Question
Characterise the following as discrete or continuous giving reasons for your answers.
i) Effects of radiation treatment on a tumour when applied for short period of time but at regular intervals.
ii) Effects of chemotherapy drugs on a tumour when introduced into a patient for a given duration of time.
b) A particle of mass m moves on a straight line towards the centre of attraction, starting from rest at a distance a from the centre. Its velocity at a distance x from the centre varies as . Find the law of force.
c) If a planet was suddenly stopped in its orbit, supposed circular, show that it will fall into the sun in a time which is times the period of the planet’s revolution.
Answer :
Word Count : 432
i) जब विकिरण उपचार थोड़े समय के लिए लेकिन नियमित अंतराल पर दिया जाता है, तब ट्यूमर पर उसका प्रभाव असतत (discrete) माना जाएगा, क्योंकि उपचार निरंतर नहीं बल्कि निश्चित-निश्चित समय बिंदुओं पर दिया जाता है। प्रत्येक सत्र पर प्रभाव अलग-अलग घटित होता है और बीच के समय में कोई प्रत्यक्ष विकिरण प्रभाव नहीं पड़ता, इसलिए प्रभाव समय के साथ निरंतर न होकर चरणबद्ध होता है। ii) कीमोथेरेपी दवाओं का प्रभाव तब __________ ________ __________ ____ _____ ____ ____ ________ ______ ____ ___ ____.
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i) जब विकिरण उपचार थोड़े समय के लिए लेकिन नियमित अंतराल पर दिया जाता है, तब ट्यूमर पर उसका प्रभाव असतत (discrete) माना जाएगा, क्योंकि उपचार निरंतर नहीं बल्कि निश्चित-निश्चित समय बिंदुओं पर दिया जाता है। प्रत्येक सत्र पर प्रभाव अलग-अलग घटित होता है और बीच के समय में कोई प्रत्यक्ष विकिरण प्रभाव नहीं पड़ता, इसलिए प्रभाव समय के साथ निरंतर न होकर चरणबद्ध होता है। ii) कीमोथेरेपी दवाओं का प्रभाव तब __________ ________ __________ ____ _____ ____ ____ ________ ______ ____ ___ ____.
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