Jokes of the day!

Narak Bhi Swarg Hai 

Ek Baar Mein Sharaab Ki Bottle Lekar Ghar Ki Taraf Jaa Raha Tha Ki Raaste Mein Apne Pados Mein Rehne Waale Pandit Ji Mil Gaye Aur Meri Daaru Ki Botal Dekh Ke Kahne Lage: Bhai, Tum Sharaab Peete Ho, Tum Toh Pakka Narak Mein Jaoge. Maine Pandit Ji Se Poocha: Lekin Pandit Ji, Koi Sharaab Bechta Hai Tabhi Toh Main Kharidta Hun. Us Suresh Ka Kya Hoga, Jo Sharaab Bechta Hai? Kya Vo Bhi Narak Mei Jayega? Pandit Ji: Haan Haan Vo Bhi Narak Mein Jayega. Maine Phir Pucha: Aur Us Suresh Ka... Jo Sharaab Ki Dukaan Ke Bahar Chicken Bechta Hai? Pandit Ji: Vo Bhi Mein Narak Mein Hi Jalega. Maine Phir Pucha: Aur Vo Naachne Wali Lolita Ka Hoga? Pandit Ji: Vo Bhi Nark Mien Jayegi. Maine Phir Khush Hote Hua Kaha: Phir Koi Dikkat Nahin Hai Nark Jaane Mein? Sharaab Waala Wahan Hoga; Chicken Waala Wahan Hoga; Naachne Waali Ladki Wahan Hogi... Apne Saath Peene Waale Saare Dost Wahan Honge... Apne Liye Toh Wahi Swarag Hua Hai. Pandit Ji Ab Mere saath Baithe Hain, 3 Peg Lagane Ke Baad Salad Kaat Rahe Hain... Lekin Selfie Lene Se Mana Kar Rahe Hain.

Why are Days Longer & Shorter? I was working in a scrap yard during summer vacation at an engineering university. I worked repairing construction equipment. One afternoon, I was taking apart a piling hammer that had some very large bolts holding it together. One of the nuts had corroded on to the bolt, so to free it I started heating the nut with an oxyacetylene torch. As I was doing this, one of the dimmest apprentices I have ever known came along. He asked me what I was doing. I patiently explained that if I heated the nut, it would grow larger and release its grip on the bolt, so I could then remove it. "So, things get larger when they get hot, do they?" he asked. "Yes," I said. "That's why days are longer in summer and shorter in winter." There was a long pause, then his face cleared. "You know, I always wondered about that," he said. Oh! now I understand , as to why, Winter vacation which are normally of ten day's duration, Expands to two month's in Summer! SV=WV+ WV X 6 ( Ts-Tw) Thank you Physics! Jokes apart,be serious now and reply to my question: When heated both the nut and bolt expand Why does it gets loosened? Ans: Expansion= MST ( Mass,Specific heat,Rise in Temperature) Now, since the nut's radius is slightly greater than the bolt's, and since the increase is proportional to the rest length, the nut expands a little more. Iron has a thermal coefficient in the 10-5 / K ballpark. It means that for each 1 K increase in temperature you have an increase in size of 10-5: a 1 m rod becomes 1.00001 m long. If your bolt has r = 1.5 mm, and the nut has R = 1.501 mm, what happens is temperature is increased of 500 K? Well: r = 1.5*(1+500*10-5) mm = 1.5075 mm R = 1.501*(1+500*10-5) mm = 1.508505 mm As you can see, before heating R - r = 1 μm, while after R - r ≈ 1.001 μm. It increased! -Tejinder Kamboj