Take our 100 x 100 pixel image again. Suppose it's set at 100 PPI (producing the same 1 x 1 printed image). With re-sampling off, when you adjust the PPI the dimensions adjust as well, this is how things worked in the example above. With re-sampling on, the dimensions won't change.
To dispose of charcoal and wood ash: Let the ash cool for 48 hours. You can speed up this process by pouring water over the hot charcoal and stirring it very carefully. When the ash has cooled completely, wrap it in aluminum foil and place it in an noncombustible outdoor trash bin.
This will remove smell of burnt food and many other odors from your kitchen (and burned-on food from your stainless steel pots.). Soak a piece of bread in vinegar and set it overnight in a lunchbox or wastebasket to remove built-up food odors. Grind leftover citrus rinds in your garbage disposal to sweeten it. Or dump half a cup of salt down the drain and turn on the disposal. This loosens caked-on food and helps neutralize odor.