A. which chip is thought to be the first microprocessor? how many transistors roughly did it use?

A micro processor is an integrated circuit that have all the functions of a central processing unit of a computer.
The chip which is thought to be the first microprocessor is INTEL 4004. It was manufactured by Intel in 1971. Intel 4004 has 2,300 transistors. 

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.

2is the answer trust me