Posted by **Nikki** on Friday, January 29, 2010 at 2:44pm.

I'm having a really hard time with this physics problem...not really sure where to begin or which equation to use....please help:

You are assigned the design of a cylindrical, pressurized water tank for a future colony on Mars, where the acceleration due to gravity is 3.71 meters per second per second. The pressure at the surface of the water will be 100 kPa , and the depth of the water will be 13.9m . The pressure of the air in the building outside the tank will be 85.0 kPa .

Find the net downward force (in newtons) on the tank's flat bottom, of area 2.30 , exerted by the water and air inside the tank and the air outside the tank.

Any help would be much appreciated! Thank you!

- physics -
**bobpursley**, Friday, January 29, 2010 at 3:28pm
The "pressure at the surface of the water", what is above the water? Air at 100kPa? So, is this gauge pressure in relation to ouside the tank, or absolute pressure?

- physics -
**Randi**, Friday, January 29, 2010 at 4:25pm
I believe he pressure on the surface is the controlled gauge pressure in the tank in relation to the outside.

## Answer this Question

## Related Questions

- web design - why would you use hexadecimal value instead of the name color?. I ...
- algebra - Hi, can someone please help me with this question? When each of three ...
- physics - i'm in 5th grade and i really need some help. in science, we got this ...
- math please help - Point X is on line AC such that AX = 3 CX = 12. If <ABC...
- Statistics - Please help with this problem. Really having a hard time. How many ...
- calculus - Having a really hard time with this! e^8x^2-5 = 14 solve the ...
- Physics - A 30m high cylindrical water tank has a diameter of 14m. The tank is ...
- Biology - Is there any biology websites for teens??? (NOT games! notes and ...
- math - I must simplify this equation and am having a hard time (5+2a+3a)-(a2+a-6...
- Math - You are in charge of a tank to be used for water storage. Your boss has ...

More Related Questions