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There are many radiometric clocks and when applied to appropriate materials, the dating can be very accurate.As one example, the first minerals to crystallize (condense) from the hot cloud of gasses that surrounded the Sun as it first became a star have been dated to 4568 plus or minus 2 million years....!! Other events on earth can be dated equally well given the right minerals.A bit in the other, the rate of fusion drops and the Sun collapses.

Further evidence comes from the complete agreement between radiometric dates and other dating methods such as counting tree rings or glacier ice core layers.For example, a problem I have worked on involving the eruption of a volcano at what is now Naples, Italy, occurred 38500 years ago with a plus or minus of 300 years.So, when the materials are appropriate and one carefully avoids contamination and re setting radiometric clocks can be VERY ACCURATE.According to what I've heard, the rock's "internal clock" has now reset, which implies that its radiometric abundances are the same as when it first formed.This doesn't make sense: if, over its 1 Gyr lifetime, it lost 99% of isotope A, it won't suddenly get the original abundances of that isotope back through the process of melting and freezing.




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The Poor and the Rich In its 2000 survey of family income and expenditure, the NSO said that the average income of the population's 10th decile, representing the richest 10 percent of the Filipinos, was 14 times higher than the average earnings of the first decile, representing the poorest 10 percent.


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A huge number of charming girls and incendiary guys spend their free time on social networks and video chat, make new online acquaintance, which often have a continuation in the real world.