Formaldehyde

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G-4 Project : Hairspray

PHYSICS- How ethanol present in Hairspray has adverse effects on hair strands in terms of tensile strength.

Materials required- Clamp stand, 5 different hairsprays of different holding power, 12 strands of hair from the same person, of length 10 cm and 5 cm, and 1N weights

Procedure-

1. Place clamp stand on the table and make sure it is firlmp placed on table and doesn’t move
2. Attach hair strand to standing clamp securely by using tape to fix it in place. Start with the 5cm length and then the 10 cm length
3. Taking one pair of strands as control, attach one by one 1N weights on the hair strand by creating a loop, continue this till the strand breaks and record the weight at which the hair strands broke.
4. Now take a new pair of hair strands, and add 1 coat of hairspray in all directions and then attach to the clap stand. Repeat step 3, and continue this till all 6 values for all hairsprays+ the control are recorded.
5. Make a table recording results

Conclusion:-

Using formula of tension