jbriggs444's latest activity
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jbriggs444 replied to the thread Reconcile poundforce w/slug and lbmass.By the time I went to high school seven or eight years later the science classes were teaching nothing but MKS (or cgs). Like @Mister T... -
jbriggs444 reacted to Herman Trivilino's post in the thread Reconcile poundforce w/slug and lbmass with
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No. There is no officially-sanctioned definition of the pound-force. The definition of the pound Avoirdupois is 0.453 592 37 kg. The... -
jbriggs444 replied to the thread B Conservation of kinetic energy in expanding space.One can define the kinetic energy associated with peculiar movement relative to a co-moving coordinate system. In an expanding universe...
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jbriggs444 reacted to Bandersnatch's post in the thread B Conservation of kinetic energy in expanding space with Like.
As I see it, the poster is asking about an effect opposite to objects in expanding space asymptotically joining the Hubble flow over...
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jbriggs444 replied to the thread Reconcile poundforce w/slug and lbmass.I love it when a discussion ends in agreement. One reason that many of us prefer to work with SI (the metric system) is to avoid unit...
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Thank you. I had completely forgot about this constant. I have thermo txt enroute which will supply plenty problems of lb steam into...
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jbriggs444 replied to the thread Reconcile poundforce w/slug and lbmass.As I pointed out in your other thread, the correct formula for systems of units that are not coherent is ##F=kma## where k is a unit...
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jbriggs444 replied to the thread B Interstellar asteroids.For a transit that follows the rotational axis of the two star system, there is no possibility of a slingshot. We are told that this is...
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jbriggs444 replied to the thread Definition of pound force.The direct answer is that I know of no picture or video demonstrating a 32 pound weight being accelerated at 1 foot per second per...
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jbriggs444 replied to the thread Definition of pound force.Are you trying to convince yourself? Or a third party doubter? How direct does the proof need to be?
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jbriggs444 replied to the thread B Interstellar asteroids.Ahhh, my mistake. I visualized all motion in the plane of the page. Your way restores the symmetry.
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For a given velocity magnitude, there can be up to two angles to hit a target. This was used in naval warfare to land 2 full salvos...
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jbriggs444 replied to the thread B Interstellar asteroids.We are given initial speed and position. We can assume a perfect circular orbit of the stars about each other. A quick look at the...
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jbriggs444 replied to the thread B Work done when moving an object.It is hard to understand exactly what you are talking about here. It sounds like you have a particular destination point in mind. A...
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Objects "experiencing gravity", whether in freefall or not, is not part of the theory of general relativity; it's a misunderstanding...