take a small glass bottle filled with coloured water up to half of its volume and close it with a single hold cork as shown in the picture insert a transparent tube inside the bottle.now roll the glass bottle between your palms are shown in the picture observe the water level in the tube and write here
whatwhat is the change that has taken place inside the bottle due to rubbing by palms why??
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between your palms are shown in the picture observe the water
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