Ideas for a electricity or sound project?

Question

I have a demonstrative project due tomorrow for my Physics 2 class. After attempting a rail gun and an ionocraft, I am out of ideas. I have copper wire, an ohm meter, and can obtain any other simple materials. Please help me.

Answer 1

OK, don't panic! You don't have much time so keep it simple but unique. If you can buy or build a simple audio amplifier with a gain of, say, 50, there may be hope. Build and demonstrate a simple audio based heart monitor. Go to Radio Shack and purchase a piezoelectric sound transducer, p/n 273-073A for about $1.99 each. Carefully remove the plastic housing from around the transducer and build it into another type of plastic housing such that the transducer elements is flush with the housing. This is necessary for the element to be pressed against the chest. A pill bottle cap works really well. Connect a wire (two leads) between the transducer and the amplifier. Best results can be had when the sound comes from a small speaker, but headphones works well too.

The quality of heart-beat sounds ravels that heard by a doctor's stethoscope.

Good Luck.

Answer 2

You don't have time to go to Radio Shack.

Here's what you do. Wrap your insulated copper wire around a ferro metal rod (maybe a spike or big nail) to make a coil around it. Count the number of turns (N) as your wrap the metal rod.

Now run a known potential across the extreme ends of the coil (copper wire). You can use a nine-volt battery or something similar. Use brad, tacks, or something like that and pass the electromagnetic coil you just built over them. Count how many are picked up by the magnetism.

Now unwind the coil so that you have N/2 wraps around the spike. Repeat the experiment with the tacks. So the question is...will the number of tacks you pick up with N wraps be the same or close to it as the number of tacks you pick up with N/2 wraps around the spike? Why?

Easy, but meaningful, project.

Answer 3

possibly a cylinder coated with magnets with all with the polarity an identical, pointed faraway from the middle. different than the magnets are somewhat pointed faraway from center, mabye 10 levels. Then create a concave tube (greater advantageous than the cylinder) decrease in a million/2 so which you basically have the backside left. hide that with magnets an identical polarity with the aid of fact the magnets with the aid of fact the cylinder (so as that they push faraway from one yet another). those magnets are pointed the choice 10 levels faraway from center. Then placed the cylinder into the tube, theoretically it may flow with the aid of fact the magnets are repelling against one yet another. And the cylinder could desire to start spinning with the aid of tilted magnets. Theoretically it may try this perpetually. Then hook up the cylinder to a pair form of generator. not sure if this could artwork, whether it is an theory.