Hydrogen and helium are the most commonly used lift gases. Although helium is twice as heavy as (diatomic) hydrogen, they are both so much lighter than air that this difference is inconsequential. Hydrogen has about 8% more buoyancy than helium . Both provide about 9.8 N of lift (the force to lift 1 kg) per cubic meter of gas at room temperature and sea level pressure. Helium is preferred because it is not combustible.
thank you and i want more objective question and answers in History of india and indian geography which will be very helpful to get success in railway exams. please do the needful for me. regards moin
present iam preparing for railway exams non-technical cadre so please send objective question and answers on indian history and indian geography to get success.
this is wonderful site i have ever experienced and i am learning very well and i am spending lot of time by studying through this site. thank you very much. regards moin
I think Q.9 is incorrect. Rainfall in W.Bengal, Bihar and eastern UP in the non-Monsoon season is due to tropical cyclonic circulations. The Western Disturbances bring rainfall in J&K, Punjab, Delhi and western UP during January-February.
The spleen is known as the GRAVEYARD of RBC. IT is where the RBC are destroyed upon the completion of their 120 days life cycle. Hence, the answer to Q.8 is correct.
It is true that the spleen is reservoir of RBC but it is clear form the question that It selectively destroy the RBC when its life is over. It is told to be reservoir because in case of too bleeding it supplied the necessary blood.
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Admin
April 21, 2009 at 9:03 pmHydrogen and helium are the most commonly used lift gases. Although helium is twice as heavy as (diatomic) hydrogen, they are both so much lighter than air that this difference is inconsequential. Hydrogen has about 8% more buoyancy than helium . Both provide about 9.8 N of lift (the force to lift 1 kg) per cubic meter of gas at room temperature and sea level pressure. Helium is preferred because it is not combustible.
Sandeep Jogula
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அன்பரசு..
May 2, 2009 at 10:18 pma doubt sir…
Question number 3.. based on your explanation, Hydrogen is the lightest gas-right ?
but the answer that gets displayed is different.. do clarify..
moina
June 3, 2009 at 8:04 pmthank you and i want more objective question and answers in History of india and indian geography which will be very helpful to get success in railway exams. please do the needful for me.
regards moin
moina
June 3, 2009 at 8:07 pmpresent iam preparing for railway exams non-technical cadre so please send objective question and answers on indian history and indian geography to get success.
this is wonderful site i have ever experienced and i am learning very well and i am spending lot of time by studying through this site. thank you very much.
regards
moin
moina
June 3, 2009 at 8:10 pmthanq very much for ur valuable information
moina
June 3, 2009 at 8:10 pmthanq very much for ur valuable information
sandeep
June 21, 2011 at 8:56 pmsir plz elaborate the ans of q 3
Arpit Srivastava
November 21, 2011 at 3:14 pmAnswer to Question 8 is wrong.
Spleen is the reservoir (creator) of RBC not the destroyer.
Ashok kumar nayak
January 1, 2014 at 10:29 amMr Arpit, bone marrow is creator of RBC, but spleen is the selective destroyer. I think 8 is right.
PS
November 22, 2011 at 10:03 amI think Q.9 is incorrect. Rainfall in W.Bengal, Bihar and eastern UP in the non-Monsoon season is due to tropical cyclonic circulations. The Western Disturbances bring rainfall in J&K, Punjab, Delhi and western UP during January-February.
PS
November 22, 2011 at 10:05 amReply to Arpit Srivastava regarding Q.8:
The spleen is known as the GRAVEYARD of RBC. IT is where the RBC are destroyed upon the completion of their 120 days life cycle. Hence, the answer to Q.8 is correct.
niraj762
November 22, 2011 at 9:38 pmReply to Arpit and Ps:
It is true that the spleen is reservoir of RBC but it is clear form the question that It selectively destroy the RBC when its life is over. It is told to be reservoir because in case of too bleeding it supplied the necessary blood.
niraj762
November 22, 2011 at 9:39 pmAnswer for question 3 should be increase because fundamentally it will increase 1.5 times.
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