Subcutaneous emphysema is often found in car accident victims because of the force of the crash. Chest trauma, a major cause of subcutaneous emphysema, can cause air to enter the skin of the chest wall from the neck or lung. When the pleural membranes are punctured, as occurs in penetrating trauma of the chest, air may travel from the lung to the muscles and subcutaneous tissue of the chest wall.
Both the Army and the Marine Corps teach that the maximum effective range of the M16A2/A3/A4 is 500 meters on a point target (individual enemy) and 800 meters on an area target (i.e. troops in the open).
Answers and Explanations: 1. Answer: C Explanation: The maximum range occurs for a launch angle of 45Â°. At this angle, the range is 163 meters-read from the graph in Figure 1 and listed in the fourth row of Table 1.o the best answer is the launch angle of 85Â°. 3. Answer: B Explanation: A careful inspection of either Figure 1 or Table 1 reveals that the range of a projectile has an identical value for more than one launch angle. For instance, the range is the same for a 15Â° and a 75Â° angle.