How much of an ice berg is visible above the surface of the water after the titanic crashed?
1/10 is visible
The number of visible sides if one if viewed from the front or side. The elevation from an angular position would give two face whereas all four triangular faces will be visible from above. So the answer will depend on the viewing position. In every case, the dimensions of the triangles would be required to find the visible surface area.
You could call the surface the "face" if you don't mind that it does not specifically restrict the meaning to that which is visible. Face is used in the sense of that part of a celestial body that is turned towards you. Surface (literally, upon or above the face) is that which you can see, that which reflects light.
The suns visable surface is called photosphere. There is an area above this photosphere that is named the reversing layer that extends about 300 miles. This reversing layer is responsible for most of the absorption lines that show in the specturm of the sun. The two outermost layers of the sun are the chromosphere and the corona.
Magnetic flux by itself is not visible to the human eye, but they can be seen with a flat, non-magnetic, thin surface. A magnet and some Iron filings. Simply place the magnet under the flat surface (such as a thin sheet of wood) and hold it there. then place the Iron filings above the flat surface and move the magnet a little. you should see the magnetic lines of flux if the magnet is powerful…
Using the simple approximation above calculate the surface area of a sphere with a radius of 7 meters?
A meteorologist is observing clouds to determine the next day's weather forecast These clouds are located in the?
In a hard disk the heads fly above the surface on a thin cushion of air, to prevent wear to the disk or heads. Should something cause the heads to touch the moving disk surface it is called a "head crash" and is not all that different from an airplane crash, as the heads quit flying on their cushion of air.