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Applied science

Hi I was given a choice to pick between Investigating the properties of modern shampoos
Determine the relative viscosity, pH, foaming ability, cleansing effectiveness, and oil-emulsification abilities of different shampoos.
Or Investigating the factors that affect reaction time
Use real or virtual reaction timers to determine the effect of various factors such as caffeine, practice, age, gender, etc, on reaction times.
Can someone help me to pick one and which you would think would be easier to get the highest grade in?
(edited 4 months ago)

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