Why two isotherms do not intercept each other.

Why do two isothermal curves not intersect each other?

[A] : Living organisms do not interact with each other. [R] : All living organisms have originated independently.

If two circle do not intersect or touch each other, then the maximum number of common tangents can be drawn is

The number of common tangents of two circle when they do not touch or intcrsect each other is _____

If two circles do not intersect or touch each other, then the maximum number of common tangents can be drawn is "_________"

Why do two streamlines never cross each other?

Two radii OA and OB of a circle with centre O are perpendicular to each other. If two tangents are drawn at the point A and B intersect each other at the point T, prove that AB= OT and they bisect each other at a ridght angle.