It is from a vibration test on the aft part of a ship!
BPF=Blade Passing Frequ..
The ship vibrates every time a propeller plade passes and i'm trying to finde the energ which is lost. The mass is imposible to know due to the structure of the ship, but i have a estimate saying...
Hi people can anyone help me? I need to know how much energy it takes to vibrate a mass at a frequency and speed.
How much energy is there in a mass of ex. 100Kg at 10Hz and a speed of 10mm/s ???
I don’t think Gauses law can be used here, I never liked him so normally I don’t use him ;). I am sorry but I don’t think I can help you. If what I said earlier is true (the earth being a big cable with an A=inf.) ohms law suggests that there wouldn't be no loss! Are you sure that...
Normally you wouldn’t consider calculating earth. Earth is a quit good conductor and is considered as a close to ideal resistance. When doing calculations on safety systems, such as HFI and PHFI you only use the transition resistance, which is locally defined by the soil, moist, type of cable...
Okay, that would explain electromagnetism!
So a static field consists of "non moving" electrons! And a magnet consists of molecules with moving electrons, is that right/the answer to why they wont interact?
I would think you would have to know the exact airflow and turbulance around the break, the air temp. and the air hum. You would need a big computer progran such as SolidWorks to simulate it! With a price tag of around 10.000dollers fore a single user program, it might be a little much! I think...
E(kin) = ½*m*v*v
You need to know which material you are using. For the given material you can find how much energy you need to heat one kilogram one degree celcius (or which ever scale you crazy americans use) ;-)
What is the difference between static attraction or repelling, compared to magnetic.
I understand the princips of static build up and why a charged positive and charged negative attract each other. I also understand how the atoms are arranged in a "metal-magnet".
But why cant you attract a...