Question
Find the number of zeros at the end of
78!.Solution
Number of zeros will depend on the number of 10s. Since, 10 = 5 X 2, number of 10s will depend on number of 5s. {Since, number of 2s will always be more} So, number of fives at the end of 78! = [78/5] + [78/25] {Where [] is greatest integer} = 15 + 3 = 18
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?
