Ononot — The Planck constant h is 6.626 \times 10^{-34} \text{ J}\cdo

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The Planck constant $h$ is $6.626 \times 10^{-34} \text{ J}\cdot\text{s}$ . If energy $E = hf$ and frequency $f$ is measured in $\text{THz}$ ( $10^{12} \text{ Hz}$ ), which expression correctly calculates the energy $E$ in $\text{Joules}$ ?