Principles of Simple Machines: Machines simply transmit mechanical work from one part of a device to another part. A machine produces force and controls the direction and the motion of force, but it cannot create energy. A machine's ability to do work is measured by two factors. These are (1) mechanical advantage and (2) efficiency. Mechanical advantage. In machines that transmit only mechanical energy, the ratio of the force exerted by the machine to the force applied to the machine is known as mechanical advantage.
The Rosicrucians are a mystical arcane society that played a major role in the development of Freemasonry. The rose and cross symbolize the society. It signifies crucifying the soul upon the body.
Types of Arrhythmia. There are many types of arrhythmias. Arrhythmias are identified by where they occur in the heart (in the atria or ventricles) and by what happens to the heart's rhythm when they occur. Arrhythmias that begin in the atria are called atrial or supraventricular (above the ventricles) arrhythmias. Ventricular arrhythmias begin in the ventricles. In general, ventricular arrhythmias caused by heart disease are the most serious. Premature beats are the most common type of heart arrhythmia.