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/diy/ - Do It Yourself

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>> No.600513 [View]
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600513

>>600502
>but how would i convert that into an efficiency (%)
This would be very difficult to do.

In physics terms efficiency=Work done/Energy in.
Work = Force * Distance
Work = Current * Voltage * Time
Work = Mass * Gravity * Height
And a whole bunch more that dont really apply.

This is further complicated by friction, You usually dont consider energy lost to friction as work done. When the car is travelling at full speed, all the energy going to the motor is being used to overcome friction [electrical, mechanical, drag]. Therefore, in physics terms no work is being done.

You can 'cheat' and claim those losses as work done, but you're still going to have a hard time figuring out the Force to use in:
W=F*D
It's going to drop as the fuel gets used up. You could take several measurements at different levels of 'charge' and average them. Then do a couple runs and find the average distance traveled over a complete discharge.

>> No.144301 [View]
File: 926 KB, 252x202, 1282525151075.gif [View same] [iqdb] [saucenao] [google]
144301

Hey /diy/nasty warriors,

My car window is pretty dirty, does anyone know of any easy to make homemade recipes that can be used to clean glass?

Also, homemade recipe thread!! You never know when this shit may come in handy.

Pic not related, but it makes me lol

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