During lightning and thunder we should avoid standing in ground and spaces Why?

A helicopter on flood relief mission, flying horizontally with a speed u at an altitude H, has to driop a food packet for a victim standing on the ground. At what distance from the victim should the packet be dropped? The victim stands in the vertical plane of the helicopters's motion.

a. A comb run through one's dry hair attracts small bits of paper. Why? What happens if the hair is wet or if it is a rainy day? (A paper does not conduct electricity.) b. Ordinary rubber is an insulator. But special rubber tyres of aircraft are made slightly conducting. Why is necessary? c. Vehicles carrying inflammable materials usually have metallic ropes touching the ground during motion. Why? d. A bird perches on a bare high power line, and nothing happens to the bird. A man standing on the ground touches the same line and gets a fatal shock. Why?

During a thunderstorm if you notice a 3 second delay between the flash of lightning and sound of thunder. What is the approximate distance of thunderstorm from you.

Name any three foods that are to be avoided and included in the diet of a diebetic patient. Why should it be followed ?

Why should we give first aid? (4 points)

Why should we avoid use of synthetic soft drinks?

Why is it safer to be inside a bus than standing under a tree on in open ground during lighning?

To avoid trasmission of STIs we should (i) Avoid sex with multiple partners (ii) Always have unprotected sex (iii) Use condoms during coitus (iv) Avoid sex with unknown partners (v) Avoid sharing of needles

Why should we breed animals?