The age of a tree can be known by examining________?

Compared to mild steel, cast iron has (1) high compressive strength (2) high tensile strength (3) low compressive strength (4) low tensile strength The correct answer is________?

The optical property of a water body depends on?

The process in which the chlorination is done beyond the break point is known as________?

Center of percussion is________?

Due to perturbation of the orbit, satellite orbit parameters are frequently updated on measurements carried out by its________?