1. What is computer ? ​

A computer is an electronic device that manipulates information, or data. It has the ability to store, retrieve, and process data. You may already know that you can use a computer to type documents, send email, play games, and browse the Web.

OR

A computer is a data processing machine. It does nothing until a user (or a script or a program) provides the data that needs to be processed and the instructions that tell it how to process the data. Any standard device or component that a user uses to instruct a computer is known as the standard input device.

A computer is a machine which help us in many critical cause it is a good machine

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

explanation:

answer; middle level managers;