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When a pilot takes a tight turn at high speed in a modern fighter airplane, the blood pressure at the brain level decreases blood no longer perfuse the brain, and the blood in the brain drains. If the heart maintains the (hydrostatic) gauge pressure in the aorta at 120 torr (or mm Hg) when the pilot undergoes a horizontal centripetal acceleration of 4g, what is the blood pressure (in torr) at the brain, 30 cm radially inward from the heart? The perfusion in the brain is small enough that the vision switches to black and white and narrows to "tunnel vision" and the pilot can undergo g-LOC ("g-induced loss of consciousness"). Blood density is 1.06 x 103 kg/m3.
In a particular crash test, an automobile of mass 1621 kilogram collides with a wall and bounces back off the wall. obtain the magnitude of the impulse due to the collision
Tarzan is in the path of a pack of stampeding elephants when Jane swings in to the rescue on a rope vine, hauling him off to safety. The length of the vine 25 m, and Jane starts her swing by the rope horizontal. If Jane's mass is 54kg, and Tarzan's..
A concave mirror is to form an image of the filament of a headlight lamp on a screen 8.00 m from the mirror, How far in front of the vertex of the mirror should the filament be placed
What was the final temperature of the coins. What is the train's acceleration after its wheel begins to stick.
A spherical mirror has a radius of curvature of + 30cm. An object that is 8.0 cm tall is placed 20 cm in front of the mirror. a) What is the position at which the image is formed? b) What is the height of the image? c) Is the image real or virt..
A pendulum has the period equal to 1.000 s on the earth. What would be the period of the same pendulum when measured on the surface of the moon
My computer operates at a frequency of 3 GHz. What is the period of this signal
A block of ice of mass 4.10kg is placed against a horizontal spring that has force constant k = 230N/m and is compressed a distance 2.40×102m. Calculate the work done on the block by the spring
A horizontal force does 50 J of work on a box, while the kinetic friction force, between the box and the floor, What is the cange inn the box's kinetic energy
A heat engine operates between a high-temperature reservoir at670K and a low-temperature reservoir at 320 K. What is the magnitude of the net change in entropy as a result of this cycle
A woman with mass 49.5 kg is standing on the rim of a large disk that is rotating at 0.490 rev/s about an axis perpendicular to it through its center. Calculate the magnitude of the total angular momentum of the woman-plus-disk system
A mass on a spring bobs up and down over a distance of 25 cm from the top to the bottom of its path twice each second. What are its period and amplitude
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