Heat transfer, waves, astronomy

Question 1

What is the speed of light?

Answer 1

300,000 km/s (3 x 10^8 m/s)

Question 2

Abiogenesis is the theory that…

Answer 2

life on earth formed from inanimate substances

Question 3

Panspermia is the theory that…

Answer 3

life developed from simple cells that arrived from space - life may have arrived from somewhere else where it had already evolved travelling on asteroids

Question 4

What is a series circuit?

Answer 4

A circuit with only one path for current flow

Question 5

What is a parallel circuit?

Answer 5

A circuit with multiple paths, or branches, for current flow

Question 6

Define convection

Answer 6

Convection is the transfer of heat from one part of fluid to another by the upward flow of warmer particles

Question 7

Define conduction

Answer 7

Conduction is the method of heat transfer between two areas by direct contact - heat flows from hotter temperature to cooler temperature

Question 8

Where does conduction mostly occur?

Answer 8

In solids

Question 9

Define radiation

Answer 9

Thermal energy travelling in electromagnetic waves - infrared radiation

Question 10

What are the three heat transfer methods?

Answer 10

Conduction
Convection
Radiation

Question 11

What is the doppler effect?

Answer 11

An effect where sound changes pitch

Question 12

(Doppler effect) What happens to the sound when the source is coming towards you?

Answer 12

The sound waves are compressed producing a higher pitch

Question 13

(Doppler effect) What happens to the sound if the source is moving away from you?

Answer 13

As it moves away, the sound waves become stretched making a lower pitch

Question 14

What colour is high visible light frequency?

Answer 14

Red

Question 15

What colour is low visible light frequency?

Answer 15

Blue

Question 16

What is red shift?

Answer 16

If something is red shifting, it is moving away from us

Question 17

What is blue shift?

Answer 17

If something is blue shifting, it is coming towards us at speed

Question 19

What is current measured in?

Answer 19

Amperes (AKA ‘amps’ or ‘A’)

Question 20

What is current flowing through a component in a circuit measured with?

Answer 20

an ammeter

Question 21

What is needed to make a current flow through an electrical component?

Answer 21

potential difference or VOLTAGE

Question 22

What is voltage measured in?

Answer 22

Volts (‘V’)

Question 23

What is voltage in a component measured with?

Answer 23

A voltmeter (must be connected in parallel with the component)

Question 24

What does electricity travel well through?

Answer 24

Conductors

Question 25

What does not conduct electricity?

Answer 25

Insulators

Question 26

What is the wave speed equation?

Answer 26

Wave speed = wavelength x frequency (v = 2f)

Question 27

What is Keplers first law?

Answer 27

That we go into an ellipse

Question 28

What is Keplers second law?

Answer 28

That we go faster when we are closer to the sun and slower when we are further apart from the sun

Question 29

What is Keplers third law?

Answer 29

orbital period(T1)/distance to body being orbited (R1) = T2/R2