# Physics -I'm stumped

Europa, a satellite of Jupiter, appears to have an ocean beneath its icy surface. Proposals have been made to send a robotic submarine to Europa to see if there might be life there. There is no atmosphere on Europa, and we shall assume that the surface ice is thin enough that we can neglect its weight and that the oceans are fresh water having the same density as on the earth. The mass and diameter of Europa have been measured to be 4.78×1022 kg and 3130 m, respectively.

If the submarine intends to submerge to a depth of 110 m, what pressure must it be designed to withstand?

If you wanted to test this submarine before sending it to Europa, how deep would it have to go in our oceans to experience the same pressure as the pressure at a depth of 110 m on Europa?

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1. Tbe weight of a column of water of area A and height H is

weight=densiy*area*h*k were k is the acceleration of gravity

Pressure = weight/Area

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bobpursley

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