Just Prove

The pressure just below the meniscus of mercury compared to pressure just above is

Just prior to ovulation, there is:

A tower subtends an angle alpha at a point A in the plane of its base and the angle of depression of the foot of the tower at a point b metres just above A is beta .Prove that the height of the tower is b tan alpha cot beta .

(P) The year / (Q) that has just ended / (R ) has proved to be disatrous / (S) for my uncle's family The correct sequence should be

___ is composed of just one cell layer.

What comes just before 9900000 ?

What comes just before 1000000 ?