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How did the waiter get the water into the glass?

+2 votes
196 views

A man in a restaurant asked a waiter for a juice glass, a dinner plate, water, a match, and a lemon wedge. The man poured enough water onto the plate to cover it.
"If you can get the water on the plate into this glass without touching or moving this plate, I will give you Rs1000," the man said. "You can use the match and lemon to do this."
A few minutes later, the waiter walked away with Rs1000 in his pocket.

How did the waiter get the water into the glass?

posted Aug 4, 2014 by Rajni

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1 Solution

+2 votes

First, the waiter stuck the match into the lemon wedge, so that it would stand straight. Then he lit the match, and put it in the middle of the plate with the lemon. Then, he placed the glass upside-down over the match. As the flame used up the oxygen in the glass, it created a small vacuum, which sucked in the water through the space between the glass and the plate. Thus, the waiter got the water into the glass without touching or moving the plate.
You can try this experiment at home with appropriate supervision.

solution Feb 19, 2016 by Aman



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