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  #21  
Old Wednesday, November 10, 2010
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@ 9

answer is we recognize various persons' voices on phone or in dark due to quality.
plz refer musical and noise and sound in physics

@ 50

carbon dioxide is obtained by following reaction
glucose+oxygen-----> energy+water+ carbon dioxide

so CO2 is obtained from the oxidation of glucose
Last edited by Silent.Volcano; Wednesday, November 10, 2010 at 02:28 PM.
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  #22  
Old Wednesday, November 10, 2010
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Q 11 is right .. The minimum length of the mirror should be half of that of the person
Reference :http://in.answers.yahoo.com/question...0043116AAYR7In

Q 46 is also right. The answer is water
Reference : Wikipedia

Q9: Quality
Reference : my sis and she is quoting her 9th standard Physics’s book by Punjab Board. If anyone could confirm that pls.
Another reference : http://hyperphysics.phy-astr.gsu.edu...timbre.html#c1

P.S : Thanks Zara for the effort and all those who took part in the discussion. Btw, where is the tab for thanking a post? Somehow, I couldn't manage to find it
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  #23  
Old Thursday, November 11, 2010
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@ Q 46

see intermediate book 1 "biology 11 " Punjab textbook board . chapter 5 > "variety of life"

last page of chapter 5 under the heading " hepatitis" 4th line.

the author says , " hepatitis A, formerly known as infectious hepatitis is transmitted by contact with faeces from infected individuals.
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  #24  
Old Thursday, November 11, 2010
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@ Q 46

see intermediate book 1 "biology 11 " Punjab textbook board . chapter 5 > "variety of life"

last page of chapter 5 under the heading " hepatitis" 4th line.

the author says , " hepatitis A, formerly known as infectious hepatitis is transmitted by contact with faeces from infected individuals.
not a pint of doubt about that janab! water is not the answer...
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  #25  
Old Thursday, November 11, 2010
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50. Animals obtain carbon dioxide mainly from :

a) Starch
b) Sucrose
c) Glucose
d) Glycogen
e) None of these

The only suitable choice from a,b,c and d options can be C) Glucose. In few cases, it turned out be e) None of these. The rationale behind e) None of these is that like human beings, animals also obtain co2 from atmosphere (air). Again,this answer is susceptible subjected to criticism by old hands at EDS.
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Last edited by redmax; Thursday, November 11, 2010 at 09:03 AM. Reason: Addition
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  #26  
Old Thursday, November 11, 2010
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Quote:
Originally Posted by bear View Post
@ Q 46

see intermediate book 1 "biology 11 " Punjab textbook board . chapter 5 > "variety of life"

last page of chapter 5 under the heading " hepatitis" 4th line.

the author says , " hepatitis A, formerly known as infectious hepatitis is transmitted by contact with faeces from infected individuals.
You are right. Actually, its usually transferred by Feces-contaminated water. It's one tricky question
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  #27  
Old Thursday, November 11, 2010
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Quote:
Originally Posted by redmax View Post
The only suitable choice from a,b,c and d options can be C) Glucose. In few cases, it turned out be e) None of these. The rationale behind e) None of these is that like human beings, animals also obtain co2 from atmosphere (air). Again,this answer is susceptible subjected to criticism by old hands at EDS.
This is a bad worded question. To clear the concept, animals do not acquire Carbon dioxide from the atmosphere, though it is present in inhaled air. During the process of breathing, the air we inhale contains 0.04% carbon dioxide (on an average) but the concentration of carbon dioxide in our blood (which is brought to lungs for purification) is more than that of 0.04%. due to this difference in concentration, the carbon dioxide moves from blood cell to lungs surface (process of osmosis). this excessive carbon dioxide is then exhaled out when we breath out. so as a human beings we contribute by releasing carbon dioxide into the atmosphere.

it is clear that the answer to this question is glucose.
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  #28  
Old Thursday, November 11, 2010
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This is a bad worded question. To clear the concept, animals do not acquire Carbon dioxide from the atmosphere, though it is present in inhaled air. During the process of breathing, the air we inhale contains 0.04% carbon dioxide (on an average) but the concentration of carbon dioxide in our blood (which is brought to lungs for purification) is more than that of 0.04%. due to this difference in concentration, the carbon dioxide moves from blood cell to lungs surface (process of osmosis). this excessive carbon dioxide is then exhaled out when we breath out. so as a human beings we contribute by releasing carbon dioxide into the atmosphere.

it is clear that the answer to this question is glucose.
to add a few lines to your answer. The carbon dioxide that we inhale does not get chemically altered in our body. i.e. is not used in any process in our body. Oxygen on the other hand, when in-haled, combines with Glucogose, to give out Carbon Dioxide, Water and Energy. Thus we see that Oxygen gets chemically altered.
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  #29  
Old Thursday, November 11, 2010
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Quote:
Originally Posted by redmax View Post
The only suitable choice from a,b,c and d options can be C) Glucose. In few cases, it turned out be e) None of these. The rationale behind e) None of these is that like human beings, animals also obtain co2 from atmosphere (air). Again,this answer is susceptible subjected to criticism by old hands at EDS.
Allah ka khof karo jee

c6h12o6+o2---------->E+co2+H2o
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Allah ka khof karo jee

c6h12o6+o2---------->E+co2+H2o
kher hay bhutto sahab...!! Karnay do redmax ko aisi batain.... allah tou daikh raha hay na heheheh

mazak hay redmax mind nai kerna
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