4. Take a sheet of paper. Draw a spiral on it as shown in the Fig. 4.14. Cut out the paper along the line. Suspend the paper as shown in Fig. 4.14 above a lighted candle. Observe what happens. Think of an explanation.
Answer: The above activity can be carried out as follows:
Aim: To observe what happens to the suspended paper spiral above the lighted candle and conclude.
Materials Required: Sheet of paper, pen, lighted candle.
Procedure:
(i) Draw a spiral on the sheet of paper with the pen as shown in figure (a). Cut out the paper along the line.
(ii) Suspend the paper above the lighted candle and observe what happens.
Observations: The suspended paper spiral will start spinning.
Conclusions: Heat transfer will happen due to convection. Due to convection, the hot air just above the flame will rise and the cool air from the sides will replace it. This convectional movement of air causes the suspended paper spiral to spin.
“Take a sheet of paper. Draw a spiral on it as shown in the Fig. 4.14. Cut out the paper along the line. Suspend the paper as shown in Fig. 4.14 above a lighted candle. Observe what happens. Think of an explanation.” – Solved.
Related Links:
Solution to Extended Learning Problem 1
Solution to Extended Learning Problem 2
Solution to Extended Learning Problem 3
Solution to Extended Learning Problem 5
Solution to Activity 3.1
Solution to Activity 3.2
Solution to Activity 3.3
Solution to Activity 3.4
Solution to Activity 3.5
Solution to Activity 3.6
Solution to Activity 3.7
Solution to Activity 3.8
Solution to Activity 3.9
Solution to Activity 3.10
Solution to Activity 3.11
Solutions to Chapter 3 Heat
