अस्सी मिनट में दुनिया की सैर : ज्यां पियरे पेती द्वारा हिंदी पीडीऍफ़ पुस्तक – बच्चों की पुस्तक | Assi Minut Mein Duniya Ki Sair : by Jean Pierre Peti Hindi PDF Book – Children’s Book (Bachchon Ki Pustak)
Pustak Ka Vivaran : Taral Edhan ke upayog dvara in Samasyaon se Nibata ja sakata hain. Isake liye Taral Edhan ko jvalan chembar ke andar pamp karana hoga aur chembar kako Aag ki prachand Garmi se Bachana hoga. Saval yah hai ki oopar Edhan jalega kaise ? Jaise-jaise Rocket oopar uthega, vaise-vaise hava (oxison) ki Matra kam hogi. Bahut oopar Nirvat mein bilkul bhi hava nahin hogi………
Description about eBook : These problems can be overcome by the use of liquid fuel. For this, the liquid fuel has to be pumped inside the ‘burning chamber’ and the chamber will have to be protected from the intense heat of the fire. The question is, how will fuel burn up? As the rocket rises, the amount of air (oxygen) will work. At the very top there will be no air in the vacuum ……
