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Spinnor's latest activity
Spinnor
reacted to
Meir Achuz's post
in the thread
I
"Strange contradiction" that Maxwell found and resolved
with
Like
.
The equation, $$\nabla\times{\bf H}=4\pi{\bf j}/c$$, contradicts the continuity equation because, $$\nabla\cdot(\nabla\times{\bf...
Sunday, 5:52 PM
Spinnor
reacted to
hutchphd's post
in the thread
I
Why is the emissivity of metals low?
with
Like
.
A black body both absorbs and emits radiation. In fact for any wavelength light the emissivity and absorbtivity are exactly equal (this...
Apr 7, 2024
Spinnor
replied to the thread
I
Radiation from solid black bodies
.
Most real bodies are not black bodies. See this thread, Getting the emissivity from scratch ...
Apr 7, 2024
Spinnor
replied to the thread
Airbnb eclipse bookings illustrate the path of totality
.
The black disc looks to be near Raleigh N.C. and a Google search "what is going on in raleigh north carolina this weekend" came up with...
Apr 6, 2024
Spinnor
posted the thread
Airbnb eclipse bookings illustrate the path of totality
in
General Discussion
.
From, https://www.axios.com/2024/04/05/airbnb-bookings-eclipse-april-8-map
Apr 5, 2024
Spinnor
reacted to
Ibix's post
in the thread
B
TV Series: 3 Body Problem - affects gravitational force?
with
Like
.
It's actually the tidal gravity that matters - the difference between the solar contribution to gravitational acceleration at the...
Mar 31, 2024
Spinnor
replied to the thread
I
Nelson's Stochastic Mechanics, simple argument why interference exists?
.
I took a quick look and wonder if and how the papers you linked would explain the simple quantum problem of a particle in a 1-D box...
Mar 30, 2024
Spinnor
reacted to
jrmichler's post
in the thread
B
Putting a wet phone in rice vs. leaving it in an open space
with
Like
.
Similarly, the recommendation for wet running shoes was to stuff them with newspapers to absorb the water. So I ran some tests...
Feb 20, 2024
Spinnor
reacted to
A.T.'s post
in the thread
B
Putting a wet phone in rice vs. leaving it in an open space
with
Like
.
There are many recommendations. One is to rinse it with isopropanol to flush out the water and the stuff that was floating/resolved in...
Feb 20, 2024
Spinnor
reacted to
jrmichler's post
in the thread
Misc.
DIY RC Boat with Parallel Impeller
with
Like
.
Your idea is similar to a type of air blower known as a cross flow blower. These blowers are used in applications where low profile and...
Feb 10, 2024
Spinnor
reacted to
Lnewqban's post
in the thread
Misc.
DIY RC Boat with Parallel Impeller
with
Like
.
Welcome! :cool: My humble opinion: In theory, that is supposed to be working as an in-line pump. When the casing gets full of water...
Feb 10, 2024
Spinnor
reacted to
sophiecentaur's post
in the thread
I
Can a single photon of a single frequency pass through a FP cavity?
with
Like
.
Correct. But any source has a bandwidth; a distribution of photon frequencies about a mean value. As has been established, the source is...
Feb 9, 2024
Spinnor
replied to the thread
Construction
Attaching a Lean-To Porch to the side of a House
.
All the work should be able to be done outside of the house. If you were lucky enough to shoot for the rim joist that is a large target...
Feb 5, 2024
Spinnor
replied to the thread
Construction
Attaching a Lean-To Porch to the side of a House
.
You only should need max 1/2 inch holes which a hammer drill will do effortlessly through brick. If you look at the link I included...
Feb 5, 2024
Spinnor
replied to the thread
Construction
Attaching a Lean-To Porch to the side of a House
.
I built a porch roof similar to your specs. I was able to tie in the house side directly to the end of the existing roof. 2x6 roof...
Feb 5, 2024
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