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hutchphd's latest activity
hutchphd
reacted to
PeroK's post
in the thread
I
I want a good reference to a discussion of the meaning of "the speed of light is constant"
with
Like
.
In GR, light moves on null worldlines, which means that the speed of light, as measured locally, is a universal invariant. Measured...
Yesterday, 3:24 PM
hutchphd
reacted to
haruspex's post
in the thread
Electric field external to Conducting Hollow Sphere with charge inside
with
Like
.
That's not how I read the thread. In post #3, @curious_mind clarified that the puzzlement concerned a zero thickness conducting shell...
Monday, 11:17 AM
hutchphd
reacted to
haruspex's post
in the thread
Electric field external to Conducting Hollow Sphere with charge inside
with
Like
.
No, the external field is different. The effect of the sphere is to make the point charge appear to be at the centre of the sphere.
Monday, 11:16 AM
hutchphd
reacted to
kuruman's post
in the thread
Electric field external to Conducting Hollow Sphere with charge inside
with
Like
.
I think that OP's question was adequately answered in post #2. In my opinion it lost its focus because of OP's whataboutism.
Monday, 11:15 AM
hutchphd
replied to the thread
Electric field external to Conducting Hollow Sphere with charge inside
.
I am very confused by much of this colloquy. Can the OP reference a particular section or equation in Griffiths, please? And I am...
Sunday, 8:42 PM
hutchphd
reacted to
haruspex's post
in the thread
A falling resistive disk in uniform magnetic field
with
Like
.
"perdipencular" That does deserve to be a word.
Sunday, 8:11 PM
hutchphd
reacted to
berkeman's post
in the thread
Are There Sci-Fi Movies Similar to Oppenheimer?
with
Like
.
Lordy. Thread is done. Please use Google searches for your future research on this topic.
Saturday, 8:26 PM
hutchphd
reacted to
phinds's post
in the thread
Are There Sci-Fi Movies Similar to Oppenheimer?
with
Like
.
Normally I use a small version of this image, but ...
Saturday, 8:22 PM
hutchphd
reacted to
BillTre's post
in the thread
Share Animal Pictures: For Animal Lovers
with
Like
.
Friday, 4:38 PM
hutchphd
reacted to
gmax137's post
in the thread
Find Out Who's Calling with a Truly Free Reverse Phone Lookup
with
Like
.
well, that was easy. Earlier today I foolishly searched the number using Bing; the hits were all pay to play. Thanks.
Friday, 10:59 AM
hutchphd
reacted to
Dr.D's post
in the thread
Film Advance system research for DIY Camera
with
Like
.
Why not simply advance the film one picture space repeatedly, and keep tension on the winding reel by a slipping drive?
Friday, 10:46 AM
hutchphd
reacted to
Astronuc's post
in the thread
Which year did Newton first work with calculus: 1664,1665 or 1666?
with
Informative
.
https://amsi.org.au/ESA_Senior_Years/SeniorTopic3/3b/3b_4history_1.html...
Friday, 10:29 AM
hutchphd
reacted to
JT Smith's post
in the thread
The one correct response to an insincere apology
with
Haha
.
Be honest. Tell them that not only do you not believe in their sincerity but that once the group at physicsforums comes up with one...
Thursday, 7:38 PM
hutchphd
reacted to
DaveE's post
in the thread
The one correct response to an insincere apology
with
Like
.
Just say "thank you" and be quiet. If they aren't ready to really apologize, they also aren't ready to argue about apologies. Address...
Thursday, 7:37 PM
hutchphd
reacted to
russ_watters's post
in the thread
Why do almost all rivers in the world flow North to South?
with
Like
.
While this got a laugh, the northern and southern hemispheres have different geographical biases; there's more land in the north, more...
Thursday, 7:27 PM
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