Assignment 2Assignment 2

Form 1Form 1Chapter 7 : HeatChapter 7 : Heat

7.5 : Absorbing and Giving 7.5 : Absorbing and Giving Out HeatOut Heat

Practical reportPractical report Name Name : Syafiqah bt Tarmizi : Syafiqah bt Tarmizi Form Form : 1AA : 1AA Date Date : 18 / 4 / 2004 : 18 / 4 / 2004 Topic : Absorbing and Giving Out HeatTopic : Absorbing and Giving Out Heat Objective : Showing that dark, dull objects Objective : Showing that dark, dull objects

absorb heat better. absorb heat better.

HypothesisHypothesis

Dark, dull objects absorb Dark, dull objects absorb heat better than white, heat better than white,

shiny objectsshiny objects

VariablesVariables Variable that is manipulatedVariable that is manipulated

Type of surface (dark, dull or white, Type of surface (dark, dull or white, shiny)shiny)

Variable that respondsVariable that responds - - TemperatureTemperature

Variable that is kept constantVariable that is kept constant - - Surface area of the dull and shiny Surface area of the dull and shiny

objects exposed to heatobjects exposed to heat

Apparatus and materialsApparatus and materials Black painted canBlack painted can White painted canWhite painted can Cork stoppersCork stoppers ThermometersThermometers Blocks of woodBlocks of wood Metre ruleMetre rule StopwatchStopwatch Bunsen burnerBunsen burner

ProcedureProcedure1.1. Two cans of the same size are prepared Two cans of the same size are prepared

(black and white).(black and white).2.2. The two cans are arranged so that they The two cans are arranged so that they

are placed a short distance apart. A are placed a short distance apart. A bunsen burner is placed in between bunsen burner is placed in between them.them.

ProcedureProcedure

3.3. The temperature in each can is The temperature in each can is recorded.recorded.

4.4. Bunsen Burner is lightedBunsen Burner is lighted5.5. The temperature in each can is The temperature in each can is

recorded every 5 minutes.recorded every 5 minutes.

0bservations0bservationsTime Time

(second)(second) Thermometer (Thermometer (ooC)C)

Black painted canBlack painted can White painted canWhite painted can

00 2727OOCC 2727OOCC

22 2929OOCC 2727OOCC

44 3131OOCC 2828OOCC

66 3333OOCC 2929OOCC

88 3535OOCC 3131OOCC

DiscussionDiscussion The increase rate of temperature for The increase rate of temperature for

black surface was higher than than whiteblack surface was higher than than white

ConclusionConclusion Black and dull surface absorbed heat Black and dull surface absorbed heat

better than white surfacebetter than white surface