Acid rain is capable of damaging the buildings and historic monuments which are made up of rocks such as limestone and marble. This is because these rocks contain a large amount of Calcium Carbonate, which reacts with the Sulfuric Acid to create Gypsum. Gypsum flakes off easily. This is shown in the following reaction:
CaCO3 (s) + H2SO4 (aq) →CaSO4 (aq) + CO2 (g) + H2O (l)
Q. 4:
The initial velocity is u=0, acceleration a= 9.8 m²/s, time t=5 s
Last velocity= Initial Velocity + (Acceleration x time)
v = u+ at
v=0 + 9.8×5
= 49 m/s
Q. 6:
When dealing with audible frequencies, the human ear cannot distinguish an echo from the original sound if the delay is less than 1/10 of a second. Thus, since the velocity of sound is approximately 343 m/s at a normal room temperature of about 20°C, the reflecting object must be more than 17.15 m from the sound source at this temperature for an echo to be heard by a person at the source.
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madhan
May 12, 2011 at 5:22 pmcan u plz explain q 12 sir?
admin
May 13, 2011 at 3:19 amAcid rain is capable of damaging the buildings and historic monuments which are made up of rocks such as limestone and marble. This is because these rocks contain a large amount of Calcium Carbonate, which reacts with the Sulfuric Acid to create Gypsum. Gypsum flakes off easily. This is shown in the following reaction:
CaCO3 (s) + H2SO4 (aq) →CaSO4 (aq) + CO2 (g) + H2O (l)
bharat
May 13, 2011 at 3:24 pmsir in q 9 why the ship went to tuticorien while there is no passing of ships from bay of mannar…???
madhan
May 13, 2011 at 3:32 pmThank U sir..Please add more science related questions sir
badal
May 14, 2011 at 10:47 amsir can you please explain the calculation s for q4 and q6
admin
May 14, 2011 at 11:00 amQ. 4:
The initial velocity is u=0, acceleration a= 9.8 m²/s, time t=5 s
Last velocity= Initial Velocity + (Acceleration x time)
v = u+ at
v=0 + 9.8×5
= 49 m/s
Q. 6:
When dealing with audible frequencies, the human ear cannot distinguish an echo from the original sound if the delay is less than 1/10 of a second. Thus, since the velocity of sound is approximately 343 m/s at a normal room temperature of about 20°C, the reflecting object must be more than 17.15 m from the sound source at this temperature for an echo to be heard by a person at the source.
Ajaysinh
June 5, 2011 at 8:47 amwhr is ennor situated?
shivam pandey
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him99
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sourabh
June 26, 2013 at 12:08 amsir can you give us a summary of nagaya protocol?
sourabh
June 26, 2013 at 12:23 amsir can you give us some notes of nagaya protocol?