A. Multiple myeloma is a malignant, clonal disorder of plasma cells that originates in the bone marrow. Itâs a relatively common disorder, accounting for 1% of all malignancies and 10% of all hematologic malignancies in adults.
torsion, n 1. , motion or state of torque in which one end of an anatomical component is twisted about its longitudinal axis as the opposite end is either immobile or moves in the opposite direction.
To start out with, lets first discuss what a torsion bar is. A torsion bar is a type of spring, just like a coil spring or leaf spring. To be exact it is a type of rotary spring.A spring can be defined to be an elastic member which exerts a resisting force when its shape is changed due to an applied force and returns to its original shape when the force is let off.o define how a torsion bar works we can compare it to other springs. A coil spring uses compression and extension and depending on the design of the spring can be a linear, step linear, or a progressive rate spring.