If by "specific weight" you mean density, the density of melted plastic is pretty much the same as the cooled and solidified plastic. There are a number of different plastics out there, and their densities vary. They might range from a bit under a gram per cubic centimeter to a bit over 1 and 1/4 grams per cubic centimeter for "typical" plastics (and with no air injected into them).
yes as it is plastic
Buy a new element.
Most plastic bottles will be melted or burned by fire!
Plastic plates are recycled in the same fashion that other plastic materials are recycled. The plates are separated, ground into chips, washed, and then melted.
small plastic pices are melted and put into a round mold and then the mold closes and it spins. a few mins later the plastic is set and they take the ball out. they put a stopper in a hole on the ball and then they fill it with air.
he melted
yes as it is plastic
Yes, melted plastic can hurt you. The primary danger is from a burn. Melted plastic is hot, and it tends to stick to skin and clothing. It is exceptionally dangerous stuff in that regard.
Plastic is always going to be plastic. When plastic is melted it becomes hard.
melted plastic
No, heating would cause it to lose mass. It may be nearly unmeasurable, but it would lose weight.
These plastic bottles are first shredded to produce plastic chips. Depending on what they will be recycled to make these plastic chips may or may not be melted.
Smoke or gas let off by a melted plastic spoon is toxic and should be avoided. The cooled plastic can be disposed of in the trash in a normal way.
Ammonia is not a cleaner we'd choose to remove plastic from surfaces. It (ammonia) won't dissolve or "melt" the plastic, so it is ineffective in removing melted plastic from surfaces.
NO
a long piece of plastic
Plastic is melted by applying thermal energy -- heat. Plastic "bits" are dumped into a hopper, and a screw type feed mechanism forces them through a heated section of the screw housing. Resistance heating elements are used, and they convert electricity to heat energy to melt the plastic. The temperature is controlled by electronics, and run appropriately for the type of plastic being melted. This melted plastic is then forced out the end into molds in a process called injection molding.