Recent content by fujifilm6502002

I am familiar with with heat transfer calculations by conduction and convection. I guess my confusion is to the assumption that should be made. In this problem I understand that the amount of energy transfer through the pipe using conduction is related to this equation where q=-K(dT/dx) and...

I was wondering what do you mean break up the pipe into short length and analyze each short length mean? I was wondering what method did you use as in terms of equations and theory involved.

I am not sure how to approach this problem. If you have a carbon steel pipe that is being heated on one end at a constant temperature of 1500C. Can you figure out how much distance in pipe will it require before it cools to 790C? The thermal conductivity of Carbon steel is 54 W/mk. Another...

Thanks a lot

That would be great. Thanks

I guess you can use Bernoulli to calculate the change in pressure helicopter.

I was wondering like if you are building your own helicopter what would someone use to test the amount of thrust produced by the rotor?

I know the lift force equation is .5*rho*V^2*Area*Coefficient. But I was wondering in the real world how would you measure the lift force? I hope they don't just plug the values for the equations.