The question is: Blood pressure of a healthy person is _ mm Hg
Correct answer: B. 120/80
- A. 140/60
- B. 120/80
- C. 80/120
- D. 90/60
Explanation
Blood pressure is measured in millimeters of mercury (mmHg) and is expressed as a ratio of systolic pressure (the pressure when the heart beats) over diastolic pressure (the pressure when the heart rests between beats). A healthy blood pressure reading is typically around 120/80 mmHg.
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Fluid flow is described through speed, pressure and density, including steady flow and the equation of continuity for conserving mass. Bernoulli's equation relates pressure, speed and height, while fluid drag and terminal velocity explain why a falling object eventually moves at constant speed when drag balances its weight.
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