उड़ान का आनंद : ज्यां पियरे पेती द्वारा हिंदी पीडीऍफ़ पुस्तक – विज्ञान | Udan Ka Ananad : by Jyan Piyare Peti Hindi PDF Book – Science (Vigyan)
Pustak Ka Vivaran : kalpana karo hava mein LatakI ek chakatI hai. hava ka poora khamba neeche dabata hai. Parantu ek vipareet aur utana hee takatavar bal use neeche se oopar dhakka deta hai. Is tarah yah donon bal ek-doosare ko khatm ka kar dete hai. Chakati jameen jitana adhik pas hogi yah bal utane hee jyada honge………….
Description about eBook : Imagine a hanging in the air. The entire pole of air presses down. But an opposite and equally powerful force pushes him down from the bottom. In this way both of these forces end each other. The more the chawed land will pass, the more force it will be…………..
