#71
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This is most confused question and discuss many peoples here is right answer with reference
1. Water is heated in a kettle. The inside water is heated by convection. A person sitting near the fire receives heat by: a) Conduction b) Convection c) Radiation d) Reflection e) None of these Reference is Fundamental of Physics by Halliday Resnick Walker Page no 627 8th edition |
#72
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No
It would nt happen, u r simply ruling out law of thermodynamics,it is impossible.
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#73
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@Chemistsafi
see reference it is from thermodynamics chapter.
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"Dreams" are not those which are seen during sleep. Dreams are those which 'll never let you sleep. |
#74
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thank you for solving the paper
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#75
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ds z all very confusing everyone z givin their own answers plz post original answers
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#76
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are these answers are correct
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#77
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solar energy is a form of energy. the answer is no
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#78
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solve mcqs EDS 2010
let the forum members help out sorting correct answers.do any body know
1.Water is heated in a kettle.The inside water is heated byconvection. A person sittingnear the fire receives heat by : a) Conduction b) Convection c) Radiation d) Reflection e) None of these 2. A time can come when we will be able to design a machine which can go on working for ever without theexpenditure of energy. Is itpossible ? a) No b) Yes c) In due course time d) Very soon e) None of these 3. The measurement of rainfallis made by an instrument known as : a) Hydrometer b) Barometer c) Hygrometer d) Pedometer e) None of these 4. Light year is a unit of : a) Distance b) Time Period c) Light intensity d) Time e) none of these 5. Three elements needed forthe healthy growth of plants are : a) N,P,K b) N,C,P c) N,K,C d) N,S,P e) none of these 6.Copper can be converted into gold by : a) Heating b) Artificial Radioactivity c) Electroplating d) Chemical reaction e) None of these 7. In winter an iron pipe feelcolder than a wooden window . This is because wood is : a) Conductor b) non-Conductor c) Semi- Conductor d) Not a solid while iron is a solid e) None of these 8. The echo (reflected sound)will be distinctly heard only atordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least : a) 1120 ft b) 120 ft c) 56fft d) 100 ft e) None of these 9. It is possible to recognize aperson in the dark by simplyhearing his unique voice . It isbecause of the: a) pitch b) Frequency c) Time period d) Quality e) None of these 10. When a ray of sunlight enters a dark room , its straight path become visible because of dust particles hanging in the air. It is becauselight is : a) Visible B) Transparent c) Invisible d) opaque e) None of these 11. Animals obtain carbon dioxide mainly from : a) Starch b) Sucrose c) Glucose d) Glycogen e) None of these . . . , . . . . . . . .. .. . . . . . . . . . . , . . . .
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#79
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1.Radiation(when heat moves through a surface without surface contacting the origin of heat)
2.No 3.i think none of these 4.Distance 5.option b or c 6.artificial radioactivity 7.non-conductor 8. 9.pitch 10. 11.glucose
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#80
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Quote:
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