The incidences of STDs are high among persons in the age group of 15-24 years:-
What is STD?

The incidences of STDs are high among persons in the age group of 15-24 years:- What are the principles you have follow to prevent it?

The incidences of STDs are high among persons in the age group of 15-24 years:- Name some common STDs (Any four).

In a Van de Graff type generator a spherical metal shell is to be a 15 xx10^(6)V electrode. The dielectric strength of the gas surrounding the electrode is ' 5 x 10^(7) V /m'. What is the minimum radius of the spherical shell required? (You will learn from this exercise why one cannot build an electrostatic generator using a very small shell which requires a small charge to acquire a high potential)

A man’s age after 15 years will be the square of his age 15 years ago. What is his present age?

The weakest reducing agent among the hydride of groups 15 elements is …………………….

IQ of a person is given by the formula IQ = (MA)/(CA) xx 100 , where MA is mental age and CA is chronological age. If 80 le IQ le 140 for a group of 12 years old children find the range of their mental age.

A small fragment of skin of a different person was extracted from the nails of a murdered person. This fragment of skin led the crime investigators to the murderer. Based on this incident answer the following questions: What is the procedure involved in this technique?