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Slide rule is a mechanical analog calculator based primarily on the principle of logarithms. Before the widespread adoption of electronic calculators, it was a fundamental tool used especially in science and engineering for performing multiplication, division, root extraction, exponentiation, and various trigonometric functions. Its structure consists of logarithmically scaled rulers that move relative to each other and a movable cursor (also called a slide or indicator) that enables alignment b

Merge sort is one of the most efficient sorting algorithms. It is based on the divide and conquer strategy. Merge sort repeatedly divides a list into multiple sublists until each sublist contains only one element, then merges these sublists into a single sorted list.Divide and conquer solves subproblems recursively; each subproblem must be smaller than the original problem and each must have a base case. A divide and conquer algorithm has three parts:Working PrincipleMerge Sort Algorithm in Java

The starter motor is an electric motor used to initially rotate internal combustion engines. It converts electrical energy from the battery into mechanical energy to turn the crankshaft, enabling the engine to begin operating under its own power. This system serves as a fundamental component in initiating motion in automobiles and other motor vehicles.Structure and Operating PrincipleThe starter motor consists of components such as the solenoid (magnetic relay), starter gear, stator, rotor, brus