Acircular section of 25 mm diameter is welded (all the way around) to a wall and subject to a torsional load. calculate the unit second moment of area for the circular weld pattern. 3 (enter the value in mm without any decimal places)

Explanation:

As we know that the moment of area of polar is also known as the second moment of area. It is used to describe resistance to torsional deformation, on cylindrical objects with an invariant cross section area.

Therefore, mathematically second moment of area can be written as,

Here, R is the radius of circular cross section.

Given that a circular section is welded to a wall has a diameter,

Therefore,

Therefore, second moment of area for the circular weld pattern is,

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.