If the load is uniformly distributed over the area it needs to be 0.21 inch thick using a safety factor of 5 on the glass strength to account for flaws. The support at the corners must not be a point load but rather distributed by a soft or plastic pad
thick commercial glass panels formed under pressure. when cooled the temsion of the pressure is locked into the crystal structure making them very resistant to damage from a blow to their faces (but not to their edges and edge corners)
thick commercial glass panels formed under pressure. when cooled the temsion of the pressure is locked into the crystal structure making them very resistant to damage from a blow to their faces (but not to their edges and edge corners)
thick commercial glass panels formed under pressure. when cooled the temsion of the pressure is locked into the crystal structure making them very resistant to damage from a blow to their faces (but not to their edges and edge corners)
You need to know the area of the glass, its span, how it is supported, and how thick it is; also you need to know the stiffness of the tennis ball; so this is a complex problem.
concave lense is a piece of smooth glass that is thick from the edges and thin from centre and is used to diverge light rays.
It is 10 mm thick.
there is no difference between a thick glass bong and a thin glass bong except i guess the thing breakes easier
The amount of force an ordinary glass can withstand depends on it's thickness. A 1/4-inch thick piece can withstand approximately 292 lb per square foot.
It varies from 2-75 inches thick.
The edges of the thick glass will cool faster than the center portion since the glass has low thermal conductivity. This produces a thermal gradient in the glass putting the outside edges in a state of tension stress. Glass fails in tension at a low value if any flaw exists on the edge surface.
Alternating layers of glass and plastic resin. Truly bulletproof glass must be at least 4 to 6 inches thick! I've seen samples of such glass from WW2 bombers in museums. Modern bulletproof "glass" probably uses plexiglass plastic instead of real glass though. Note: a thick enough piece of ordinary glass is bulletproof by itself. Telescope mirrors (several feet thick) have been shot and although damaged the bullet did not pass through and after removing the bullet, drilling out the hole, and painting the inside of the hole black the telescope was returned to operation with no detectable loss of function.
It is a thick liquid.