For photosynthesis, plants need water, carbon dioxide, and sunlight (or photons). The water provides electrons, the sunlight provides the energy, and CO2 provides a carbon sou â¦ rce.
Trick question! A single sheet of OSB weighs about 1.5 lbs per sf or 47 lbs, assuing you are asking about 7/16 thick, not 716.One sheet of plywood weighs a bit more.he weight of treated plywood will depend on the size of the  plywood. A 4 x 8 1/2 inch piece of treated plywood will weigh an  estimated 50 pounds.
This is heavier at 20 pounds but adds the convenience of compact storage. Another very similar rollator is the 4-wheel Folding Rolling Walker. It weighs 11 pounds and has an adjustable seat, curved padded backrest, tool free assembly, adjustable seat, lightweight aluminum construction, and 250 pound weight capacity. It also has a shopping basket, dual hand brakes, and fold-up design.