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Turbulent Flow
What is turbulent flow through in pipe?
arun govind neelan
- Dec 23rd, 2009
Turbulent flow is a type of flow which is not uniform. There are some losses in this flow when renolds number > 4000 then the flow is turbolent. It increases boundary layer thickness.
ramthoke
- Nov 28th, 2009
When water particle flow in zig-zag manner then it is called turbulent flow.
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Pressure v/s Stress
Though units for pressure and stress are same (i.e N/mm2)What is the difference between stress and pressure?
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abhishank- Member Since Jun-2009 | Jun 28th, 2009
Stress is restoring force developed in the body due to any tensile, compressive or any other force per unit area and on the other hand pressure is force applied on a body per unit area.
vinay kalgotra
- Aug 22nd, 2017
Brother as you said, but in some cases like in wall, eg. we are pressure applied on the wall it is also a scalar quantity.....so, how would we say pressure is only applied in case of fluid..
KAMAL SHARMA
- Jul 20th, 2017
1. Pressure applied on fluid (Gas & Liquid) where as stress applied on solid.
2. Pressure act perpendicular only where stress act perpendicular as well as inclined also.
3. Pressure is only +ve magnitude but stress have both +ve and -ve.
4. Pressure is external force and stress is internal force -
Calorific Value
What is Petrol Calorific Value?
arun govind neelan
- Dec 24th, 2009
It is defined as amount of heat energy produced when unit mass of fuel is burned1cal=4.184 joule
S.KALAIYARASAN
- Apr 21st, 2009
The calorific value of the petrol is 48,000kJ/kg.The highest calorific value fuel is hydrogen is 141,790 kJ/kg.
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Weight and Mass
Differentiate Weight and Mass
arun govind neelan
- Dec 24th, 2009
Mass is used to measure the quantity. Unit is kgWeight is a force = mass * 9.81
ronit_hansum
- Feb 16th, 2009
Mass is a fixed quantity. It remains the same anywhere on earth or moon. But weight is the force with which earth attracts everybody. Weight depends on the position of body on the surface or earth. ...
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Which one is more efficient? A four stroke engine or a two stroke and why?
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Answered by: padmaja
- Oct 5th, 2006
although four stroke engine is more frequently used 2STROKE engine is more effiecient because for every 2 strokes there is a power stroke.for same power generation 2STROKE ENGINE is compact
hrs7400
- Dec 19th, 2011
2 stock engine is more efficient than 4 strock, because Power generation for 2 strock required one strock of compression and one strock of discahrge, while for the same power a 4 strock engine require...
Pradeep sharma
- Nov 25th, 2011
4 stroke is more efficient due 2 its better milage, less wear & tear of parts, contain valves prevent frm leakage, deliver one power stroke in 4 cyle.
But in case of power, 2 stroke is better. it delivered 1 .8 times more power than 4 stroke.
Bt overall view favoured to 4 stroke engine.
