Which country was first to organise and initiate reproductive health Programmes at national level?

Which is the sign of initiation of reproductive maturity in girl? a.When menstruation occurs b.When embryo is carried c.When she arrives at menopause stage d.Before ovulation

A group of college students shared their phone number on social media. They insist the people to donate their used clothes, books, toys, utensils, etc. They collect such used items and distribute to the needy. 'Robinhood' is a well-known name at national level. Members of this group collect the food that is left in restaurants and at the occasion of marriage and distribute to needy. How many and which R's come into play in this initiative?

Which organism is having cellular level of organisation?

A particle of mass 2m is connected by an inextensible string of length 1.2 m to a ring of mass m which is free to slide on a horizontal smooth rod. Initially the ring and the particle are at the same level with the string taut. Both are then released simultaneously. The distance in meter moved by the ring when the string becomes veritcal is :-

A stone is tied to an elastic string of negligible mass and spring constant k. The unstretched length of the string is L and has negligible mass. The other end of the string is fixed to a nail at a point P. Initially the stone is at the same level as the point P. The stone is dropped vertically from point P. (a) Find the distance 'y' from the top when the mass comes to rest for an instant, for the first time. (b) What is the maximum velocity attained by the stone in this drop ? (c) What shall be the nature of the motion after the stone has reached its lowest point ?