Wednesday

August 20, 2014

August 20, 2014

Posted by **Chan** on Saturday, November 28, 2009 at 9:56pm.

(a) Calculate the absolute pressure at the bottom of a freshwater lake at a depth of 28.7 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.

(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 40.9 cm?

So, I try to convert 40.9cm to 0.409*9.8 but, it not right.

- physics -
**drwls**, Sunday, November 29, 2009 at 1:26amWhy would you multiply the diameter by g?

Force equals pressure times area.

You are still mispelling the subject.

A "physic" is a laxative.

- physic -
**Mary**, Wednesday, January 26, 2011 at 8:46pm40.9cm = 0.409m

diameter/2 = radius

0.409m/2 = 0.2045

area of circle = (pi)r^2

F=PA

F=(what you got for pressure from Part A)((pi)r^2)

**Related Questions**

physic - Hi! need help please thank you so much. Question:(a) Calculate the ...

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

Intro to Physics - (a) Calculate the absolute pressure at the bottom of a fresh-...

PHYSICS (CHECK WORK) - Can somebody please check my work. I got part a right, ...

physics - If you dive to a depth of 10m below the surface of a lake, Part A what...

Physics - At the surface of a freshwater lake the air pressure is 1.0 atm. At ...

Physics - At what depth beneath the surface of a lake is the absolute pressure 2...

Physics - If you dive to 50 m below the surface of a lake, a) what is the ...

Physics - A swimmer has 8.20 x 10^-4 m^3 of air in his lungs when he dives into ...

Chemistry - At a depth of 200 meters in Lake Nyos, the pressure of pure CO2, ...