science fair project

[yourmomonacid 10+ year member]

hey i have a science fair project due next monday i was wondering if anyone had any good ideas i was thinking of doing something with my subs and get a db meeter and run 800 watts then run 400 and see the difference..iono if you have any ideas please help

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[jer_stud56 10+ year member]

You're still in school? That has to ****. It'd take a while to switch back and forth from 800 to 400 fast enough for every to not have to wait. I spose theres some way..but it'd take a while to figure out and make charts (I remember the science fair). Have fun //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif.

 

[ShRapNeR 10+ year member]

make a ummmmm....

bicycle out of like cardboard and duct tape and shit... then actually ride it around the room, showing how strong duct tape is

never been to a science fair so i don't know .

 

[supa_c 5,000+ posts]

do an impedance change and meter it, like about how electrical resistance makes things less efficent/more efficent. just an easy idea. prob eaiser than doing the wattage change

 

[sumone 10+ year member]

do what I did in 6th grade...grab a comb, a plastic 2-liter bottle, 2 pieces of foil, and 2 pieces of thread. tape a piece of foil to the thread....

...nevermind, I forgot the actual steps but it's basically showing static electricity...lol

 

[Acidburn 5,000+ posts]

to switch resistance real fast, put a terminal for each voice coil so that all wiring is on the outside of the box

or another idea is dry ice and water in a plastic bottle...

or aluminum foil and Draino in a plastic bottle...

 

[ShRapNeR 10+ year member]

to switch resistance real fast, put a terminal for each voice coil so that all wiring is on the outside of the box
or another idea is dry ice and water in a plastic bottle...

or aluminum foil and Draino in a plastic bottle...

don't those explode?

 

[Acidburn 5,000+ posts]

yes... 10 char

 

[Alphafrog1 10+ year member]

to switch resistance real fast, put a terminal for each voice coil so that all wiring is on the outside of the box
or another idea is dry ice and water in a plastic bottle...

or aluminum foil and Draino in a plastic bottle...

or sodium and water...

 

[Radar 10+ year member]

^^^ If he wants an explosion.

 

[monte_carlo97 10+ year member]

For i project i made a jacobs ladder. The thing were the spark travels up two 5 ft copper tubes. Takes a lot of custom fabrication for a circuit board and some parts that are hard to find.

 

[jemorgan85 10+ year member]

^^^ If he wants an explosion.

It would just instantly cause fire, not explode.