General Knowledge :: Physics
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Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this?
- I.Diffusion
- II.Refraction
- III.Internal reflection
- Natural radioactivity was discovered by
- Planets are
- Mica is used in electrical appliances such as electric iron because mica is
- It is easier to roll a barrel full of coal tar than to pull it because
- Minimum number of unequal vectors which can give zero resultant are
- Intensity of sound has
- Rain is falling vertically downwards. To a man running east-wards, the rain will appear to be coming from
- An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is
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