Question

A research submarine has a 40.0 -diameter window 8.40 thick. The manufacturer says the window can withstand forces up to 1.20×106 . What is the submarine's maximum safe depth?

Answer 1

The pressure inside the submarine is maintained at 1.0 atm

Answer 2

Hi.Thanks

Answer 3

Hi, i'd like to help, but can you specify the unit first?

Answer 4

40 cm-8.40 cm-1.2 times 10^6 N

Answer 5

I have no idea how to do this one,especially because it involves thickness

Answer 6

Yes, the thickness doesn't matter. We need only force and area.

Answer 7

Can youu explain more

Answer 8

Well, it says 20 cm diameter window, what is window area?
Then find
maximum pressure=maximum force/window area.

Answer 9

I got 0.50265 for area

Answer 10

P=rho.g.h

Answer 11

F=pghA

Answer 12

1.2 time 10^6=.50265 times 1000 times 9.8 times h

Answer 13

For h I got 243

Answer 14

but it is wrong

Answer 15

How did you find the area?

Answer 16

Sorry I mean area is 012566

Answer 17

but that didnt work out too

Answer 18

I got 974.4

Answer 19

you have to include pressure at sea level to find the pressure at any depth.
p=p0+rho*g*h
h=(p-p0)/rho*g
where p is maximum pressure we talked before.
You worked it this way?

Answer 20

nope becuase the pressure inside is 1 atm

Answer 21

I guess thickness might matter?

Answer 22

I don't fin the relevance including thickness in this problem. It only matter if maximum force is not known. The thicker, the larger force it can handle.

Answer 23

so what is wrong.Can you calculate and see what u get

Answer 24

What is density of water used in this problem?

Answer 25

1000 kg/m3 I guess

Answer 26

or maybe I should use salt waters density?

Answer 27

I got 946,21 for that density. If it's wrong too, try salt water.

Answer 28

964,21

Answer 29

946 is coorect

Answer 30

not 964.what an accident ;ol

Answer 31

You mean 964 is wrong?

Answer 32

yea

Answer 33

the answer is 947

Answer 34

They used 1030 for seawater

Answer 35

Try sea water, i think you'll get that number

Answer 36

Thank you so much! I

Answer 37

can you teach me how to solve pascal principle types of problems

Answer 38

Heheh, you're welcome. I won't let my fan down :)

Answer 39

like the hydrolic types

Answer 40

I think so.