Physics
Air moves from the region where the air ________

Pressure is high to the region where the pressure is low
Humidity is high to the region where the humidity is low
Pressure is low to the region where the pressure is high
Humidity is low to the region where the humidity is high

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Physics
Rainbows are produced when sunlight :

Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction
None of the given statements is correct.
Incident on raindrops hanging in the atmosphere is dispresed after suffering reflection.
Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.

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Physics
When a pail of water is swung in a vertical circle, the water does not fall out at the top of the loop when the speed is

Above a certain minimum value depending on amount of water in the pail
Above a certain minimum value irrespective of amount of water in the pail
Below a certain minimum value depending on amount of water in the pail
Below a certain minimum value irrespective of amount of water in the pail

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