3. The ability of an object to absorb (menyerap) and give out (bebaskan) heat
depends on its surface.
The surface are:
- dark and dull (gelap dan pudar)
- white and shiny (cerah dan berkilat)
ABSORBING AND GIVING OUT HEAT
4. ABSORBING AND GIVING OUT HEATABSORBING AND GIVING OUT HEAT
Depends on
SURFACE
(PERMUKAAN)
SURFACE
(PERMUKAAN)
DARK and DULL
(GELAP dan PUDAR)
DARK and DULL
(GELAP dan PUDAR)
WHITE and SHINY
(PUTIH dan BERKILAT)
WHITE and SHINY
(PUTIH dan BERKILAT)
GOOD heat absorber
GOOD heat radiator
BAD heat reflector
GOOD heat
reflector
BAD heat absorber
BAD heat radiator
is a is a
5. OBJECTS TYPES OF SURFACE EXPLANATION
1) Wall
painted with
white colour
white surface • white colour surface
is a good heat
reflector and can
keep house in cold
condition.
2) Pots and
kitchen
utensils
painted
silver colour
• shiny surface • silver colour surface
is a bad heat radiator
to retain more heat.
APPLICATIONS OFTHE ABSORPTION
AND RADIATION OF HEAT
6. To show that dark and dull surface is a good heat radiator.
EXPERIMENT:
White and shiny Dark and dull
50 º C