Eye Strain. When you stare at screens all day, your eyes can get tired. Take a break with the 20/20/20 rule. Look at an object at least 20 feet away for 20 seconds every 20 minutes, says Ivan Schwab, MD, a spokesman for the American Academy of Ophthalmology.
Once you have the dial on your volt meter set to measure voltage, simply touch the black lead to the negative (-) terminal on your battery and the red lead to the positive ( ) terminal on your battery.
How to convert volts to joules. How to convert electrical voltage in volts (V) to energy in joules (J). You can calculate joules from volts and coulombs, but you can't convert volts to joules since volt and joule units represent different quantities. Volts to joules calculation formula.