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Pes eng xi_130_escape velocity

Pes eng xi_130_escape velocity






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    Pes eng xi_130_escape velocity Pes eng xi_130_escape velocity Document Transcript

    • PES/ENG/XI/130 A PUNJAB EDUSAT SOCIETY PRODUCTION Subject English Class XI Module Escape Velocity VO1 A five years old English boy looking at the moon and says, “One day I will see the stars from the moon. Anchor 1: Hello students! You have seen a kid having a dream of going to the moon. Do you ever wished to go to the moon? I hope so many of you wish to go. But you are silent because it is very difficult to reach there. Of course today in the age of twenty-first century, nothing is impossible. So today we will read about Ted, an English young man who not only passed the Examination in academic qualification but he risked his life to fulfill his ambition. Students! Before going further let’s have a look at the learning objectives of the episode. After the completion of the module, you will be able to • Narrate the story of the adventure of Ted. • Describe strangeness of life on the moon. • Answer short questions as asked in the examination. Anchor 2: Now before going ahead with the story, let me tell you about the writer of the lesson. Writer is Brian N Ball. He wrote many stories and novels on Science Fiction. The story of Escape Velocity is not the story of past but it is the story of 2031. He has tried to bring future in the present. 1
    • PES/ENG/XI/130 Now you must be eager to know the story. So look at the screen. VO2 Ted: A young English of 24-25, rich man’s son, very intelligent student of Astronomy. Ed: Ted’s uncle very expert in killing sharks. The scene starts in the sea; Ted and Ed are in a submarine. They are on holiday. Ted has seen his uncle killing dozens of sharks. Today is Ted’s last chance to test himself with a knife before being posted at the observatory on the moon. VO3 Ted shouted: Shark Ed: Stay here! (Ted waited tensely for the shark to decide to charge. She suddenly clipped his huge tail and charged. Ted worked quickly and accurately. He waited and slashed, slowly. It seemed but fast enough. He kept the knife in so that the shark’s impetus did the killing. It fell away slowing dead.) VO4 Ed: I suppose you were ready for it, you did it well Ted: It’s my last chance. I’ll get my movement orders from the Moon Service any day now. Ed: O’ yes but at first they hadn’t been too sure to accept you at Astronomical Institute. Ted: Yes they thought, being a rich man’s son I may not be serious about a life time of studying the stars. Ed: But you have proved them wrong by including your self in the top 2% students. Ted: I hope I’ll get the order today. Ed: It means a lot to you. Doesn’t it, Ted? (As he swung the submarine towards the shore) Ted: Everything. Since I was five years old, I first realized there were people up there. I’ve said to myself that one day I’d be there to see the stars. Ed: And now you’re going, I’ll miss you in the holidays. Anchor 3: 2
    • PES/ENG/XI/130 Students! Now you must have learnt from the animation that Ted is very intelligent student of Astronomy. He was the top student of A.D 2031 in the Astronomical Institute’s examination. He was expecting his movement orders to work in the observatory at the moon. But the letter he received is of regret. It means he could go any where he wished now: Anywhere, except to the Moon. When Ted showed the letter to his uncle Ed, he tried to tell him following special things about the moon. ftfdnkoEhU, s[jk~ animation s'I uzrh soQK ;wM nk frnk j'J/rk fe Ted , Astronomy dk pj[s jh j[fFnko ftfdnkoEh ;h. T[j A.D 2031 ftZu Astronomical Institute’s d/ fJwfsjkB #u ;G s'I gfjb/ Bzpo s/ nkfJnk ;h. T[j uzB s/ gq/yDFkbk ftZu ezw eoB dh T[whd eo fojk ;h. go i' gZso T[; ~ fwfbnk, T[; B/ T[; ~ fBokF eoB fdZsk. fJ; dk wsbp fJj ;h fe T[j uzB s'I nbktk fes/ th ik ;edk ;h, fiE/ T[j ukj/. id' Ted B/ fJj gZso nkgD/ nzeb Ed ~ ftykfJnk sK T[BQK B/ T[; ~ uzB pko/ e[ZM ftF/F rZbK dZ;D dh e'fFF ehsh. Every one can not withstand the life on the moon. Gravity of the moon is one sixth of Earth’s gravity. It makes moving about altogether different. Very few and strange individuals, No natural light. You have to live in caves under perpetual artificial light. Meteors are falling at any time and may shatter the roof of the dome. Anchor 4: So you have seen that everyone can not withstand the life on the Moon. It is a strange life. The gravity of the moon is one-sixth of Earth’s gravity. Therefore, moving about is altogether different. There are only a few 3
    • PES/ENG/XI/130 hundred individuals there, and most of them you’ve never seen because they are from another part of the planet. One has to live in caves under perpetual artificial light. While on the moon you have to be aware that at any moment the gongs of an alarm might warn you that you had seconds to reach for an emergency suit with its air supply, because a meter had shattered the roof of the dome. Eighty percent of all trainees were sent back within weeks of landing. Children! The strangeness of life on the Moon was too much for them. Ted was very depressed. Uncle Ed sympathized with him. But he says that, he could stand living the rest of his life down on earth if they’d only give him the chance of a few days on the Moon. Now he has still some hope so Ted goes to Dr. Hargreaves. Here is the conversation between the two. ;' s[;h t/fynk fe jo e'Jh uzB s/ ihtB BjhI ih ;edk. T[E/ dhnK gfo;fEnK nihp jB. uzB dk r[o{sk nkeoFD, Xosh d/ r[o{sk nkeoFD dk S/tK fjZ;k j?. fJ; eoe/ fJj g{oh soQk nbZr j?. T[E/ f;oc e[ZM jh ikshnk jB, s/ T[BQK ftZu' f}nkdkso ~ s[;hI ed/ BjhI t/fynk, feT[I fe T[j d{i/ rqfj d/ jB. uzB s/ feqsw gqekF d/ tkbh r[ck ftZu ofjDk g?Idk j?. go uzB d/ T[go s[jk~ u"ezB/ ofjDk j'J/rk feT[Ieh, yso/ dh xzNh fe;/ th ;w/I ;[DkJh d/ ;edh j? ns/ s[jk~ e[ZM jh seconds, emergency suit ftZu gj[zuk gt/rk, fiE/ air supply w"}{d j[zdh j? feT[Ieh fe;/ yr'bh t;s{ d/ NeokT[D eoe/ r[zpd dh SZs N[ZN rJh j?. ;ko/ f;ybkJh gqkgs eoB tkfbnK u'I nZ;h ch ;dh ~, tkg; nkT[D d/ e[ZM jcfsnk gfjbK jh }whB s/ G/i fdZsk frnk ;h. ftfdnkoEhU, T[BQk bJh uzB T[go ihtB pj[s f}nkdk ftbyD ;h.Ted pj[s jh T[dk; ;h. nzeb Ed B/ T[; Bkb jwdodh iskJh. go T[; B/ fejk, fe T[j nkgD/ ihtB dk pkeh dk ;wK Xosh s/ fpskn ;edk j?, i/ e[ZM T[; ~ fdBK bJh uzB s/ ofjD dk w"ek fdZsk ikt/ sK. j[D T[; ~ jkbk th e[ZM T[whd ;h, fJ; bJh 4
    • PES/ENG/XI/130 Ted, Dr. Hargreaves e'b iKdk j?. fJE/ d'jK dofwnkB rZbpks j[zdh j?. VO5 Dr. Hargreaves. They’ve turned you down on medical grounds. Ted: Me! Doctors Hargreaves: Heart. Under normal conditions, the Moon shuttle will kill you. You could not stand the acceleration due to escape velocity. Ted: Heart trouble! (it was a shock to him) Doctors Hargreaves: It takes a powerful physique to withstand normal acceleration, as you know. In your case, the chances are about fifty-fifty that you’d die. It’s too much of risk. Ted: You couldn’t replace the defective part, even the whole heart replacements is very common. Dr. Hargreaves: (shaking his head) It’s the mitral valve. We could replace it, certainly, but the Moon service would never look at you. Not with a replacement. Ted: Thanks for seeing me, it’s good of you. Anchor 5: Students! I hope you have understood the reason behind the rejection of Ted. Dr. Hargreaves has mentioned that Ted’s heart is weak so he can not withstand the acceleration due to escape velocity. The word Escape Velocity must be confusing you. So let’s first talk about the Escape Velocity. ftfdnkoEU, w?~ T[whd j? fe s[jk~ T[; ekoD dk gsk bZr frnk j? fe Ted ~ itkp feT[I fwfbnk. Dr. Hargreaves B/ T[b/y ehsk fe Ted dk fdb ew}'o j?, fJ; bJh T[j n?;e/g rsh d/ ekoD, rsh ftZu tkX/ ~ podkFs BjhI eo ;e/rk. fJj Fpd n?;e/g s[jk~ }o{o jh p/u?B eo 5
    • PES/ENG/XI/130 fojk j't/rk . ;' ;G s' gfjbK w? s[jk~ n?;e/g rsh d/ pko/ ftZu dZ; fdnK. Escape Velocity consists of two words: Escape: beyond, out of, to get away from Velocity: speed in a particular direction Therefore it is a speed of any body in the direction away from the center of earth with which the body goes beyond the force of gravity. Or you can define escape velocity as: It is a speed with which if a body is thrown upwards from the earth then the body goes out of the reach of gravity. You can understand it well with the help of this demonstration. VO6 fJ; bJh fJj fe;/ th t;s{ dh T[j ;ghv j? fi; Bkb T[j Xosh d/ e/Ido s' d{o dh fdFk ftZu iKdh j? ns/ fi; eoe/ t;s{ r[o{sk nkeoFD s'I go/Q ubh iKdh j?. iK s[;h n?;e/g rsh ~ fJ; soQk th gfoGkFs eo ;ed/ j', fe fJj T[j ;ghv j[zdh j?, id' fe;/ t;s{ ~ T[go tZb ;[fNnk iKdk j? sK T[j r[o{sk nkeoFD dh fyZu s'I d{o ubh iKdh j?. Anchor 6: Now students, you must have understood the reason behind Ted’s not getting employment at the moon. But you know he is crazy for going at moon. So he is very restless. His father is worried for his health so he advised him; VO 7 6
    • PES/ENG/XI/130 Ted’s father: Take a month off, son. Take a year. Go and see the world! I’ll see you don’t run short of cash. Then come back and tell me what you’ve decided. Ted: Couldn’t you pull something with the Moon Service? You know all the big men. General Detweiler and Secretary Harrison were here last week. Couldn’t they do anything”? Ted’s father: No Ted. This is the twenty-first century, and we have to do the job we’re trained and suited for. The moon service people knows what they are talking about, and if they say “no”, then “no it is”. Anchor 7: So students, Ted comes back to the Astronomical Institute. He is wandering in the corridors, glancing at the photographs of early astronauts. His eyes stop at a British, crazy, middle-aged rocket specialist who made his own weird ship and blasted off from his own back garden. Children! What a coincident, Ted thinks of the Shark. What was there in common? Between his first real shark-hunt and the Englishman’s crazy shot in a home made rocket? Ted grinned. Action was link between Willis and his first shark. Students you will be surprised to know that after one hour, Ted was moving about the Dump. Now you will ask what that is. It is a strange collection of machinery from the first eight years of rocketry. It was the dump for scores of rocket bodies, hundreds of engines, and millions of obsolete spares. Ted takes the view of everything and at last he thinks anything useful? Why not the spare space-suit been taken from the rack? Now an idea boiling up in his mind as he looks at the crest of the Moon Services on the suit. ;' ftfdnkoEhU, Ted tkg; Astronomical Institute ftZu nk frnk. T[j poKv/ ftZu x[zw fojk ;h ns/ gfjb/ astronauts dhnk s;thoK t/y fojk ;h, sK T[; dhnK nZyK nZXyV T[wo d/ fJZe ypsh poskBth s/ fNe rJhnk i' fe okeN dk wkfjo ;h. fi; B/ nkgDk jh nihp ijk} pDkfJnk ns/ nkgD/ jh xo d/ fgSb/ fjZ;/ s' T[vkfJnk. ftfdnkoEhU, eh coincident ;h fe Ted B/ Shark pko/ ;'funk. Ted d/ nkgD/ gfjb/ 7
    • PES/ENG/XI/130 shark-hunt ftZu ns/ nzro/} ftnesh d/ xo ftZu fsnko ehs/ crazy shot dofwnkB, nkg; ftZu eh ;KMk ;h. Ted ][F j'fJnk. T[; d/ nkgD/ gfjb/ Fkoe ns/ Willis d/ action nkg; ftZu linked ;h. ftfdnkoEhU, s[;hI fJj ikD e/ j?okB j't'r/ fe fJZe xzN/ pknd Ted S'NhnK w'NhnK uh}K tZb ik fojk ;h. j[D s[;hI g[S'r/ fe fJj eh ;B< fJj okeN fsnko eoB d/ gfjb/ nZm ;kbK dh wFhBoh dk Gzvko ;h. Ted B/ jo fJZe uh} ~ fXnkB Bkb t/fynk ns/ nyho ftZu T[; B/ tos'I ftZu fbnkdh ikD tkbh fe;/ uh} pko/ ;'funk. feT[I Bk fJ; epkV ftZu' tkX{ space-suit b? fbnk ikJ/. fiT[I jh T[; B/ ;{N ~ t/fynk sK uzB ~ b? e/ soQK soQK d/ ftuko T[; d/ fdwkr ftZu T[pkb/ ykD bZr/. Ted Says in his mind, He would go to the moon! In spite of Dad’s well- meant but useless advice, in spite of Hargreaves’ cold discouragement and in spite of a faulty mitral valve. VO 8 The shuttle was scheduled for departure from the Atlantic Platform at 12.33 hours. Before that, he had to make sure that suit was safe. He had checked it down to the last detail. He watched the pleasant-looking security men who stood about idly at the entrance. They looked grand in their tight-fitting Moon service uniforms. But Ted knew they could move. It was not easy to escape their notice. He looked straight into eyes of the first security man. The other looked him over professionally. A late comer, his bored eyes said. The look told Ted that the crest had worked as a recognition symbol. He was in. No one could question him now. He code up the lift to crew’s hatch and walked in confidently. He saluted a senior officer as he passed. He looked around. Where could he hide? 8
    • PES/ENG/XI/130 But his weight! How could he dispose of a hundred and thirty pounds! And the weight of his suit! Seven minutes to blast-off! Ted looked into tiny escape capsule. Everything was in place; waiting for emergency-then he saw it. Oxygen, oxygen tanks. With their highly compressed liquid oxygen! All he had to do was to release sufficient oxygen to equal his weight. The oxygen was so cold that it would evaporate immediately on contact with the far warmer atmosphere of the ship and its volume would escape through the still- open ports within a minute or two. The clamour of the five-minute alarm started him as he carefully checked the outflow of oxygen. Hastily he cut it off as the gauges showed that the necessary weight had escaped. He waited, for death? It was the longest three minutes of his life. He waited for pain and death. Blast-off came with a tiny, almost unfelt, shudder. He closed his eyes, tried to relax, and tried to nerve himself against the first choking thrust of gravity. It comes, not as pain, but as a hammer-blow of force on his chest and throat. This is death. His mind shrieked but it was only the beginning. The Shuttle’s immense engine raced and strained as the vessel roared through thin air away from the heavy drag of Earth’s metallic core. It blasted on, thrusting hard into fifteen-twenty-five-thirty thousand miles an hour. Ted tried to be brave. But a sense of utter cold had caught him with first hard burst of acceleration, and will, strength, and spirit failed. Blackness reached for him. A red cloud burst inside his head. He did not hear the warming clamour of the alarm that told the engineers that an unidentified passenger had plugged into the Shuttle’s air-supply. He did not know that a team of crewmen raced to his assistance when they found his ice-cold body. He knew he was alive because he could see the rabbi-faced nurse. 9
    • PES/ENG/XI/130 Anchor 8: Students! Ted was overjoyed to hear that he has reached the moon safely and will get a chance to work at the moon. So children! Ted has fulfilled ambition of looking stars from the moon. So let me test you, what have you learnt so far? Here are some questions, try to answer them. ftfdnkoEhU, Ted fJj ;[D e/ pj[s jh ][F ;h fe T[j ;[oZfyns uzB s/ gj[zu frnk j? ns/ T[; ~ uzB s/ ezw eoB dk w"ek fwb/rk. fJ; bJh ftfdnkoEhU, Ted B/ uzB s' skfonK ~ t/yD dk nkgDk ;[cDk g{ok eo fbnk. j[D w? fJj t/y btK fe nZi d/ gkm ftZu' s[;hI eh f;Zfynk j?. fJE/ e[ZM ;tkb jB, T[BQk d/ T[so d/D dh e'fFF eo'. Q. 1. Why was Ted keen to get his posting to the Moon? Ans. He was very keen to go to the moon because he was crazy to see the Stars from there and the people there since his childhood. Q. 2. (a) Why was it difficult for every one to endure life on the Moon? Ans. It is very difficult to endure life on the moon because the basic environmental conditions on the moon are not as on the earth. (b) Describe the strangeness of life on the Moon Ans. The life on the moon is very strange as: (i) The gravity on the moon is one sixth of the earth’s gravity (ii) Because of this, movement on the moon is very difficult (iii) No natural light (iv) Meteors are falling at any time Q. 3. Ted felt fit yet the doctor did not recommend his posting to the moon. What was wrong with his heart? Ans. Ted’s recommendation was rejected on the basis of medical Ground, as the mitral valve of his heart was defective. 10
    • PES/ENG/XI/130 Q. 4. Ted visited the Dump. What did he take from there? Ans. Ted took a space suit with a crest of moon on it from the dump. Q. 5. (a) Why did the Security men not stop Ted? Ans. Ted was wearing a space suit with a crest of moon on it. So the Security men did not stop him. (b) How did he dispose of his weight (130 pounds)? Ans. He disposed off his weight by releasing oxygen equal to his weight from the oxygen tanks. Q. 6. (a) Ted lost consciousness when the Shuttle took off. Where did he find himself when he regained consciousness? Ans. When he opened his eyes he saw rabbi-faced nurses who told him that he is on the moon. (b) Why did Ted feel “himself choking with elation and triumph? Ans. Doctors on the moon told him that he was alright and would get chance to work on the moon. So Ted felt himself choking with elation and triumph. Q. 7. How did he manage to survive the strain of the journey? Ans. Ted, while releasing oxygen to dispose off his weight had not replaced the oxygen tank’s control properly. The first jolt of acceleration caused the blanket of cold liquid oxygen flooded over him instantly his body temperature got down and the rate of his heart beat had slowed down to a twentieth of the normal. Therefore strain on his heart due to escape velocity was only a small friction of its usual strain. So before he froze to death, the crewmen saved him. 11
    • PES/ENG/XI/130 Anchor 9: Students, I hope you liked the episode. Thanks for paying attention. 14 12
    • PES/ENG/XI/130 15 13
    • PES/ENG/XI/130 MASTER FILE OF SCRIPT Subject: Class: Topic: Script ID Date of Receiving by PES: ________________________________________________ Date of Receiving by Subject Specialist: Name of Subject Specialist: Tick (√ ) any one of the following: 1. Script is frozen for production. 2. ( ) Script is frozen for production after minor changes done at Edusat HUB. 14
    • PES/ENG/XI/130 3. Script need to freeze for production after suggested corrections to be done by Service Provider. 4. Script returned back for needy correction. Signature of the Subject Specialist Date and Time: Countersigned by: Dy. Director SISE Submitted to Service Providers Date ____________ 15