Wednesday, November 11, 2009

How to make a calculator work with a homemade battery

Question: Can you make a calculator work with a homemade battery?

Hypothesis: The vinegar will react with the wire and the galvanised nail to make electricity to charge the calculator.

Equipment: 2 galvanised nails, 2 bits of of masking tape, 1 marker, 3 wires, 2 cups, White Vinegar and a battery powered calculator.

Method: 1.The two cups are filled with vinegar and tape is put over the cups,it is pierced and marked positive and negative. 2.The nails are put into the negative end of the tape and a wire is put into the positive end and the other end of the wire is tied around the nail on the other cup. 3.Another wire is tied around the last nail and the last wire is put into the last positive hole and both wires are put into each end of the battery place in the calculator.

Observation: When the wires are hooked up to the calculator it turns on.

Explanation: The calculator worked because when the nail and the wire went into the vinegar it created negative and positive particles and the negative particles went through the wires and into the calculator and turned it on.


Will the calculator work with a vinegar powered battery? I don't know. My hypothesis is that the battery will power the calculator because there are two types pf metals causing a chemical reaction to form in the vinegar. For this experiment you will need the following... 2 bowls, tape, 3 wires, 2 galvanised nails [ zinc ], and last but not least calculator.
First 2 bowls are used or cups and are filled up with vinegar. Next the tape is put over the bowls and they are labeled positive and negative. One side of the wire is wrapped around the nail and the nail is put on the negative side through the tape and on the other bowl a whole is pierced through the positive side and the same wire is put through.
A whole is poked on both sides of the tape and the other nail is put through the negative side. The other wire is wrapped around the nail and through the positive side of the calculator. The other wire is put through the positive side of the other bowl and the other side of it in the negative side of the calculator.
Watch what happens.
My observation was that the calculator turned on.
The reason for this chemical changeis because the two types of metals react in the vinegar causing the calculator to work.

Wednesday, November 4, 2009

battery power

Question: Will a home make battery work with a home made battery?
Hypothesis: I think the calculator will work.
equipment: two cups, 4 wires, a battery powered calculator, vinegar and two galvanised nails (zinc) Method: first the vinegar is pored into the two cups. Now put one end of the wires into vinegar in both cups. Now I connect both nails to of the wires. Now connect the two cups with one nail wire and normal wire. Finally the wires connect to the calculator and then watch. observation: I swore that the calculator turned on when the wires were connected. explanation: The nail reacted to the vinegar and the wire reacted with the vinegar that charged up the calculator to make it turn on.