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Speclore

Si units, prefixes 與 base quantities

International 系统 的 units (si) base units, derived units, 與 metric prefixes.

unitsprefixes

Overview

Engineering reference data for SI Units, Prefixes and Base Quantities in basics.

Key Formulas

Ohm's Law

V=IRV = IR

Voltage = Current × Resistance.

Newton's Second Law

F=maF = ma

Force = mass × acceleration.

Conservation of Energy

Ein=Eout+ΔEstoredE_{in} = E_{out} + \Delta E_{stored}

Energy balance.

Variables

SymbolDescriptionUnit
VVVoltageV
IICurrentA
RRResistanceΩ
FFForceN
mmMasskg
aaAccelerationm/s²

References