Alvin is the world's longest-operating submersible vehicle and since 1964 has carried more than 12,000 scientists to explore the deep ocean. Operated by the Woods Hole Oceanographic Institution, Alvin has an operating depth of 4480 meters
a) What is the pressure of the ocean water at this depth? answer Pa
b) Alvin's viewing ports are made from 8-cm-thick glass and have a diameter of 16.9 cm. What is the inward force on such a port at a depth of 4480 m? answer in N