PAPER 3 SECTION A

1. PAPER 3 SECTION A QUESTION NO. 1

2. What instrument will be tested? • Lever balance ? • Tripple beam balance ? • Thermometer ? • Micrometer screw gauge ? • Manometer ? • Protractor ?

3. 30 20 40 32 30 31 30 29 Taking Reading 28.5 36 31.7  = …………… C  = …………… C  = …………… C

4. 15 l2 l1 14 13 12 Taking Reading 14  = ……………  14.0 l1 = ……….. cm 14.7 4.6 l2 = ……….. cm t= …………… s

5. Taking Reading 100.0 g Initial mass of liquid X (Figure 3.2) = …………………. 78.7 g Final mass of liquid X (Figure 3.3) = …………………. 84.2 g Final mass of liquid X (Figure 3.4) = …………………. 87.5 g Final mass of liquid X (Figure 3.5) = …………………. 92.0 g Final mass of liquid X (Figure 3.6) = …………………. 96.7 g Final mass of liquid X (Figure 3.7) = ………………….

6. Answering Questions Area 1 (a) Manipulated variable = ………………………………….. Rate of evaporation / Mass 1 (b) Responding variable = ………………………………….. Temperature / density 1 (c) Constant variable = ………………………………….. / humidity / speed of air flow

7. Answering Questions 96.7 20.0 3.3 92.0 40.0 8.0 87.5 60.0 12.5 84.2 80.0 15.8 78.7 100.0 21.3

8. Answering Questions m/g x 20 x 15 x 10 x 5 x A/cm2 20 40 60 80 100

9. Answering Questions 1 (e) State relationship …………………………………………………………………….. m is linearly increasing with A m A