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The kilogram isn't a constant, just a standard measure. It's exactly the same as measuring distance; you can do it in feet & inches, miles, nautical miles, metres or kilometres.They're all just different sized units to measure with. The reason that the kilogram has become a 'standard' is that it's decimal based, which makes it easy for us to do maths with, and that its size works nicely with the other SI units. For example, if 1kg of flour costs 1$, then one tenth of a kg of flour would cost $0.1, but if you used the old UKP Sterling and 2lb of flour cost £1 then one tenth of 2lb is 3 ounces, 87.5 grains, and it would cost you two shillings, or 24 pence.

From Google;5 pounds = 2.26796185 kilogramsIt doesn't matter that it's uranium or what."15 pounds of U 235 is equal to 7 Kilograms of mass"No it isn't." But using the old weight of a Kilogram "Weight of a kilogram where; on earth, on the moon, "in zero" gravity?

Quote from: Bored chemist on 20/01/2010 19:02:36From Google;5 pounds = 2.26796185 kilogramsIt doesn't matter that it's uranium or what."15 pounds of U 235 is equal to 7 Kilograms of mass"No it isn't. OK, I looked it up and 15 pounds is equal to 6.80388 kilograms. I guess that the reference that gave me 7 pounds rounded off the figure. Thanks for your comments. Joe L. Ogan" But using the old weight of a Kilogram "Weight of a kilogram where; on earth, on the moon, "in zero" gravity?The kilogram that is used to measure all kilograms is losing weight and scientists are concerned as the Kilogram is used in so many different measures in Scientific endeavors. They believe it is losing weight because it is cleaned and they think that rubbing it is causing it to lose weight. Thanks for comments. Joe L. Ogan

From Google;5 pounds = 2.26796185 kilogramsIt doesn't matter that it's uranium or what."15 pounds of U 235 is equal to 7 Kilograms of mass"No it isn't. OK, I looked it up and 15 pounds is equal to 6.80388 kilograms. I guess that the reference that gave me 7 pounds rounded off the figure. Thanks for your comments. Joe L. Ogan" But using the old weight of a Kilogram "Weight of a kilogram where; on earth, on the moon, "in zero" gravity?