Yes it is a one piece shaft.
Depends on what you mean by "better". For the same dimensions, a solid shaft will be a bit stronger, but also a lot heavier. If you were to make a hollow shaft of the same weight, but a bigger diameter, it'd be a lot stronger than the solid shaft.
The moment of inertia of a solid round shaft is (\frac{π}{32} \times D^4), where D is the diameter of the shaft.
A hollow shaft has a empty space inside, while a solid shaft is completely filled. Hollow shafts are lighter and can be more flexible, while solid shafts are stronger and stiffer. Hollow shafts are often used when weight is a concern, while solid shafts are used when strength is more important.
Weight savings.
The formula to calculate the weight of a solid shaft is weight = volume × density × acceleration due to gravity. The volume of a solid shaft is calculated as π/4 × (diameter)^2 × length, where the density of the material and acceleration due to gravity are constants.
Shaft power P = (2(pi) * (angular Speed in rpm) * (Torque at shaft)/ 60 Torque of a solid shaft is given by (pi/16)* (Shear stress of material of shaft) * (Dia of shâft3).
A ball valve is a ball with a hole through it that rotates around its axis to expose the hole for flow or the solid wall of the ball for no flow. The butterfly valve is a flat piece that is supported in the middle by a shaft that opens or closes when the shaft is rotated.
yes
Most of the force in a shaft is carried by the outer layers of the shaft, and very. very little by the center. By using a hollow shaft you get almost the same turning strength for a lot less weight and material.
Yes it is a solid because if a piece of cheese is a solid then why is a block of cheese is not is the same thing
Yes, a piece of wood is a solid because it has a definite shape and volume, and its particles are closely packed together.
If, by 'one piece', you mean solid -as opposed to laminated- then the answer is that a solid core will have significantly-higher eddy current (circulating current) losses than a solid core.