9.4 TYPES OF SURFACE AND HEAT ABSORPTION AND EMISSION

9.4 TYPES OF SURFACE AND HEAT ABSORPTION AND EMISSION

by KASMAWATI Moe

Multiple Choice

Fuel tank trucks are painted with shiny aluminium paint because...

• aluminium paint is a poor heat absorber but a good heat radiator.

• aluminium paint is a good heat absorber but a poor heat radiator.

Multiple Choice

Walls of a house are painted with bright colours because

• Bright surface are a good heat absorber.

• Bright surface are a poor heat absorber.

Multiple Choice

Why is avoiding black coloured shirt during activities under the hot sun a good idea?

• Black are poor heat absorber

• Black are good heat absorber

Multiple Choice

If we filled both cups with hot coffee, which cup of coffee will probably cools down faster, given that both cups are made up of the same material?

• The black cup

• The white cup

Multiple Choice

Why are most of the frying pans black in colour?

• The black frying pans are stronger and more durable.

• The black frying pans insulate heat better than shiny frying pans.

• The black frying pans absorb heat better.

• The black frying pans release heat better.

Multiple Choice

Sarah is going to take her children to the beach this weekend. She planned to get a huge umbrella to reduce heat from the sun. Which of the following criteria can be taken into consideration when choosing the umbrella?

• Price of the umbrella

• Height of the umbrella

• Design of the umbrella

• Colour of the umbrella

Multiple Choice

What is the feature of the wall of a thermos flask that allows it to maintain the temperature of hot water for a long time?

• The outer walls are usually painted with black colours to avoid heat emission from the inside

• The inner walls are usually made out of shiny material such as aluminium to avoid heat loss

• The inner walls are usually made out of dark and dull material to avoid heat loss

• The outer walls are usually painted with black colours to absorb heat

Multiple Choice

The diagram shows a simple form of solar water heater. Which tubing would give the hottest water from the outlet?

• Plastic, painted black

• Plastic, painted white

• Copper, painted black

• Copper, painted white

Multiple Choice

Four different closed vessels contain equal amounts of ice.

Which vessel would take the shortest time for all the ice to melt?

• A

• B

• C

• D

Multiple Choice

A piece of aluminium foil is used to wrap around food to be cooked in an oven. The foil has a shiny side and a dull side. Which side should be on the outside and why?

• The dull side should be on the outside because it absorbs heat by radiation faster.

• The shiny side should be on the outside because it is a better heat absorber.

• The dull side should be on the outside because it helps to reduce heat loss.

• The shiny side should be on the outside because it is a good heat radiator.

Multiple Choice

Why is the fuel tank on an oil tanker truck painted in shiny colours?

• Shiny colours are good heat absorbers

• Shiny colours are good radiator of heat

• Shiny colours are weak heat absorbers

• Shiny colours make the truck looks nicer

Multiple Choice

The silver surface of the teapot retains heat longer. This is because

• The silver is a weak heat radiator

• The silver is a good heat radiator

Multiple Choice

Walls of a house are painted with bright colours because

• Bright surface are a good heat absorber

• Bright surface are a poor heat absorber

Multiple Choice

Why is avoiding black coloured shirt during activities under the hot Sun a good idea?

• Black are weak heat absorber

• Black are good heat absorber

Multiple Choice

Which can is a better heat absorber and radiator

• The dark can

• The white can

Multiple Choice

If we filled both glass with hot coffee, which cup of coffee will probably cools down faster, given thay both cup made up of the same material?

• The black cup

• The white cup

Multiple Choice

Which surface is a better heat absorber and radiator

• Dark, dull surface

• White, shiny surface

Multiple Select

Sarah is going to take her children to the beach this weekend. She planned to get a huge umbrella to reduce heat from the sun. Which of the following criteria can be taken into consideration when choosing the umbrella?

• Type of material

• Height of the umbrella

• Colour of the umbrella

• Flexibility of the umbrella

Multiple Choice

Why are most of the frying pans black in colour?

• The black frying pans are stronger and more durable.

• The black frying pans insulate heat better than shiny frying pans.

• The black frying pans absorb heat better.

• The black frying pans release heat better.

Multiple Choice

What colour of clothing is most suitable to be worn during hot weather?

• Black

• White

• Red

• Dark green

Multiple Choice

An object with ______________ surface is a good absorber of heat.

• shiny

• bright

• dark

• rough