Posts by dr funda 



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Really need a New Efunda Calculator 
Dear Tashcraft,Thank you for the suggestion. The calculator you s... 

LaPlace transform of sin(3t)*u(t)? 
Yes, that would be the case. Since the Laplace transform integrat... 

Dr. Funda, purge spam or purge memberships. 
Dear Rolschwarz,
You are right. It is our responsibility to ke... 

why flexural modulus is given as a material data 
Dear Chandrans,
The physical significance of the flexural modu... 

why flexural modulus is given as a material data 
Dear Chandrans,
A similar question was raised a while back and... 

MRP systems 
Dear Rorschach,
Without knowing specifically what your criteri... 

MONEY FACTOR VERSES INTEREST 
Dear Cessna,
The formula you use is exactly what we give, but ... 

Battery Backup 
Hello,
Rorschach's calculation is basically correct, but that ... 

Flexural modulus?? 
Dear janghoon,
Within servicable ranges, plastic material prop... 

I Beam Deflection 
Hi,
I know eFunda does not have everything, but Steel S Sectio... 

Industry news 
Dear tckinch,
Sorry about the overlook. The update engine cras... 

Converting pounds per square foot tp Pascals 
Dear Milt,
How are you doing these days? Here is the stepbys... 

about HermniteGaussian basis function 
What's wrong with what's on eFunda? It may not be the most comple... 

I need help figuring a problem on a balanced system of concurrent... 
Diana,
The picture has been posted to your original message. W... 

I need help figuring a problem on a balanced system of concurrent... 
Dear Diana,
If you could send us the picture to drfunda@efunda... 

Pendulum Deflection 
Dear uofeh,
Oh, you mean the max deflection DURING IMPACT? Sor... 

hi all 
Dear Phil,
I don't know if there's a Chemistry equivalent of e... 

Pendulum Deflection 
Dear uofeh,
Let me make sure that I understand your question c... 

Motorcycle Horsepower 
Dear Lance,
There are a few factors that contribute to the big... 

Uniform Load, Beam Diagram Calculator 
Dear Sir,
Ok, this is much more clear. Since you have 500 lbf ... 

Uniform Load, Beam Diagram Calculator 
Dear Sir,
The p should have a unit of force/length, that is, t... 

Pressure Gradient for Fluid Flow 
Hello mahoward,
Although I'm not sure what you meant by moving... 

Pressure Vs Stress 
Hi sisr,
Pressure and stress are physically similar things, ho... 

Function of inertia block 
Dear mbgm8ccl,
Short answer: No. Without the inertia mass the ... 

This will make you happy, efunda 
Dear Narayan and all,
Thanks for all your support, we could no... 

dry powder inhaler 
Dear mechdon,
When using most commercial inhalers, dry powder ... 

Surface area and volume of intersecting cylinders 
Hello,
This calculation will be very easy if the cylinders mee... 

Ergent need for a fourier transform. 
Dear Mehrnoosh,
The inverse Fourier transform for w/sqrt(1w^2... 

Serious Curve Fitting 
Dear Karan,
Thank you for your data. After plotting the histog... 

Pressure losses 
Hello Spike,
If the pipes are connected in series then the res... 



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