Copy of 8Kc gamma controlling transfer (10/22/2024)

Posljednje ažuriranje 9 months ago

10

1

Which type of heat transfer is reduced by insulators?

conduction, radiation and convection

Conduction

Radiation

Convection

Why do houses have an insulated attic?

For storage space

To prevent fire

To maintain the structure

To reduce heat loss

What principle does insulation work on?

Condensation of moisture

Trapping air to prevent heat transfer

Absorbing heat

Reflecting heat

Why does a vacuum flask have a double-walled container?

For enhanced durability

Makes the flask look larger

To create a vacuum between for insulation

To hold more liquid

Neoprene is a good insulator because

it is waterproof

it has air pockets

it is a good conductor

it floats

A wet suit works to keep a diver warm by

keeping the diver dry

preventing energy transfer

giving the diver air

making the diver wet

A wetsuit must fit well to avoid

water flow between suit and diver

air pockets developing

shark attack

blood circulation

When divers wear a thick wetsuit, in really cold water, they need extra weight to help sink under water because

cold water is less dense

divers want more time underwater

the tiny air pockets make neoprene float

hot divers float better

A difference between drysuits and wetsuits

drysuits trap water near the skin

wetsuits trap water near the skin

drysuits have thicker neoprene

wetsuits trap neoprene near the skin

Drysuits keep a diver warm in cold water because the diver

is uncomfortable

the diver gets in warm water

the diver stays above water

wears warm dry clothes