Answer:
As per the statement:
The formula for speed of a tidal wave is:
![v = √(g \cdot h)](https://img.qammunity.org/2020/formulas/mathematics/college/oro58l8htul25e7nktc6957k8c7l7y9r2z.png)
where
V represents the speed of a tidal wave
g represents the acceleration due to gravity i.e g = 9.8
and
h represents the depth of the ocean in meters.
It is also given that If the ocean is 500 meters deep.
we have to find the speed of the tidal wave:
h = 500 meter , g = 9.8
then;
![v = √(9.8 \cdot 500)](https://img.qammunity.org/2020/formulas/mathematics/college/2wwpaihxgv03533qyr7dtu0hprk9xjj7r0.png)
![v = √(4900)](https://img.qammunity.org/2020/formulas/mathematics/college/6x5s1p6ejxhp6psm6q4lhicj2nvjtahkch.png)
Simplify:
![v = 70 m/s](https://img.qammunity.org/2020/formulas/mathematics/college/xhp5pttoyra82wx33b85f2uz2cc37ucgnq.png)
therefore, the speed of a tidal wave will be 70 m/s