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We use y_y axes

Q: To design a building which type of moment of inertia you use about xaxis about yaxis or polar moment of inertia?

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It is impossible to tell you exactly what the polar moment of inertia is for a motor load system just from your question. We would need to know the specifications of the motor load system to make that calculation.

First off, the question should be either "What math is used in Mechanical Engineering? or What is the highest level of math someone needs to take in order to become a Mechanical Engineer?" Most college programs require through Differential Equations to earn a BS degree in ME. This means you would need to take Calculus 1, 2, and 3, Linear Algebra, and Differential Equations once you get to college. It is assumed that most students going into engineering will have no less than Pre-Calculus before entering college while most will have taken Calculus. Now each college has different requirements for fulfilling the math requirements for an engineering program. I know from my experience, Georgia Tech teaches math differently than most colleges because they combine Calc 1-3 and Linear Algebra into just 3 courses instead of 4. My suggestion is look at the program requirements at the school you are interested in first. Second, evaluate whether you feel that you can learn the math. For those who struggle with math, if you really want to be an engineer, I suggest going to a smaller school where the class size will be smaller. This will have better student/teacher interaction so you can get more help.

Hydrogen bonds

Polar molecules have partial negative and partial positive charges on opposing sides. They have a net dipole as a result of the opposing charges.

Each object should be responsible for its own logic and data, and so each object's tests should be responsible for its own tests. The top-down approach is the polar opposite of this design, as the top level object would be responsible for testing all of its enclosed objects. This works well in procedural programming, but explicitly violates the concepts of object oriented programming, which states that no object should be concerned about the details of any other object's internal design.

Related questions

Moment of inertia has unit kg m2

Polar moment of inertia of an area is a quantity used to predict an object's ability to resist torsion.Moment of inertia, also called mass moment of inertia or the angular mass, (SI units kg m2, Imperial Unit slug ft2) is a measure of an object's resistance to changes in its rotation rate.

It is impossible to tell you exactly what the polar moment of inertia is for a motor load system just from your question. We would need to know the specifications of the motor load system to make that calculation.

As with many other physical quantities, you need to use integration.

Rotational inertia is sometimes called spin. It involves the movement of a mass around an axis. This moving mass will have some measure of kinetic energy that is due to the fact that it is spinning. The variables are the shape and the mass of the object, the way the mass is distributed within the object, the speed of its rotation, and the location of the axis of spin through the object. The moment of inertia might also be called angular mass, mass moment of inertia, rotational inertia, or polar moment of inertia of mass. Use the link below for more information.

It is defined as ratio of the product of modulus of rigidity and polar moment of inertia to the length of the shaft. Torsional Rigidity is caluclated as: Torsional Rigidity= C J/l

It is defined as ratio of the product of modulus of rigidity and polar moment of inertia to the length of the shaft. Torsional Rigidity is caluclated as: Torsional Rigidity= C J/l

I2O is Polar

yes. it has a dipole moment.

The day would lengthen by a small amount due to the change in the Earth's moment of inertia as the water would spread and its distance from the axis of rotation would increase.

no it is non-polar, because there is no dipole moment

Polar - it has a group with a strong dipole moment -NO2