For example, studies have shown that high acceleration towards the head of magni

Question

For example, studies have shown that high acceleration towards the head of magnitude

4g to 7g can produce blackout and cerebral ischemia, whereas acceleration directed towards the head having a magnitude between 4g and 5g can result is asystole as well as bleeding from the eyelids, the surface of the eyeballs, and mucous membranes. The Vomit Comet is the nickname for the NASA airplane that allows individuals to experience short periods of zero gravity. The plane performs a series of parabolic trajectories that entail going through a series of steep climbs and descents. During these parabolas weightlessness is experienced near the peak of the parabola while reduced gravity is felt on the ascent and descent (see figure above). A typical radius of curvature for these trips is 2 km. Suppose that during one of the trajectories the pilot pulls up too aggressively causing the plane to follow a circular path with a radius R=1km. Determine:

Explanation / Answer

1. Pascal's law says that when pressure is placed on a fluid in a container, the pressure will disperse equally to all parts of the container. That is, the pressure of fluid furthest away from the pressure point, and the pressure of fluid closest to the pressure point will be the same — it does not diminish, for example, with distance. The principle was named after the French mathematician and philosopher Blaise Pascal who discovered it in the 1600s. It applies to static conditions such as in a closed container, and not dynamic conditions where other conditions could affect pressure values. A common application of the law is in the hydraulic press which is able to convert a small force into a larger one. There are a variety of Pascal's law experiments. Perhaps the most basic demonstration involves stepping on a balloon filled with air. Though Pascal's law has to do with fluids in a closed container, it's important to note that in physics a fluid can be a liquid or a gas, and air is a type of gas. In this example, the flexible walls of the container shows how the pressure caused by foot disperses the air equally throughout the balloon. The balloon will bulge uniformly in all directions, not just, for example, linearly from the foot. 2. http://www.aviation-health.co.uk/news/browse.php?load=aibs.html

Related Questions

Navigate

• Browse (All)
• Browse F
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.