I am still away from home and civilisation, so I have used this time to think about this SRP. I have come to the decision, to do the third idea, which is to test the durability of nail polishes by dropping a hard object on a painted surface to see how much is chipped off.
Because I still need approval from Ms Zhang, if I were to continue with this experiment, the experimental variable would be the type of nail polishes and the controlled variables would be the plastic sheet it is painted on and the amount of varnish applied.
Aim: To find out which nail polish is the most durable
Hypothesis: The more hardening agents in the nail polish, the stronger it is.
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