How do magnetic fields affect the rate of flow of water?
The materials required for this cool science fair project are:
- 400 ml of tap water
- 50 grams of salt
- 2 beakers
- 1 burette
- 1 measurement cylinder
- 1 stop watch
- 2 large permanent magnets
1. The independent variables of this science fair project is the type of water used (salt solution and tap water) and whether the a magnetic field is or is not present. The dependent variable is the time taken for the fluid to flow out of the burette. This is measured using a stopwatch. The constants control variables are the amount of water used, the strength of the permanent magnet used, the flow rate of the burette and the room temperature.
2. The experiment layout is as shown in figure 1 above.
3. Fill 200ml of tap water into the measuring cylinder. This is thenpoured into the burette. The flow rate of the burette is set and the same conditions will be used for the subsequent experiments.
4. The time taken for the 200 ml of tap water to flow out of the burette (without any magnetic field applied) is measured. Repeat this process up to 5 times and the average time taken will be calculated and recorded in the table provided below. .
5. Step 4 is repeated by placing 2 permanent magnets at the bottom of the burette as shown in figure 1. This measurement is again, repeated 5 times for us to obtain the average timing required, which will be recorded in the table provided below.
6. Mix 50 grams of salt with 200 ml of tap water in a separate beaker. Using the measuring cylinder, pour 200 ml of salt solution into the burette. Repeat steps 4 and 5 using the salt solution. The average timing taken for 5 tests are calculated and recorded in the table provided below.
Basic safety requirements