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BP, cardiac arrest and Physics

Ashlin asks:

  1. HOW IS CARDIAC ARREST RELATED WITH PHSICS?
  2. WHAT IS THE PRINCIPLE OF SPHYGMOMANOMETER?

Devika asks:

Why the blood pressure in humans is greater at the feet than at the brain.

Problem from Kinematics

Devika posted:

There are two particles A and B moving with same velocity u such that initially there velocity are perpendicular to each other and distance between them is L.the velocity of A is always directed towards B.find the distance between them after a long time.

Ans will be posted soon

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