DATA LOGGING

GROUP MEMBERS

NOR HAFIZAH ISMAIL

NURHAYATI AMIRUDIN

SITI NURHAFIZA

MUHAMMAD NAWI

INTRODUCTION

The concept of heat transfer and the

various mechanisms that result in

heat transfer:

• a) Conduction

• b) Convection

• c) Radiation

ENGAGE

I can remember as a kid having one dull black

thermos bottle that came with my lunch box. One

day my mother might put grape juice in it and at

lunch, I would have nice, cold grape juice. The next

day she would put hot soup in it and I would have

hot soup for lunch. Moreover, I can remember

asking, "How does it know whether to keep stuff hot

or cold?" Where's the switch, in other words,

similarly, "You heat things up in an oven and cool

them down in a refrigerator. How come this thing

can do both?"

QUESTION

How the thermos bottles keep the food

warm and cool?

How a thermos bottle prevents heat transfer

to the outside by using a vacuum between

the walls of the bottle?

What is a link between the colour of the flask

and how quickly the heat was lost?

Why one coloured flask cooled more quickly

than another did?

What made up the wall of the flask?

EMPOWER

Objective: To investigate how colour can affect the heat lost through radiation.

Hypothesis: Black colour absorbed more heat than light colour. The light colour reflect more heat.

Equipment required:

- DrDAQ data logger connected to a PC

-Two external temperature probes (DD100)

-One 250 ml conical flask painted black and one with silver foil around it

-A kettle or other resource to boil water

-Two pieces of insulating material to place over the top of the flasks be (these will have to be made with a small hole to let the temperature probe into the flask)

-Two clamp stands

Experiment Procedure

• Both the conical flasks is filled with boiling water

• The insulating covers is placed over the top of the flask

• The temperature probes is placed in the flasks

• The temperatures of the flasks is started recording(15 minutes should be long enough)

RESULT

ENHANCE

Planning a further experiment.

These questions below help us to find the solution

how to improve this product to be more attractive

and funky.

Can you design an experiment to discover if

different coloured flasks full of water would heat up

more quickly than others would? Show your

teachers your design

Why was an insulating cover placed over the top of

the flask?

EXTENSION

Example of Greenhouse Plant

-Light from the sun passes through the roof of the

greenhouse to heat the plants and ground inside.

-Once the solar radiation reaches the surface of the earth,

the greenhouse structure is the next obstacles it has to

pass through.

-The roof and wall are usually opaque and absorb or reflect

of the light.

-A greenhouse is build with the glass walls and glass roof.

- It allow a visible light to enter unhindered, where it

warms the interior as it is absorbed by the material

within.