# A Cross Section

The science of structure, order, and relation, which has developed from basic skills of counting, measuring, and describing the shapes of objects, is taught to students who study arithmetic. Its evolution has required an increasing degree of idealisation and abstraction of its subject matter, and the students must cope with logical thinking and quantitative calculation. All of these factors make math challenging, time-consuming, and confusing. In any case, WritersABC is here to help you. Here is an illustration of a query.

The figure shows a cross section of three long straight current-carrying wires. Notice we are using the common convention that crosses denote vectors going into the page and dots denote vectors coming out of the page. (a) Find the magnitude of the force per unit length, in newtons per meter, on wire A? (b) Find the magnitude of the force per unit length, in newtons per meter, on wire B. (c) Find the direction of the force per unit length vector on wire C.

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