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What is heavier. A kilogram of platinum or a kilogram of electricity
Nov 21, 2018 18:47:09 #
Dannj wrote:
And with all due respect most kids won’t care. Personally, I’d rather deal with a kid who can make the right change for me.😊
Nov 21, 2018 18:58:11 #
DonB wrote:
Before all the reply's progressed to Americas "Education" System, did anyone notice that the Kibble Balance uses a 1 kilo weight to balance the power of the electron? EMF will vary according to frequency, size of windings in the coil etc. Wonder if the all those variables are spelled out and, what standard is used there?
BTW DonB....that would be a 1 kilogram mass...not weight. <big grin>
Nov 21, 2018 19:32:19 #
There is another part of the joke in addition to the fact that electricity weighs nothing. A Kilogram of anything will still be a kilogram, neither weighs differently. Trick question no matter what is measured.
Nov 21, 2018 19:39:24 #
hassighedgehog wrote:
There is another part of the joke in addition to the fact that electricity weighs nothing. A Kilogram of anything will still be a kilogram, neither weighs differently. Trick question no matter what is measured.
Yes, hassighedgehog. A Kilogram is a unit of mass, not force. The approximate weight of a Kilogram is the Newton (under standard conditions). And, electrons do have mass...although very tremendously small.
Nov 23, 2018 21:33:37 #
Largobob wrote:
I agree, Dannj. But, "making the right chan... (show quote)
I understand electives versus required courses and I agree with your conclusion, to a point. Maybe it comes down to how we define “success.” I don’t think that those “who choose to take physics” are the only ones who “operate on a fairly high cognitive level...with advanced math skills”. Nor are they the only ones who “actually do care”. Your comment implies that, generally, those who choose to study Physics will “not end up ......... running a checkout register”.
Nov 24, 2018 07:04:48 #
Dannj wrote:
I understand electives versus required courses and I agree with your conclusion, to a point. Maybe it comes down to how we define “success.” I don’t think that those “who choose to take physics” are the only ones who “operate on a fairly high cognitive level...with advanced math skills”. Nor are they the only ones who “actually do care”. Your comment implies that, generally, those who choose to study Physics will “not end up ......... running a checkout register”.
Sorry, Dannj, if I implied that. There are many, many talented and successful people who did not take physics. We are each born with different talents, aptitudes and traits. I personally have ZERO aptitude for art, athletics, or world languages. I am talented at music, science and mathematics.....thus my bias. And yes....there are many students who don't take physics who operate on a high cognitive level.
I guess we arrived at this conversation starting back from the comment that today's students would likely not "get" this new definition of the Kilogram. Since SI base units and the resulting derived units GENERALLY fall within the realm of physics...that's why my comments went that way.
Dec 1, 2018 10:37:52 #
SteveR wrote:
I'm at Palo Duro Canyon today. Must be the echo affect.
Or the Doppler effect!
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