ch44_p3 - 3. Since the density of water is = 1000 kg/m3 = 1...

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3. Since the density of water is ρ = 1000 kg/m 3 = 1 kg/L, then the total mass of the pool is ν = 4.32 × 10 5 kg, where ν is the given volume. Now, the fraction of that mass made up by the protons is 10/18 (by counting the protons versus total nucleons in a water molecule). Consequently, if we ignore the effects of neutron decay (neutrons can beta decay into protons) in the interest of making an order-of-magnitude calculation, then the
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