Pi*6 * * * * * Independent of the radius? Makes no difference if the disc is twice as wide? I think not! It is actually 2*pi*r2 where r is the radius of the disc.
Area of disc: pi*6^2 = 36*pi square cm
The area of a disc of radius R units is pi*r^2 square units.
It is the surface area of the two ends plus the surface area of the curved surface. Surface area of each end is pir2 Surface area of the curved surface is 2pirh Total surface area = 2pir2 + 2pirh
If R and r are the outer and inner radii of the annulus (ring) then the area is pi*(R2 - r2), which is simply the area of the big disc minus that of the little disc.
Pi*6 * * * * * Independent of the radius? Makes no difference if the disc is twice as wide? I think not! It is actually 2*pi*r2 where r is the radius of the disc.
If r is the radius of the disc, then pi*r2 square units.
One way to increase the surface area of a spherical cell is by forming microvilli on its surface. Microvilli are tiny finger-like projections that extend from the cell membrane, increasing the surface area for absorption or secretion. Another way is to flatten the cell to form a disc-like structure, which would also increase the surface area relative to a sphere.
sacromere
Area of disc: pi*6^2 = 36*pi square cm
The area of a disc of radius R units is pi*r^2 square units.
Area is calculated using the value of pi times the square of the radius. Therefore, the area of a standard compact disc is 113.0976 square centimeters.
PITS
If a Mac computer is not accepting a disc, check the disc for surface scratches. Superficial scratches can compromise the disc and result in errors. You will also want to be sure that the disc is compatible with Mac computers.
It is the surface area of the two ends plus the surface area of the curved surface. Surface area of each end is pir2 Surface area of the curved surface is 2pirh Total surface area = 2pir2 + 2pirh
The total surface area! The total surface area! The total surface area! The total surface area!
Red blood cells are disc-shaped to maximize their surface area for oxygen and carbon dioxide exchange. This shape allows them to efficiently transport oxygen throughout the body and fit through tiny capillaries.