Page 63 - SP015 Past Years PSPM Chapter 6 -14 Ver 2020

PSPM SP015

PSPM JUN 2000/2002 SF015/2 No. 13(c)

20. When metal rod A of 100 cm long is heated from 0 C to 100 C, it experiences
elongation of 0.080 cm. While metal B of the same length will experience elongation of
0.035 cm at the same temperature range.

(a) Calculate the coefficient of linear expansion of metal A and metal B. [2 m]

(b) 100 cm

Metal A Metal B
FIGURE 12.5

If metal rod C is a combination of both metals A and B as shown in
FIGURE 12.5 experiences elongation of 0.070 cm when heated from 0 C to
100 C, determine the original length of both metals. [4 m]

PSPM 2001/2002 SF015/2 No. 7

21. A man uses a measuring tape made from iron. If the length of the tape is 500.00 cm at
room temperature 25 C, calculate the extension of the length of the tape at temperature
35 C.
-1
-5
(Coefficient of linear expansion of iron,  iron = 1.2  10 K ) [3 m]

PSPM 2006/2007 SF017/2 No. 7(a)

22. The surface of a space shuttle is hot due to air resistance during the re-entry into the
Earth atmosphere. The temperature of the shuttle during this re-entry is 215 C.
Calculate the fractional change in its length if the take-off temperature of the shuttle is
-1
-6
23 C and its coefficient of linear expansion is 24  10 K . [2 m]

PSPM 2008/2009 SF017/2 No. 7

-5
-1
23. The coefficient of linear expansion of aluminium is 2.6 × 10 K .

(a) What is meant by this value? [1 m]

(b) An aluminium cube with side 0.2 m is heated from 20 C to 80 C. Calculate the
increase in volume of the cube. [3 m]

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