PHYSICS (CHECK WORK)
posted by Amy on .
Can somebody please check my work. I got part a right, but my answer for part b is wrong.
(a) Calculate the absolute pressure at the bottom of a freshwater lake at a depth of 25.6 m. Assume the density of the water is 1.00 103 kg/m3 and the air above is at a pressure of 101.3 kPa.
352180 Pa
(b) What force is exerted by the water on the window of an underwater vehicle at this depth if the window is circular and has a diameter of 33.1 cm?
diameter=33.1cm
r=1/2 diameter
area=pi*r^2
area=pi(16.55)^2
area=860.49
Force=Ptotalx area
Force=303047368.2

Since your pressure is in Pascals, the window area must be in square meters (not square cm) to get the force in Newtons.

Thank you!

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