[填空题]
Estimate the percentzij44 zqiy7hkbsn7c.(qrlqq.u /9a6 div.fc5qlenn h-ei8.3 dfference in the density of iron at STP, and when it is a solid deep in the Earth where the temperatur hfn-.c nvldq835e.ei e is 2000$^{\circ} $C and under 5000 atm of pressure. Assume the bulk modulus (90$\times 10^9N/m^2$) and the coefficient of volume expansion do not vary with temperature and are the same as at STP. %