yes
While concrete has been used as a building material for many centuries, concrete hollow blocks have only been manufactured since the early 1900s. These blocks are used in all types of building projects.
The tooling for gravity casting costs less than pressure die casting but the part cost in pressure die casting is much less. see Sand Casting. Die Casting: In the high pressure, requires a die casting machine to inject molten liquid or semi-liquid metal to a higher rate of die-casting mold cavity filling and solidification under pressure, forming and casting methods obtained. Gravity Casting: Uses the gravity or weight of the metal to fill the cavity producing a metal part. It does not require the use of an expensive die casting machine. The tooling cost is lesser for gravity casting because of the lower pressures needed to produce parts.
Pressure Die Casting
Forging
In sand mold casting the molten metal is poured in to the mold cavity , while in pressure die casting the molten metal is forced under high pressure in to the cavity. The sand casting process is used for small batch production where pressure die casting is used for mass production.
The gravitational force inside a hollow sphere is zero. In a non-hollow sphere of uniform composition, the gravitational force varies inversely with the distance from the center.
If the sphere is conducting, all the charge is distributed uniformly on the outer surface of the sphere.
Yes, it can be (a hollow sphere, a hollow sound). The word hollow can also be a noun, meaning a gap, void, or a small valley.
a 44mm sphere that is hollow
*concave . curved like a segment of the interior of a circle or hollow sphere; hollow and curved
A sphere has one side. Not tricky! Unless the sphere is hollow, which would have two sides, inside and outside.
become uniformly distributed on the sphere's outer surface.
One if it is solid, two if it is hollow
A hollow sphere.
touch it with a charged object....
The electric FIELD inside a charged hollow CONDUCTOR is zero.
One if it is solid, two if it is hollow