Physics

Problem

Which of the following algebraic sums is dimensionally meaningful, that is, the two quantities listed can be directly added? a) Power (

\text{W}

) + Energy (

\text{J}

) b) Pressure (

\text{Pa}

) + Energy density (

\text{J}\,\text{m}^{-3}

) c) Work (

\text{J}

) + Force (

\text{N}

) d) Electric potential (

\text{V}

) + Electric field (

\text{V}\,\text{m}^{-1}

)