Soft Skills is all about SMARTNESS which comes through Awareness & Humbleness.
Everyday Science
(Source: www.google.com / www.wikipedia.com)
(Source: www.google.com / www.wikipedia.com)
Q. Why does a piece of Iron get rusted if left exposed in the open?
Ans. Iron piece rusts if left exposed in the open because it reacts with the oxygen in the air, forming iron oxide—a compound of Iron and oxygen.
Q. Why can petrol fire not be put out with water ?
Ans. Petrol is a hydro carbon which remains isolated with water and is having less density. So when water is poured petrol floats on it and keeps on burning. The temperature of the burning petrol is so high that the water poured on the petrol fire is evaporated before it extinguishes the fire.
Q. Ice packed is saw dust does not melt quickly. Why ?
Ans. Saw dust is a bad conductor of heat and protects the ice from the external heat and hence from melting away quickly.
Q. White light passing through a glass prism gives rise to a coloured pattern on the wall. Why ?
Ans. White light is made up of seven colours. Rays of different colours refract or bend along different paths and fall on different points on the wall forming a coloured pattern known as spectrum.
Q. A boatman pushes the bank with his pole. Why ?
Ans. Action and reaction being equal and opposite, the bank will push the boat away from it.
Q. A burning candle gets extinguished when covered with a tumbler. Why ?
Ans. A burning candle gets extinguished when covered with a tumbler because the supply of oxygen is cut-off and the flame goes out.
Q. Why do you see rainbow after rain ?
Ans. The water drops suspended in the atmosphere act as prism and disperse light into seven colours.
Q. A metal tea-pot has an ebony handle. Why ?
Ans. Ebony being bad conductor of heat, the handle does not get hot.
Q. Why is one’s breath visible in winter, but not in summer ?
Ans. In winter the water vapour contained in the breath condenses into small droplets of water, which become visible. In summer it is not so.
Q. The weight of a man on the surface of the moon will be only about one-sixth of his weight on the earth. Why ?
Ans. The gravity of the moon is one-sixth that of the earth, hence the weight of a person on the surface of the moon will be onesixth of his weight on the earth.
Ans. Iron piece rusts if left exposed in the open because it reacts with the oxygen in the air, forming iron oxide—a compound of Iron and oxygen.
Q. Why can petrol fire not be put out with water ?
Ans. Petrol is a hydro carbon which remains isolated with water and is having less density. So when water is poured petrol floats on it and keeps on burning. The temperature of the burning petrol is so high that the water poured on the petrol fire is evaporated before it extinguishes the fire.
Q. Ice packed is saw dust does not melt quickly. Why ?
Ans. Saw dust is a bad conductor of heat and protects the ice from the external heat and hence from melting away quickly.
Q. White light passing through a glass prism gives rise to a coloured pattern on the wall. Why ?
Ans. White light is made up of seven colours. Rays of different colours refract or bend along different paths and fall on different points on the wall forming a coloured pattern known as spectrum.
Q. A boatman pushes the bank with his pole. Why ?
Ans. Action and reaction being equal and opposite, the bank will push the boat away from it.
Q. A burning candle gets extinguished when covered with a tumbler. Why ?
Ans. A burning candle gets extinguished when covered with a tumbler because the supply of oxygen is cut-off and the flame goes out.
Q. Why do you see rainbow after rain ?
Ans. The water drops suspended in the atmosphere act as prism and disperse light into seven colours.
Q. A metal tea-pot has an ebony handle. Why ?
Ans. Ebony being bad conductor of heat, the handle does not get hot.
Q. Why is one’s breath visible in winter, but not in summer ?
Ans. In winter the water vapour contained in the breath condenses into small droplets of water, which become visible. In summer it is not so.
Q. The weight of a man on the surface of the moon will be only about one-sixth of his weight on the earth. Why ?
Ans. The gravity of the moon is one-sixth that of the earth, hence the weight of a person on the surface of the moon will be onesixth of his weight on the earth.
