Why is making a prototype so important in the design process

Making a prototype is a great example of double checking. A prototype is the first made, which means it'll be tested. If a prototype was untested when complete, then it would be exceptionally harder to determine that everything is in working condition. No matter how skilled someone is.

In fact, skilled workers would prefer to test their prototypes to make sure it works. That way they'd stay on top.

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.

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