The heart of a man pumps 5 litres of blood through the arteries per minute at a pressure of 150 mm

The heart of a man pumps 5 litres of blood through the arteries per minute at a pressure of 150 mm of mercury. If the density of mercury be 13.6 x 103 kg/m3 and g = 10 m/s2 then the power (in watt) is (NEET 2015)
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/ riteshdahiya

[@aasthasolanki5513]

Y r u in so hurry to finish up the question.....u would hv explained in depth.... anyways

[@pramod_____dhakad]

Kya tumhe 2.5 minutes ke question ko 10 minute me dekhne ka man kar raha hai. Solution are for giving us hint ultimately we have to build our concept.

[@SiddharthShinde073]

Mr. Solanki listen we have not a day for solving each and every question.if we tried to go conceptually it will take so much time.hence short answer or short tricks are always best for time saver

[@aasthasolanki5513]

​@@pramod_____dhakad hints r given in book also, y hv u wasted ur 2.5 mins here...u should hv built ur concepts there

[@aasthasolanki5513]

​@@SiddharthShinde073 thnx for reminding me

[@DARSHAN-sh6ho]

Spammer 🤣 ... bro sir is explaining good 👍

[@hadiaali3509]

In rho gh why you have taken h ki value as pressure ki value

[@PriyankaUppin-kc8pf]

Ha s y sir?

[@khadija.md8842]

Sir given in question is density of mercury, how can density of blood will be same as density of mercury??

[@riteshdahiyasir-kdckotadou5124]

It is NOT Watch video again

[@nisha2458]

Pressure at blood pump is given in the terms of mercury for reference.

[@shubham-hk9fh]

Why height takes •15. It is pressure.

[@riteshdahiyasir-kdckotadou5124]

Shubham what is the doubt? Pressure=density*g*h or you can also use this: 760 mm of Hg is 1 ATM so 150 mm of Hg = (150/760)*1x10^5. result would be same. Let me know if this clears your doubt.

[@kulsum-hamid0818]

Same doubt...

[@shubham-hk9fh]

@@kulsum-hamid0818 As sir suggested me in reply ,u can also solve by that way ,ans will be same .u can check.

[@EverythingZen7]

Why multiply by 10^5?

[@sujalkumarsingh6404]

Bhai pressure of heart is compared with pressure *rise* in Mercury In fluid mechanics we study *rise* in mercury maybe in barometer instrument And the rise of mercury level in barometer gives pressure indication Here rise means "height" till which the mercury level go up If you haven't studied fluids mechanics then you can imagine rise in mercury as seen in thermometer but for imagination purposes only bcz both of them are different So whatever is rise in mercury level is basically taken the height Like 760 mm of mercury means 0.76 m rise which represents 1atm in pressure Like wise just imagine a cylindrical container in which mercury is rising to 150mm that is 0.15 m height Now you have 2 choices CHOICE 1 :-- Convert this mercury pressure to standard pressure that is in terms of pascal or N/m^2 Like this :-- 760mmhg = 1atm 1mmhg = 1/760 150mmhg = 1/760× 150 It comes out 0.197 atm Now convert atm to pascal or N/m^2 bcz this is standard unit So 0.197 × 101325 = 19,961.025 Round off 20×10^3 N/m^2 CHOICE 2 :-- In ques the pressure of heart is compared with mercury pressure So rise in mercury pressure represents height as explained above ( bcz mercury is rising due to pressure upto height of 0.15m in cylindrical glass tube like container and the height till which mercury reaches represents the pressure in terms of mercury barometer This pressure is same as pumped by heart so hence we take this mercury height as height in blood reached due to pressure pumped by heart bcz both pressure are same ) ** So whatever will be rise given in mercury will be the rise in blood pumped by heart pressure ** Then solve as sir did

[@tanmoysenapati]

Sir how can i approach this answer from power = force×velocity

[@abhishekjatain4181]

No bro it is fluid integrated question

[@ashishkumavat4223]

Power = F x V = Pressure x Area x Velocity We know, Area x Velocity = rate of volume flow i.e volume/time Therefore Power = pressure x volume / time

[@RahulKumar-vs5zg]

Tanmoy aakash portis tui

[@shakuntalaalawa8582]

Sir excellent explaibation

[@aartijs8189]

Pressure =125mm de rkha h toh Ham usse H kyo le rhe h

[@GodLxSugarDaddy]

Kyuki mm me h yani mili metre, mercury ek column me kisi particular height me h to wo kitta press exert karegi surrounding me(yani column pe ) jitta jaada height hoga utta jaada press, isliye

[@shauryaupadhyay94]

Thanku Sir ❤️

[@riyajuddinansari6839]

Thanks sir