The distance the number is from zero. For example, + 19 is 19 units of length on the positive side of the number line , to the right of the zero position.- 19 is 19 units of length going the other...
PV = nRT n/V = P/RT n = no of moles V = volume p = pressure R = ideal gas constant = 8.314 J K-1 mol-1 T = Temperature (in K) No of molecules = no of moles x NA NA = Avogadro number = 6.023 x 1023...
The word area is used to define this. CAlculating area is different in every object. Basically area is just the length of the object by the width of the object.