Estimate the Number of Times the Earth Will Rotate on Its

question 28

Multiple Choice

Estimate the number of times the earth will rotate on its axis during a human's lifetime.

• A)3 × 10⁴
• B)3 × 10⁵
• C)3 × 10⁶
• D)3 × 10⁷
• E)3 × 10⁸

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Definitions:

PLC

Stands for Programmable Logic Controller, a digital computer used for automation of electromechanical processes, such as control of machinery on factory assembly lines.

CPU

The Central Processing Unit, which is the primary component of a computer responsible for interpreting and executing most of the commands from a computer's other hardware and software.

Ladder Logic

A programming language used to represent control logic in easily understood symbols arranged in a structure resembling a ladder, widely used in industrial and mechanical applications.

Scan

The process by which a PLC (Programmable Logic Controller) systematically checks its input signals and updates its outputs.