TSny's latest activity
-
TSny reacted to Vincf's post in the thread Paradox in Induced Dipole Forces: Does it violate Newton's Third Law? with
Like.
Your mistake comes from differentiating the dipole moment as well, whereas it must be kept constant during the differentiation. To... -
TSny reacted to Russ Edmonds's post in the thread Undergrad Simulated motion of an oblate and prolate spinning spheroid with
Love.
Equations of motion for a spinning spheroid [1] where implemented in a Blender Python script. 1. H. K. Moffatt, Y. Shimomura and M... -
TSny replied to the thread Newton's laws homework: inclined plane with pulley.Yes, good. That's what I get. If @akapm90 is OK with this argument, then they can proceed onward and ignore post #5. Very good point...
-
TSny replied to the thread Newton's laws homework: inclined plane with pulley.@Steve4Physics: Your post made me think of an easier way to see how ##a_y## is related to ##A_x## and ##A_y##. Imagine that the block...
-
TSny replied to the thread Newton's laws homework: inclined plane with pulley.I'm not seeing this. If ##\alpha = 0##, so the upper section of the string remains horizontal, then ##a_y = -A_x##. But this is not...
-
TSny replied to the thread Newton's laws homework: inclined plane with pulley.Even though it starts at rest, we can still consider the configuration after the block has moved some distance. Of course, the block...
-
TSny replied to the thread Newton's laws homework: inclined plane with pulley.The pulley moves with the block ##M##. If the block moves a distance ##S## up the slope, then the pulley moves parallel to the slope...
-
-
TSny replied to the thread Newton's laws homework: inclined plane with pulley.OK. I see now that you already brought up this ambiguity in your first post. Thanks.
-
TSny replied to the thread Newton's laws homework: inclined plane with pulley.I'm wondering if the question is asking for the acceleration ##a## and tension ##T## as functions of time, or if it is asking only for...
-
This is only part of the picture. First, in order to apply length contraction to the Earth-star distance, as you are doing, we have to...
-
TSny reacted to flyusx's post in the thread Calculating Dipole Moment In 3s To 2p Hydrogen Transition with Like.
I see that I did make a typo, for which I listed the radial integral as having the value of its square. I've reworked it from scratch...
-
TSny replied to the thread Calculating Dipole Moment In 3s To 2p Hydrogen Transition.I think this might be part of the problem: In calculating the transition rate, you should include a sum over the final polarization...
-
TSny replied to the thread Calculating Dipole Moment In 3s To 2p Hydrogen Transition.Sounds right to me.
-
BTW thanks for the link to Wolfram - I tried it with numbers of four significant figures and it worked.
-
TSny replied to the thread Some work on MTW Figure 25.7.I think 1.86 is good. Using simple numerical differentiation, similar to your approach, I get 1.83. The approximate formula ##\frac...
