What is the power of a heart that pumps 50 cm³ of blood per beat at a pressure of 10 kPa at 72 heartbeats per minute?

Type: MCQ • Marks: 1

A. 60 W

B. 0.06 W

C. 6 W

D. 0.6 W

Explanation

Power = Pressure × Volume rate = 10,000 Pa × (50 × 10⁻⁶ m³ × 72 / 60 s) = 10,000 × (60 × 10⁻⁶) = 0.6 W.

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Class 9th Science (MCQ)

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