Question Number 12082 by chux last updated on 12/Apr/17
Answered by ajfour last updated on 12/Apr/17
$$\mathrm{t}=\frac{\mathrm{s}}{\mathrm{v}}=\frac{\mathrm{s}}{\left(\mathrm{c}/\mu\right)}=\frac{\mu\mathrm{s}}{\mathrm{c}} \\ $$$$\:\:\:\:\:\:\:\:\:\:\:=\:\frac{\left(\mathrm{1}.\mathrm{5}\right)\left(\mathrm{0}.\mathrm{9}×\mathrm{10}^{−\mathrm{2}} \mathrm{m}\right)}{\left(\mathrm{3}×\mathrm{10}^{\mathrm{8}} \mathrm{m}/\mathrm{s}\right)} \\ $$$$\:\:\:\:\:\:\:\:\:\:=\mathrm{45}×\mathrm{10}^{−\mathrm{12}} \mathrm{s} \\ $$
Commented by chux last updated on 12/Apr/17
$$\mathrm{wow}!\mathrm{thanks} \\ $$