Answer the following question:
Arun are provided with an experimental setup as shown in Fig.(a) and (b). Observe the given image and answer the following questions:
1. On keeping the test tube (Fig. b) in a beaker containing hot water ( \(∼70\ °C\)), the water level in the glass tube rises. How does it affect the density?
2. If the water in the beaker is allowed to cool after heating, what change would you expect to observe in the water level inside the glass tube?