Questions asked by James

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• Find the area of the region enclosed by y=ln(x) ,the x-axis,the y-axis and y=1 ? (a) dx select (b) dy select
  
• What fraction of the volume of an ice berg is visible above ocean water ? (density of ice =917) (density of water =1025)
  
• How long it will take for 500ml of water to flow through a 15cm long 1.5mm radius if the pressure differential across the pipe is 4kpa?the viscosity of water is 0.8 cpoise. Ans=7.5s
  
• In a blood transfusion,blood flow from a battle at atmospheric pressure into a patient vein in which the pressure is 20mmHg higher than atmospheric.The bottle is 95cm higher than the vein and the needle into the vein has length of 3cm and diameter 0.45mm?
  
• A tank containing oil of (sp gr=0.8) rests on a scale and weighs 78.6 N .By mean of a wire,a 6.0 cm cube of aluminum, (sp gr=2.7) is submerged in the oil? . Find a) the tension in the wire b)the scale reading none of the oil overflows Ans; (a) 4N (b)80N
  
• A cube of wood floating in water supports a 200-g mass resting on the center of its top face.when the mass removed the cube rises 2-cm.determine the volume of the cube? Ans: 1000 cm^3
  
• When we use this laws?
  
• Fuel oil density #820" kg/m"^3# flows through a venturi meter having a throat diameter of 4.0 cm and an entrance diameter of 8.0 cm. The pressure drop between the entrance and the throat is 16 cm of Mercury. The density of mercury is #13600" kg/m"^3#?
  
• Find the maximum amount of water that can flow through 3 cm i.d.pie per minutes without turbulence .Take the maximum Reynolds nomber for nonturbulent flow to be 2000?.for water at 20 c, viscosity=1*10^-3 pa.s Ans;0.0028 m^3
  
• How to convert from N.s/m^2 to N.s/cm^2 ????
  
• Nice question in calculas?
  
• Integrate #x^3*√(16-x^2)# by using Trigonometric Substitutions (only)???
  
• Can any anyone explain how #x^2+4x+2# become #(x-sqrt2+2)(x+sqrt2+2)# #x^2+4x+2=(x-sqrt2+2)(x+sqrt2+2)# helppppp??
  
• Integrate #intsec^3(x)# by using integral by parts??
  
• How do you find the exact arc length of a parametric equation ? #x(t)=2 + 9t^2# #y(t)=9 + 6t^3#
  
• Find the arc length for the following question?
  
• Find the value of integral in the branch b?
  
• Bacteria with a population of 3,doubles every seconds , how many Bacteria will be exist after minutes?
  
• How to convert from #(dyn)/(cm)^2# to #N/(m)^2# ?
  
• Can anyone give me an idea about scratchpads and how I can use them?
  
• Can any one help me with these question?
  
• What is the best way to learn English (speaking , listening , writing ) and how i can expressing very well ? give me a reference and methods Thanks in advance.