1- a submarine has a circular porthole with a radius of 0.10 m. if a force of more than 2x106 n is applied, the porthole will fail. what is the maximum pressure that this window can support? to what maximum depth can the submarine dive, assuming that the interior is maintained at atmospheric pressure?

In order to solve this problem, it is necessary to apply the concepts related to the Pressure according to the Force and the Area as well as to the pressure depending on the density, gravity and height.

In the first instance we know that the pressure can be defined as

Where

F= Force

A =  Mass

In the second instance the pressure can also be defined as

Where,

Density of Fluid at this case Water

g = Gravitational Acceleration

h = Height

If we develop the problem to find the pressure then,

Through the second equation we can find the depth to which it can be submerged,

Re-arrange to find h

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.