Question

The heart takes and discharges 7500 l of blood in a day. Density of blood = 1.05 × 10³ kg m^-3. If on an average it takes to a height of 1.6 m. Find the power of the heart pump.

• A. 1.63 W
• B. 1.36 W
• C. 1.96 W
• D. 2.46 W

Answer 1

Answer: (A)

1.63 W

Answer 2

P = $\frac{dm}{dt}gh = \rho\frac{dV}{dt}gh$

P = $\frac{1.05 \times 10^{3} \times 7500 \times 10^{- 3}}{24 \times 60 \times 60} \times 10 \times 1.6 = 1.63W$