Throughout pregnancy, the uterus undergoes periodic episodes of weak and strong contraction. What are they?

Which layer of uterus undergoes strong contractions during parturition?

Assertion: Vigorous contraction of the uterus at the end of pregnancy causes expulsion. Reason: The stimulatory reflex between the uterine contraction and oxytocin secretion results in weakening contractions.

Assertion: The endometrium undergoes cyclical changes during menstrual cycle. Reason: The myometrium exhibits strong contractions during delivery of the baby.

What is the half life period of tritium? How is it undergoes radioactive disintegration?

A small body of mass 100 g is undergoing SHM of amplitude 100 cm and period 0.2 s. What is the maximum value of the force acting on the body ?