Page 142 - text book form physics kssm 2020

Activity 4.5 CPS STEM

Aim: To build a model of a cluster home which can overcome the problem of
extreme temperatures
Instructions:
1. Work in groups.
2. Read and understand the following information.

1 3 5 7 9 11
Cluster homes are homes which resemble
terrace houses. However, three walls of the house
are shared with the houses behind and beside it 2 4 6 8 10 12
(Figure 4.12).
Photograph 4.2 shows an example of a Figure 4.12 Plan of cluster home
cluster home which has only one door for exit
and entrance, while windows are only in the front
part of the home. Th e shape of the home can
minimize the use of land. However, when our
country experienced the El Nino phenomenon
with extreme rise in temperature, residents of
terrace cluster homes experienced extreme heat.

Photograph 4.2 Example of cluster home

3. Based on the above information, analyse the situation by listing the facts and problems
related to the condition of extreme temperature in cluster homes.
4. Brainstorm several solutions to the problems. Sketch a model based on your solutions.
5. Build the model based on the sketch.
6. Display and present the model.

Formative Practice 4.2
4.2

1. What is the diff erence between heat capacity and specifi c heat capacity?
2. How much heat energy is needed to increase the temperature of a 0.2 kg mass of gold
by 10°C?
–1
–1
[Given the value of specifi c heat capacity of gold is 300 J kg °C ]
3. A container contains 200 g of water at initial temperature of 30°C. An iron nail of mass 200 g
at temperature of 50°C is immersed in the water. What is the fi nal water temperature? State
the assumptions you need to make in your calculations.
–1
–1
[Given the value of specifi c heat capacity of water is 4 200 J kg °C and that of iron is
–1
450 J kg °C ]
–1
136 4.2.5
136
136
136
4.2.5