Question
 What is the length of the bridge which a man riding 35
km an hour can cross in 3 min.?Solution
Speed = 35 km/hr, Time = 3 minutes = 3 x 60= 180 seconds, Distance = ? Distance = Speed `xx`  Time = 35 `xx`  (5/18) `xx` 180  = 1750 m      Â
Sound of frogs can be heard from a long distance in a rainy season because
A ray of light from the object parallel to principal axis of a concave lens, after refraction appears to diverge from which point on the same side of th...
Which material has the lowest refractive index?
This relationship between the angles of incidence and refraction and the indices of refraction of the two media is known as ________.
Among the following materials, which is not an insulator?
The blades of a moving jet engine are an example of:
The splitting up of white light into seven colours on passing through a glass prism is called as
What is the colour of neutral wire?
1) Red
2) Green
3) Black
4) Yellow
One Kilowatt hour is equal to—
In which material does sound travel the fastest?
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