide and storing it in such a way that it is unable to affect the atmosphere.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

acid rain ?

A

rainfall made so acidic by atmospheric pollution that it causes environmental harm,

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

2 examples of nuclear fuels :

A

uranium and plutonium.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

explain how nuclear fuels release heat energy

A

nuclear fuel undergoes a controlled chain reaction in the reactor to produce heat - nuclear energy is converted to heat energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

how do nuclear power stations work

A

Nuclear power plants heat water to produce steam. The steam is used to spin large turbines that generate electricity.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

a similarity between fossil fuel and nuclear power stations

A

they both produce steam to drive a turbine-generator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

advantages and disadvantages of nuclear power

A

A = Produces no polluting gases , low fuel costs , Low fuel quantity reduces mining and transportation effects on environment.

D = Waste is radioactive and safe disposal is very difficult and expensive, Local thermal pollution from wastewater affects marine life , Large-scale accidents can be catastrophic.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

safe nuclear disposal waste

A

storage of used fuel to be placed under water for atleast 5yrs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

biofuels ?

3 examples :

A

fuels produced directly or indirectly from organic material

ethanol , biodiesel and bio gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

uses of biofuels

A

transportation
heat
electronics
cooking

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

advantages

disadvantages of biofuels

A

A = Less carbon emissions , Renewable source , reduces the use of fossil fuels

D = uses a lot of land - needs alot of labour , cant be used in cars with modifying the cars

19
Q

how is wind power used to produce electricity

A

wind turbines

20
Q

advantages

disadvantages of wind power

A

A = Renewable & clean source of energy Intermittent
Low operating costs Noise and visual pollution
Efficient use of land space

D = Intermittent
Noise and visual pollution
Some adverse environmental impact

21
Q

how is electricity generated from hydroelectric power stations

A

hydroelectric power is generated using flowing water to spin a turbine which turns a shaft that’s connected to an electric generator.

22
Q

advantages and

disadvantages of hydroelectric power

A

A = renewable , low emission , reliable

D = expensive , bad for environment , limited reserves

23
Q

what is a pump storage power station ?

A

type of hydroelectric energy storage used by electric power systems for load balancing. The method stores energy in the form of gravitational potential energy of water, pumped from a lower elevation reservoir to a higher elevation.

24
Q

how is electricity generated from wave power

A

As the wind passes over the surface of the oceans, a portion of the winds kinetic energy is transferred to the water below, generating waves. … The kinetic energy of the wave turns a turbine attached to a generator, which produces electricity.

25
Q

advantages

disadvantages of wave energy

A

A = environmentally friendly, reliable, reduces the use of others

D = ugly, only useful to those near the water, distrubs the ecosystems

26
Q

how is electricity generated from tidal power

A

created using the movement of our tides and oceans, where the intensity of the water from the rise and fall of tides is a form of kinetic energy. Tidal power surrounds gravitational hydropower, which uses the movement of water to push a turbine to generate electricity.

27
Q

advantages

disadvantages of tidal power

A

A = renewable so environmentally friendly , reliable, they last a long time , generate alot

D = expensive , are bad for the close environment around , not constant

28
Q

2 methods of power from the sun

A

heat and light

29
Q

how do solar cells produce electricity

A

made up of two layers of silicon that are treated to let electricity flow through them when exposed to sunlight.

30
Q

advantages

disadvantages for solar cells

A

A = renewable energy, reduces electricity bills, low maintenance cost

D = expensive to start , weather dependant, space consuming

31
Q

solar water panels produce electricity ?

A

solar water heaters work the same as solar panels but produce heat

32
Q

advantages and

disadvantages of solar water panels

A

A = savings on heating bills, low maintenance, environmentally friendly

D = expensive to install, dependant on climate, only heats water

33
Q

wheres geothermal power from

A

the heat that comes from the sub-surface of the earth.

34
Q

how does geothermal power work

A

use steam to produce electricity. The steam comes from reservoirs of hot water found a few miles or more below the earth’s surface. The steam rotates a turbine that activates a generator, which produces electricity.

35
Q

advantages and

disadvantages of geothermal power

A

A = environmentally friendly, renewable, stable, no fuel required

D = location specific, expensive, gases are released during digging

36
Q

how has the use of energy changed over the past 50 yrs

A

rapid decline in the use of coal and fuels

37
Q

2 main functions of the national grid

A

transmission and distribution of electricity and gas.

38
Q

diagram of national gird system

A

power station - step up transformer - pylons - step down transformers - to mains supplies(houses factories ect)

39
Q

explain how the national grid reduces energy losses when transporting electricity ?

A

, a step-up transformer is used to increase the voltage and reduce the current. … Less current means less energy is lost through heating the wire.

40
Q

uses of
pylons
and cables

A

Pylons are used to support electrical cables that transmit high-voltage electricity from where it’s generated

41
Q

current and voltage at the pylons

A

high voltage

low current at the pylons

42
Q

advantages and

disadvantages for overhead and underground cables

A

A = look better, reduced electric and magnetic fields,lesser transmission lost,

D = expensive, difficult to find and repair, underground damage easily

43
Q

whats the base load energy demand

A

The baseload on a grid is the minimum level of demand on an electrical grid over a span of time, for example, one week

44
Q

what is start up time

A

The amount of time it takes for the power station to go from being off and not producing anything, to able to produce electricity.

Physics (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions