Question 22
Question 22 of 40
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Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
3. Waves
3.4. Sound

State the approximate range of frequencies audible to humans as 20Hz to 20000Hz

2. Thermal physics
2.3.4. Consequences of thermal ener...

Explain everyday applications using ideas about conduction, convection and radiation, including: (a) heating objects such as kitchen pans (b) heating a room by convection (c) measuring temperature using an infrared thermometer (d) using thermal insulation to maintain the temperature of a liquid and to reduce thermal energy transfer in buildings

2. Thermal physics
2.2.1. Thermal expansion of solids,...

Explain applications and consequences of thermal expansion in the context of common examples, including the liquid-in-glass thermometer