Question

Observe and discuss.
Take some water in a plastic cup and hold a straw
upright in it. Hold a small piece of another strow near
the upper end of the first straw and perpendicular to that
straw. Blow hard through the small piece of straw. You
will see a fountain of water. Why did this happen?
On blowing through the straw, the air at its open
end is pushed away and hence the pressure of the air at
the opening goes down. As the pressure of the air near
the upper end of the creet straw becomes less than
atmospheric pressure, the water in the cup is pushed from
where the pressure is higher to where it is lower, that
is, in the upward direction, and the water comes out in
the form of a fountain. The more forcefully you blow
the higher will be the fountain. This straw fountain works
on Bernoulli's principle. in hindi explanation​

Answer 1

प्लास्टिक के कप में थोड़ा पानी लें और एक पुआल को पकड़ें

इसमें ठीक है। पास में एक और तने का एक छोटा सा टुकड़ा पकड़ो

पहले पुआल और उस के लंबवत ऊपरी छोर

स्ट्रॉ। छोटे के माध्यम से कड़ी मेहनत करें