Mini experiment

After discussing with my teacher, she suggested that I might further develop my idea by using different types of water. Different types of water have different electrical current and charges. 


So, I am going to conduct the same experiment as before but just changing the type of water
Type of water: Tape water, boiled water, alkaline water

Materials: Water, balloon, balloon pump, protractor, ruler, camera, scale, Hose, pail 

Hypothesis: The closer the balloon is to the stream of water, the larger the degree of ‘bend’ of the water. 

Variables:

Dependent: Degree of ‘bend’ of the water

Independent: Distance between the stream of water and the balloon

Constant: Size of the stream of water, size of the balloon, amount of static electricity produced, material of the balloon, amount of air pumped into the balloon

Experiment procedure:

1. Before starting off, calculate the electrical current of the different types of water with the ammeter

2. Make a scale and place it behind the stream of water (Ensure that the stream of water is flowing straight along the line drawn on the scale)

3. Use the balloon pump to pump up the balloon (about 30 pumps?)

4. Rub the balloon against your hair (about 40 times?)

5. Connect the bottle of water to the hose and invert it (so that water can flow down)
6. Make sure that there is a pail beneath the hose, so as to reuse the water again

7. Place the balloon near the stream (about 5cm)

8. Take a video of the process
9. Repeat the experiment again for 3 times

10. Tabulate the results

11. Repeat steps 2-10 for another 2 times (place the balloon at different distances away from the stream of water each time e.g. 9cm, 15cm)

12. Compare the tabulated results between the different types of water

Background research: 


Charges of water

- Ammeter : Used to measure the electrical current 

- The electrical current is determined by the charges of the water molecule 

- Water molecules contain both positive and negative charges

- (further research need to be done)

Problems:

water need to flow down in a stream, so I was thinking of  using a water faucet. However, if  I am going to test on the different types of water, then i might need an alternative way to get my stream of water. Maybe I could try pouring the water down a hose (to ensure that the size of the stream is equal.

I would need a lot of water, maybe about 5L of each type. I should also put a pail or something at the bottom to collect the water to be reused.