What would you need to have on your foley stage

You will need many props for your Specific tracks (whatever you see in the film!). It's impossible to say what you will need until you see the picture and as time goes by you will add to your collection (if you have space!) - garbage day in my neighborhood is 'golden day' as I collect some of best props from the stuff people throw out: old bicycles, doors, sinks, wood, metal, desks, etc.

answer: when the substance contain the two parts (polar and non-polar) like soap.

explanation:

soap is produced from the basic hydrolysis of ester "saponification", it is considered as a salt of hydrocarbons. the soap molecule contains the two parts: a polar group   (-coo-na+) and a non-polar group (r-hydrocarbon part). the polar group is called the head and the tail is the non-polar group. the polar group is hydrophilic in nature (water loving) and the non-polar group is hydrophobic in nature (water repelling).the polar/non-polar nature of a substance is useful that it can dissolve the non-polar substances by the polar part and also can dissolve the polar substances by the non-polar part. it commonly used in detergents and soaps.