What is Couple

What is a couple ? What effect does it have on a body ? Show that moment of couple is same irrespective of the point of rotation of the body.

What are coupled oscillations? Explain with the help of suitable examples.

(a)How does a haemophilic patient suffer? (b)A haemophilic son is born to a normal couple,Explain the mechanism of this inheritance.What is the probability of a haemophilic daughter being born to this couple?

What is a redox couple? Give one example.