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  THE FIRST ATOM BOMB Three weeks had passed since the two atomic bombs had been dropped on Hiroshima and Nagasaki, but we still knew practically nothing about the fate of the devastated towns or of the innumerable victims. The American wireless had broadcast a very great deal about the preparations made for the use of the new weapon and about its extraordinary power, but information concerning the effects of atomic bombardment was limited to the horrible prophecy' for seventy years at least the radio-activity of the earth around the scene of the explosion will prevent all forms of life from existing there'  The Americans I had met the evening before on board the Benevolence had all fallen silent the moment I had mentioned the word 'Hiroshima'. When they questioned me about Japan they carefully avoided all mention of it, and when I uttered the word I think we all felt an indefinable sense of discomfort.  For different reasons the Japanese also maintained complete silenc...

                                    SPARROWS The SUN was setting behind the mango grove which fringed the western extremity of the village when Rahim khan returned from the fields. Broad and strong despite his fifty odd years, with the plough on his shoulders, and driving his two oxen, he walked through the main street of the village with a haughty and unfriendly air. As he approached the chaupal' where a dozen or so peasants were collected for their evening smoke, the hilarious* tones of gossip died down to cautious whispers. It was only when he had vanished round the corner and the heavy tread of his footsteps was heard no more that Kallu, passing the communal' hookah to another, remarked, "There goes the hard-hearted devil!" To which Nanha, the fat sweet-seller, added, "He is getting worse and worse every day. Only yesterday he beat poor Ramoo's child for throwing a pebble at his oxen." Ramnath,...

     ADVISING BROTHER TO IMPROVE HIS                                       HEALTH  You are Rohit Verma, living at 27, Gandhi Nagar, Delhi. Your younger brother is a bookworm. He is good at studies but weak in health. Write him a letter, advising him to take part in games.  27 Gandhi Nagar Delhi 12 April....  Dear Kapil Your friend, Ashok, met me a few days ago. He told me that you have become a bookworm. You do not care at all about your health. You do not take part in games. It is not good on your part. Games are a part and parcel of education. Health is wealth. You can't have a sound mind without a sound body. No doubt,you are good at studies, but you have a very poor health.  advise you to be careful about your health. You should go out for a walk daily. ake part in games also. You must improve your health. One can't enjoy one's life without good heal...

UNIT = VIII                               CHAPTER 1       FIRST LAW OF THERMODYNAMICS THERMAL EQUILIBRIUM AND TEMPERATURE  Two systems are said to be in thermal equilibrium with each other, if they are at the same  temperature    Thus, the temperature is a property,which determines whether the two systems will be in thermal equilibrium or not. In other words, temperature is a thermodynamic property of all the systems, such that any two systems having the same temperature must be in thermal equilibrium. ZEROTH LAW OF THERMODYNAMICS It states that if tuo systems A and B are in thermal equilibrium with a third system C, then A and B must be in thermal equilibrium with each other.    Fig. 1.01 shows two systems A and B separated by an adiabatic wall (a wall which does not allow heat flow). The two systems are placed in contact witha third system C with a Diathermic wall (a...

                                    1.                      An Indian Festival Diwali is an important Indian festival. It generally falls in the month of November. It comes twenty days after Dussehra. Shri Ram cames back to Ayodhya on this day. Shri Guru Hargobind was set free by the Mughal Emperor on this day. This festival is celebrated in every village and town. Houses and shops are painted in new colours. People light their homes with candles and electric lights. They buy sweets and toys. They, distribute gifts among friends and relatives. Children enjoy fireworks at night. On this day, people worship goddess Lakshmi. Some people gamble on this day. It is- an evil. It should be ended.                                    2.         ...

                              CHAPTER 4              THE MODEL MILLIONAIRE                                                 (Oscar Wilde)  Question and Answer Q. What qualities made Hughie Erskine popular with men and women  Ans. Hughie was wonderfully good-looking. He was very good at heart. any ill-natured thing. He never said any unkind word even. In fact, he had every Ome never s quali Except that of making money. All this made him very popular among men and women Q. Hughie was unable to settle down in a profession because he was unwilling to work yes no. If no what the reason?  Ans. not that Hughie was unwilling to work. In fact, he tried his hand at many otessrons, bur he was now nere successful. Ans It was but always failed. In fact, he did...

  Multiple choice questions:  Light year is the unit of  A) Intensity of light   B) distance C) velocity D) time The number of significant terms in 3400 is  A) 7  B) 6 C) 4 D) 2 Which of the following quantity is expressed as force per unit area  A) Work B) pressure C) volume D) area Identify the vector quantity among the following  A) Heat B) angular momentum  C) distance D) energy The angle of projection for a projectile thrown parallel to horizontal  A) 30°  B) 0° C) 45° D) 90° Force responsible for the circular motion is  A) Centripetal force  B) centrifugal force  C) gravitational force  D) none of these A particle revolves arounda circular path. The acceleration of the particle is inversely proportional to A) Radius B) velocity C) mass of the particle  D) both b and c  If dot product of two vectors is zero,then the vectors are  A) Parallel to each other  B)  anti parallel to ea...