If action and reaction are equal and opposite, why do they never cancel each other?

Why do two streamlines never cross each other?

Why two isotherms do not intercept each other.

The electric and magnetic field of electromagnetic waves are - (A) In opposite phase and perpendicular to each other. (B) In opposite phase and parallel to each other. (C) In the same phase and perpendicular to each other. (D) In the same phase and parallel to each other.

The electric and magnetic field of electromagnetic waves are- in opposite phase and perpendicular to each other in oppopsite phase and parallel to each other in the same phase and perpendicular in the same phase and parallel to each other.

While antacids and antiallergic drugs interfere with the function of histamines, why do these not interfere with the function of each other?

Why is the heat of reaction of a reaction occurring in a bomb calorimeter equal to the change in internal energy of the reaction system?

Show that the diagonals of a square are equal and right bisectors of each other.

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