three cheers for me.
HELLO! my name is
LIYING.
I am from
3B1!
Dis blog is bout chapts
7, 8 & 9!
chapt SEVEN: Kinetic Model Of Matter
chapt EIGHT: Transfer Of Thermal Energy
chapt NINE: Thermal Properties Of Matter
ENJOY YEA..! :)
hope u'll learnt somethingggg! HAVE FUNNN!
4:42 AM
Friday, September 5, 2008
Factors which affects RATE OF INFRARED RADIATION1. Colour / texture of surface
BLACK- better absorbers, emitters of infrared radiation2. Surface Temperature~ higher temp of surface relative to surrounding temp, the higher rate of infrared radiation3. Surface Area
~ object with larger surface area, emits infrared radiation at higher rate
USES OF GOOD CONDUCTORS OF HEAT
1. Cooking Utensils
+ direct heating is involved
frying pan
cooking pot
saucepan
kettle
2. Soldering Iron Rods
+ copper is a better conductor of heat than iron
3. Heat Exchangers
+ save energy
USES OF BAD CONDUCTORS OF HEAT
1. Handles of Appliances or Utensils
+ hot surfaces can b picked without scorching our hands
teapot
handle of saucepan
2. Table Mats
+ can be placed on without damaging tabletop
table mat made of cork
3. Sawdust
+ cover ice block to reduce melting
sawdust
4. Wooden Ladles
+ for scooping or stirring hot soup
wooden ladles
ladle
5. Woollen Clothes
+ to keep people warm duing cold days
woolleen clothes
6. Fibreglass, felt, Poylstyrene foam+ trap large amt of air
fibreglass
