Tsunamis $($or tidal waves$)$ are very$-$long$-$wavelength water waves generated by earthquakes. A tsunami originating in Japan has a wavelength of $5\mathrm{.}505\mathrm{.}5010104$m and a period of $20\mathrm{.}020\mathrm{.}0$minutes$.$ Find how much time it takes for the tsunami to travel across the Paci$$c Ocean to California, $8\mathrm{.}001038\mathrm{.}00103$km away.

Part $1+$

Give an algebraic expression for finding the time required for a wave to travel a given distance dd in terms of its wavelength $($$),$ period $($TT$),$ and dd$.$

$($Enter as lambda$)$

tt $=$

Your answer is interpreted as follows: d$/$

This answer cannot be accepted $($no penalty assigned$).\text{'}/\text{'}$ is an invalid final character in d$/$

Incorrect answer.

Marks for this submission: $0\mathrm{.}000/0\mathrm{.}100.$

Part $2$

Find how much time it takes for the tsunami to travel across the Paci$$c Ocean to California.