IGCSE CCEA Engineering: Formula and Theorem Quick Reference Handbook | IGCSE CCEA 工程：公式定理速查手册

📚 IGCSE CCEA Engineering: Formula and Theorem Quick Reference Handbook | IGCSE CCEA 工程：公式定理速查手册

This quick reference handbook brings together the essential formulas, theorems and unit conversions required for the IGCSE CCEA Engineering course. It is designed for revision, problem solving and practical applications, covering mechanics, materials, electricity, energy, fluid power and manufacturing calculations.

本速查手册汇集 IGCSE CCEA 工程课程所必需的重要公式、定理与单位换算。手册适用于复习、解题和工程应用，涵盖力学、材料、电学、能量、流体动力与制造计算。

1. SI Units and Prefixes | 国际单位制与词头

Engineering calculations always start with standard SI base units: length in metres (m), mass in kilograms (kg), time in seconds (s), electric current in amperes (A) and temperature in kelvin (K). Derived units include newton (N) for force, pascal (Pa) for pressure, joule (J) for energy and watt (W) for power.

工程计算始终从标准国际单位制基本单位开始：长度用米（m）、质量用千克（kg）、时间用秒（s）、电流用安培（A）、温度用开尔文（K）。导出单位包括力用牛顿（N）、压力用帕斯卡（Pa）、能量用焦耳（J）、功率用瓦特（W）。

Prefixes allow very large and very small values to be written clearly. Use the table below to convert before substituting into formulas.

词头可用于清晰表示极大或极小的数值。代入公式前，应使用下表完成单位换算。