Why do two eye give better vision than one ?

Because two eyes do not form exactly similar images and the fusion of these two dissimilar images in the brain gives three dimensions of the stereoscopic vision.


Posted by : Vishal.Kalgutkar

Why is it dangerous to sleep under a tree at night ?

Plants respire at night and give out carbon dioxide which reduces the oxygen content of air required for breathing




Posted by : Vishal.Kalgutkar

How does ink get filled in a fountain pen ?

When the rubber tube of a fountain pen is immersed in ink is pressed, the air inside the tube comes out and when the pressure is released the ink rushes in to fill the air space in the tube.




Posted by : Vishal.Kalgutkar

Why are ventilator in a room always made near the roof ?

The hot air being lighter in weight tends to rise above and escape from the ventilator at the top. This allows the cool air to come in the room to take its place.




Posted by : Vishal.Kalgutkar

Why do we place a wet cloth on the forehead of a patient suffering from high temperature ?

Because of body’s temperature, water evaporating from the wet cloth produces a cooling effect and brings the temperature down.




Posted by : Vishal.Kalgutkar

Why cannot a petrol fire be extinguished by water ?

Water, which is heavier than petrol, slips down permitting the petrol to rise to the surface and continue to burn. Besides , the existing tempature is so high that the water poured on the fire evaporates even before it can extinguish the fire. The latter is true if a small quantity of water is poured.




Posted by : Vishal.Kalgutkar

Who will possibly learn swimming faster – A fat person or a thin person?

The fat person displaces more water which will help him float much more freely compared to thin person.




Posted by : Vishal.Kalgutkar