Question

Atherosclerosis is a disease for which an artery is narrowed by plaque, leading to a reduced aperture over a length of less than 1 cm. For this, how many of the following statements are correct? Answer 0, 1, 2, 3, 4 or 5.

i) From a consideration of kinetic energy conservation only, Bernoulli's law can show that the blood pressure is unchanged between positions before and after the reduced aperture i.e., positions that contain no plaque.

ii) Poiseulle's law derives from an understanding that kinetic energy is lost to heat.

iii) If Reynold's number is greater than 200 in a tube, then the flow must be turbulent.

iv) Poiseulle's law applies for laminar flow only.

v) Bernoulli's law applies for horizontal tubes only.

Answer 1

i) From a consideration of kinetic energy conservation only, Bernoulli's law can show that the blood pressure is unchanged between positions before and after the reduced aperture i.e., positions that contain no plaque  True

ii) Poiseulle's law derives from an understanding that kinetic energy is lost to heat.

True

iii) If Reynold's number is greater than 200 in a tube, then the flow must be turbulent.​

False

iv) Poiseulle's law applies for laminar flow only.​

True

v) Bernoulli's law applies for horizontal tubes only.​

False

so only three statements are true

let me know in a comment if there is any problem or doubts​