Take a small cotton ball and place it in a tumbler/bowl filled with water. Observe it for atleast 10 minutes. Will it float or sink in water and why?
In an activity, a teacher dissolved a small amount of solid copper sulphate in a tumbler half filled with water. Which method would you use to get back solid copper sulphate from the solution?
Which pair of substances among the following would float in a tumbler half filled with water?
A hollow lens is made of thin glass and in the shape of a double concave lens. It can be filled with air, water of refractive index 1.33 or CS_(2) of refractive index 1.6 . It will act as a diverging lens if it is
What type of energy is possessed by flowing water ?
If the space between the lenses in the lens combination shown were filled with water, what should happen to the focal length and power of the lens combination ?
