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?

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

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speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.