(Oceanography) The pressure, P, exerted on an underwater object can be determined by this formula:
P= ?? gh
?? is the density of water, which is 100 kg/m3.
g is the acceleration caused by Earth's gravity, which is 9.8 m/s2.
h is the depth of the object in the water in meters.
a. Determine the units of P by caletilating the units resulting from the right side of the formula. Check that your answer corresponds to the units for pressure listed in ruble 1.1.
b. Determine the pressure on a submarine operating at a depth of500meters.
c. 
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