Question

please explain the activity of 11.9on book of science class 8 ncert of kendr

Answer 1

Answer:

In this activity, we have to take a bottle and fix a cylindrical glass tube, a few cm long near its bottom as shown in Fig. 11.15. You can do so by slightly heating one end of the glass tube and then quickly inserting it near the bottom of the bottle. Make sure that the water does not leak from the joint. If there is any leakage, seal it with molten wax. Cover the mouth of the glass tube with a thin rubber sheet as you did in Activity 11.8. Now fill the bottle upto half with water.

The rubber sheet or ballon will bulge, since the fast moving molecules of water exert pressure on it, similarly it would be offering pressure on walls of bottle.

Answer 2

Answer:

ok.........

mark it as brainlist answer