(b) Bulk modulus $K = \frac{\mathrm{\Delta}p}{\mathrm{\Delta}V}V$ $\mathrm{\Delta}p = \frac{K\mathrm{\Delta}V}{V}$ $\mathrm{\Delta}p = \frac{2100 \times 10^{6} \times 0.008}{200} = 84\ kPa$
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Ph.D. in Physics with 19+ years of teaching experience.