1. Find the diameter of the field of view for your microscope. A microscope with fixed lenses will have a known field of view based on the optics. Check the manual for your microscope
http://www.ehow.com/how_7777179_calculatedrawing...

Sundry debtors+stock in handsundry creditors only ninty days only * 75% = answer. this is the drawing power of a company.
http://wiki.answers.com/Q/How_is_drawing_power_cal...

1 Use the following formulas. I=V/R  This is a formula we learned in high school, that still holds relevance today. Current is equal to voltage divided by resistance. I=P/V  Current
http://www.wikihow.com/CalculateChargingCurrent...

Rather than rely on specs I checked the numbers using a KillaWatt brand power meter. This is charging an iPhone 4s reading 58% full: 0.09 amps. 5 watts. Power factor = 0.56. 10
http://www.quora.com/iPhone/Howmuchcurrentdoes...
