What is a normal heart rate for a school age child?

A _______ results when an injury allows air to enter through a hole in the chest wall or the surface of the lung as the patient attempts to breathe, causing the lung on that side to collapse.

A. tension pneumonthorax B. hemothorax C. hemopneumonthorax D. pneumonthorax

The x-ray beam formed at the focal spot is monochromatic

Indicate whether the statement is true or false