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Question:

how can i make a working model of a fire extinguisher?

pls help me i need it for a school project

Answer:

all youll need is a screw driver or drill and put the screw in A smoke detector should be installed in every room that will be occupied. Be sure to keep the detector away from fireplaces and wood stoves to avoid false alarms. Place smoke detectors at the top of each stairwell and at the end of each long hallway. Smoke rises easily through stairwells. If you should put a smoke detector in your kitchen, be sure to keep it away from cooking fumes or smoking areas. Proper mounting of a smoke detector also is important. You can mount many detectors by yourself, but those connected to your household wiring should have their own separate circuit and be installed by a professional electrician. If you mount your detector on the ceiling, be sure to keep it at least 18 inches away from dead air space near corners. If you mount it on the wall, place it four to 12 inches below the ceiling and away from corners. Keep them high because smoke rises. Never place them any closer than three feet from an air register that might re-circulate smoke. Don't place them near doorways or windows where drafts could impair the detector operation. Don't place them on an uninsulated exteri
Any thing non porous: IE plastic OR GLASS. Check that the resin will not mechanically lock into whatever your mold is, like under a lip, or that the mold can be cut to release the resin casting. This is why flexible rubber molds are used, so you don't ruin or waste the mold each time. BUT certain resins may be inhibited by Oils and may not cure properly. Always check what the manufacturer recommends in their specs for a mold release. You do not want a gooey mess or an unreleasable (stuck) mold.

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