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February 1, 2015

February 1, 2015

Posted by **Amy** on Wednesday, November 7, 2012 at 11:39pm.

(a) Calculate the absolute pressure at the bottom of a fresh-water 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

- PHYSICS (CHECK WORK) -
**drwls**, Thursday, November 8, 2012 at 3:30amSince your pressure is in Pascals, the window area must be in square meters (not square cm) to get the force in Newtons.

- PHYSICS (CHECK WORK) -
**Amy**, Thursday, November 8, 2012 at 10:15amThank you!

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