Question

Harriet is told by her doctor that her heart rate is 70.0 beats per minute. If Harriet's average blood flow in the aorta during systole is 1.5*10^ -2 m/s , what is the wavelength of the waves of blood in Harriet's aorta, created by her beating heart?

Answer 1

Answer:

12.9 mm

Explanation:

From v = fλ where v = speed of wave = blood flow rate = 1.5 × 10⁻² m/s and f = frequency of wave = heart rate = 70 beats per minute = 70/60 beats per second and λ = wavelength of waves in Harriet's aorta.

λ = v/f = 1.5 × 10⁻² m/s ÷ 70/60 beats per second

  = 6 × 1.5 × 10⁻²/7  

  = 1.29 × 10⁻² m

  = 12.9 mm