A glass filled with water is covered with a thick
card. The glass is turned upside down with
card pressed to its mouth with hand. What
happens when the hand pressing the card is
gently removed? Write your observation with
reason.
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Answer:
Keep the palm of your hand placed on the card and turn the glass upside down. ... This happens because the air pressure exerted on the card from underneath is greater that the weight of the water inside the glass
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