moulds

The desired shape is got by mixing a powder with water or other binder and moulding the resulting plastic mas..

The skeleton remains for sometime and the sediments harden around it. The soft parts disintegrate and the gaps are filled by fine materials. The skeletal parts also dissolve leaving behind only the moulds and casts. Many details are preserve..

These are a group of peculiar organisms which share characteristics of fungi and animals. Hence, they are also called as Mycetozoa . In the modern classification they are described as protistan fungi . Most examples of slime moulds are terrestrial and occur in cool, moist and shady places..

A toy is in the form a square pyramid. The edge of the lateral side measures 10cm. The height of the toy is 6 cm. How many of such toys can be moulded by melting a metallic piece of 5 m × 5 m × 8 m ? Approximate your answer. => 764707 or 768905 or 781250 or 791126..

3 iron bars of dimensions 1.25 m × 1.25 m × 5 m are melted to mould conical pieces of base radius 10 cm and height 20 cm. Find out the number of pieces that can be made taking π = 3. => 3906 or 85 or 117 or 11719..

Plants which have saprotrophic nutrition are Rhizopus (bread mould), Mucor (pin mould), Yeast, Agaricus (mushroom), many bacteria et..

Reactant in the manufacture of formaldehyde resins like bakelite and galalith by catalytic condensation with phenol or casein (milk protein). The resin can be moulded while hot into different shapes under pressur..

Since CO 2 is liberated in the initial stages, frothing is a common observation. All the CO 2 is driven out on continued heating and a clear viscous fluid mass is got. It is then poured into moulds of various shapes or stamped with die (a device for stamping, cutting, or mouldingh..

In thermoplastics, the intermolecular forces are intermediate between elastomers and fibers and the polymer chain has no cross-links. Thus thermoplastics can be moulded on heating. These polymers have no cross-linking between chains. Examples: Polyethylene, polystyrene et..

Polythene is formed by the addition polymerization of multiple monomers of ethylene or ethene. When liquid ethylene is polymerized at high temperature and pressure, a resin of polyethylene is obtained. It can be melted spun or moulded as desired. Note that in addition polymerization there..