Suppose that there is a partial blockage of the aorta, which normally pumps about 5 L of blood per minute. If the diameter of the aorta is reduced by 30%, find the average flow rate through the diseased aorta. What increase in blood pressure would be needed to obtain the normal flow rate? (Assume that Poiscuille's law applies.)

Explanation:

a. The pressure gradient would have to increase by a factor of 3.33.3.

b. The pressure gradient would have to increase by a factor of 1.41.4.

c. The pressure gradient would have to increase by a factor of 4.24.2.

d. The pressure gradient would have to increase by a factor of 123123.

e. The pressure gradient would have to increase by a factor of 22.

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia