Final answer:
The nominal size of 1 1/2 x 3 1/2 lumber refers to the pre-finished dimensions in inches, while the actual size may be less. Lumber used as studs is commonly placed 16.0 inches apart, equivalent to 40.64 centimeters.
Step-by-step explanation:
The nominal size of lumber refers to the dimensions given to a piece of wood before drying and planning. This can make the actual size slightly different from the nominal size. For 1 1/2 x 3 1/2 lumber, this is typically understood to mean the nominal size in inches, where the actual dimensions might be slightly less due to the finishing process.
When it comes to construction and using lumber as vertical studs, they are often placed a specific distance apart for structural integrity. The standard distance between studs is 16.0 inches apart. To convert this measurement into centimeters, you would use the conversion factor where 1 inch is equivalent to 2.54 centimeters. Therefore, to find the distance in centimeters between studs, you would calculate 16.0 inches times 2.54 centimeters/inch which equals 40.64 centimeters.