Sometimes this reactivity of your airways after an infection is the first sign you have asthma. The bit of blood may be a little blood vessel trauma from forceful coughing. It is time to see your doctor for an evaluation. Hope this helps; take care:) ...Read more.
A solenoid is a type of electromagnet when the purpose is to generate a controlled magnetic field.If the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet. solenoid is a type of electromagnet when the purpose is to generate a controlled magnetic field.
A goniometer is used to measure the range of motion of various joints around the body.1  purpose: the aim of this test is to measure the flexibility of a joint, which is important for injury prevention and execution of many sporting movements.2  equipment required: Goniometer. equipment required: Goniometer. 2  procedure: To measure the range of motion at a joint, the center of the goniometer is positioned at the axis of rotation of a joint, and the arms of the goniometer are aligned with the long axis of the bones of the adjacent segments or to an external reference.