Physics 1b - electricity and waves

Question 1

Name four non-renewable energy resources?

Answer 1

Coal
Oil
Nuclear fuels
Natural gas

Question 2

Name 8 renewable energy resources?

Answer 2

Wind
Solar
Geothermal
Waves
Tide
Hydroelectric
Food
Biofuels

Question 3

Wind power?

Answer 3

Lots of little wind turbines.

Question 4

Solar cells?

Answer 4

Generate electric currents directly from sunlight.

Question 5

Hydroelectric power?

Answer 5

Uses trapped rainwater.

Question 6

Pumped storage?

Answer 6

Gives extra supply only when needed.

Question 7

Waver power?

Answer 7

Lots of little wave powered turbines.

Question 8

Tidal barrages?

Answer 8

Big dams with turbines in them - tide comes in, fills it up, turns the turbine.

Question 9

Geothermal energy?

Answer 9

Heat from underground rises.

Question 10

Biofuels?

Answer 10

Made from plants and waste - gets burned.

Question 11

What is carbon capture and storage?

Answer 11

Used to reduce the amount of CO2, building up in atmosphere, and reduces strength of greenhouse effect.

Question 12

How is electricity distributed?

Answer 12

Through the National Grid.

Question 13

What do waves have?

Answer 13

Amplitude, Frequency and Wavelength.

Question 14

What is the amplitude?

Answer 14

Distance from peak to line of equilibrium

Question 15

What is frequency?

Answer 15

Number of waves passing a point per second.

Question 16

What is wavelength?

Answer 16

Distance between 2 neighbouring peaks.

Question 17

What vibrations do transverse waves have?

Answer 17

Sideways.

Question 18

What vibrations do longitudinal waves have?

Answer 18

Along the same line.

Question 19

What are the vibrations in transverse waves like?

Answer 19

Perpendicular to the direction of energy transfer of the wave.

Question 20

What are the vibrations in longitudinal waves like?

Answer 20

Parallel to the direction of energy transfer of the wave.

Question 21

What is the law of incidence?

Answer 21

Angle of incidence = angle of reflection.

Question 22

Diffraction?

Answer 22

Waves spreading out.

Question 23

Refraction?

Answer 23

Changing the speed of a wave can change its direction.