Answer:
70 m/s
Step-by-step explanation:
<u>"The speed of a tidal wave in meters/second is given by the square root of the product of the acceleration due to gravity on Earth (9.8 meters/second2) and the depth of the ocean in meters":</u>
The sentence above can be interpreted into the equation shown below (letting speed of tidal wave be "s", acceleration due to gravity be "g", and depth be "d"):
<em><u>Given d = 500 and g = 9.8, we find speed (s):</u></em>
Hence, the speed is 70 meters per second.