Why we compare arteries like tree which divides into smaller and smaller branches.

Why do compare arteries like tree which divides into smaller and smaller branches?

Which is greater? Which is smaller among the given angles?

How do we compare a place which is hot with a place which is cool?

How do farmers separate grains which are bigger in size from the smaller ones? What do they do with them ?

Two concentric circles of radii 10 cm and 6 cm are drawn . Find the length of the chord of the larger circle which touches the smaller circle .

Two concentric circles of radii 5 cm and 3 cm are draw . Find the length of the chord of the larger circle which touches the smaller circle .

Two concentric circles of radii 25 cm and 24 cm are drawn. Find the length of the chord of the larger circle which touches the smaller circle.

A spherical soap bubble of radius 1 cm is formed inside another of radius 3 cm. The radius of a single soap bubble which maintains the same pressure difference as inside the smaller and outside the larger soap bubble is

A spherical soap bubble of radius 1 cm is formed inside another of radius 3cm. The radius of single soap bubble which maintains the same pressure differences as inside the smaller and outside the larger soap bubble is ....cm

We wish to obtain an erect image of an object using a concave mirror of focal length of 15 cm. What should be range of distance of the object from the mirror ? What is the nature of the image ? Is the image larger or smaller than the object ?