Assertion: wave's energy | /r/CapableOf | touch the bottom of the sea
Facets:
value: at about 50 feet
type: OTHER
Source sentences:
text: The groundswell owes its name to the fact the energy of long period wave extends down, and comes into contact with the ocean floor earlier, at a depth of around 1,000 feet, while wind swells only touch the bottom of the sea at about 50 feet.