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![[Post New]](/templates/default/images/icon_minipost_new.gif) 16 Mar 2008 19:05:32 IST
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a cylindrical tank has a small hole of 1 cm2 at its bottom. If water is allowed 2 flow into it at 70 cm3/s,then d max height upto which water will rise is? (Pls do tel me d method also)
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16 Mar 2008 19:43:45 IST
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it goes lyk dis speed of water thru d hole when water is at height h is=root 2gh xA at max water level speed of water thru hole =speed of water entering vessel 2cm 3/sec=1cmXroot 2gh calculate n u get 25 cm i suppose
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2.45 cm.
max height will be achieved when rate of inflow = rate of outflow
70 = (sqrt(2gH)*100)*1
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"A perfect mind is a treasure unsurpassed."
"It is said that human beings have 5 senses. That's because most of them lack the 6th - common sense."
-- astatine19 --
http://astatine19.blogspot.com/
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16 Mar 2008 20:38:59 IST
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well dear i su ppose g=9.8 n wats that 100 in ur ans
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17 Mar 2008 12:08:26 IST
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well, the velocity will be in m/s, wont it? U need to multiply by 100 to get it in cm/s
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"A perfect mind is a treasure unsurpassed."
"It is said that human beings have 5 senses. That's because most of them lack the 6th - common sense."
-- astatine19 --
http://astatine19.blogspot.com/
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17 Mar 2008 18:59:15 IST
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well d ans is 2.5cm .........
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17 Mar 2008 19:11:38 IST
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yeah, u will get that if u use my eqn nd g = 9.8
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"A perfect mind is a treasure unsurpassed."
"It is said that human beings have 5 senses. That's because most of them lack the 6th - common sense."
-- astatine19 --
http://astatine19.blogspot.com/
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17 Mar 2008 19:20:41 IST
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thnx but pls explain dat part,max ht will be attained wen vel of inflow=vel of outflow
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17 Mar 2008 19:28:01 IST
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yeah hes rite when velocity of inflow is equal to velocity of outflow there is no change in height and therefore it corresponds to the max height!!!  |
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17 Mar 2008 19:48:06 IST
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well, for the height to be constant, rate at which water is entering should be equal to the rate at which water is leaving. If more water is entering, height of water will increase. If more water is leaving, height of water will decrease.
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"A perfect mind is a treasure unsurpassed."
"It is said that human beings have 5 senses. That's because most of them lack the 6th - common sense."
-- astatine19 --
http://astatine19.blogspot.com/
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18 Mar 2008 15:06:08 IST
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the ans is 2.45m. The ans is as follows h=u^2/2g =70X70/2X10 =245cm =2.45m
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