Question

Convert normal blood pressure readings of 120 over 80 mm Hg to newtons per meter squared using the relationship for pressure due to the weight of a fluid (P = hρg) rather than a conversion factor. (b) Discuss why blood pressures for an infant could be smaller than those for an adult. Specifically, consider the smaller height to which blood must be pumped.

Answer 1

Answer:

human body lies between 15989 N/m² to  10659 N/m²

height of the infants are small

Explanation:

normal blood pressure readings of 120 over 80 mm Hg

density of mercury = 13596 kg/m³

P₁ = ρ g h₁  = 13596 × 9.8 × 0.12 = 15989 N/m²

P₂  = ρ g h₂ =  13596 × 9.8 × 0.08 = 10659 N/m²

hence the blood pressure in the human body lies between 15989 N/m² to  10659 N/m².

b) infant has low pressure than the adult because the height of the infants are small so pressure is directly proportional to height more the height more will be the pressure.