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8 February, 09:26

The head of a giraffe is 2.0 m above its heart and the density of the blood is 1.05 103 kg/m3. what is the difference in pressure between the giraffe's heart and head? (fortunately, a giraffe's neck has a special circulatory system to adapt to this neck length, producing an even flow of blood to the head.)

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  1. 8 February, 09:31
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    The giraffe head is higher than its heart so the blood pressure in the head must be lower than in the heart. The pressure is directly related to the density, gravity, and the height. The calculation would be:

    P = ρ*g*h

    P = 1.05 * 10^3 kg/m3 * 9.8m/s2 * 2m = 20 580 pascals = 20.58 kpa
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