s vers h convertisseur - Seconde vers Heure

Conversion derivation

Express both s and h in the same base unit s (second), then cancel the shared base unit.

1. 1

   Rewrite s in the base unit

   $$1\mathrm{s}=1\mathrm{s}$$
2. 2

   Rewrite h in the base unit

   $$1\mathrm{h}=3,600\mathrm{s}$$
3. 3

   Forward conversion

   $$\begin{array}{rl}1\mathrm{s}& =\frac{1\cancel{\mathrm{s}}}{3,600\cancel{\mathrm{s}}}\times 1\mathrm{h}\\ & =\frac{1}{3,600}\mathrm{h}\\ & =0.000277777778\mathrm{h}\end{array}$$
4. 4

   Reverse conversion

   $$\begin{array}{rl}1\mathrm{h}& =\frac{3,600\cancel{\mathrm{s}}}{1\cancel{\mathrm{s}}}\times 1\mathrm{s}\\ & =\frac{3,600}{1}\mathrm{s}\\ & =3,600\mathrm{s}\end{array}$$