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Physics > Physics 1a > Flashcards

Physics 1a Flashcards

1
Q

What are the 3 different ways heat is travelled in

A

conduction
convection
heat radiation

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2
Q

What is a solid travelled in

A

conduction

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3
Q

What is a liquid and gases travelled in

A

convection

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4
Q

What is best radiation travelled in

A

infrared radiation

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5
Q

What is infrared radiation

A

giving out electromagnetic waves

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6
Q

What do all objects do with infrared radiation

A

all objects give out and absorb radiation

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7
Q

the hotter an object …

A

more infrared radiation it gives out

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8
Q

the object hotter than it’s surrounding…

A

gives out more radiation then cools down

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9
Q

the object cooler than it’s surroundings…

A

absorbs more radiation than it emits as it warms up

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10
Q

What does radiation depend on

A

surface colour and texture

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11
Q

what is a good absorber and good emitter or radiation

A

dark matte black surfaces

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12
Q

What are poor absorbers and poor emitters or infrared radition

A

light shiny surfaces

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13
Q

What are light shiny surfaces good for

A

good reflectors

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14
Q

What is radiation from the sun absorbed by

A

black surface to heat up water pipes

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15
Q

What can water in pipes be used for

A

washing or pumped into radiators to heat the building

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16
Q

What are examples of solid liquid and gas

A 
solid = ice 
liquid = water 
gas = water vapour
17
Q

What are the 3 points about a solid

A
  1. strong force of attraction
  2. PARTICLES are arranged in a pattern
  3. PARTICLES don’t have alot of energy so only vibrate a little
18
Q

3 points about a liquid

A

weaker force of attraction
particles are close together but can move past eachother
more energy than a solid and move in all directions at a low speed

19
Q

3 points about gases

A
  1. No force of attraction
  2. PARTICLES have more energy than liquid or gas
  3. free to move in any direction and at any high speed
20
Q

Where does conduction of heat mainly happen

A

solids

21
Q

What is conduction of heat

A

Is where vibrating particles pass on their energy to the particles next to them

22
Q

What are materials with particles close together

A

conductors

23
Q

What does it mean when materials with particles are close together

A

bang into eachother and pass energy quickly between them

24
Q

What do materials called with large spaces between their particles

A

conduct heat much slower and are insulators

Physics (1 decks)

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