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jrmichler's latest activity
J
jrmichler
replied to the thread
I
Looking for a formula for damage when sliding to a stop
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Having done face plants both on concrete while running, and on ice while ice skating*, I can understand your question. Here's my...
Yesterday, 8:40 AM
J
jrmichler
replied to the thread
Characteristic system curve for a two branch system
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We need a system diagram and fluid information to even begin to help you. Fluid information includes density, viscosity, and...
Wednesday, 3:32 PM
J
jrmichler
reacted to
bogue's post
in the thread
Inductive Heating of a Non-Conductive Reactor's Contents
with
Like
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Oh, of course - I’ve been treating this as a conversation with experts and less of a public thread. Safety is important. My apologizes...
Wednesday, 8:40 AM
J
jrmichler
replied to the thread
Manually charging batteries
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Yes, you can use an adjustable power supply to charge batteries. You need to study up on the proper voltages and currents. I have done...
Tuesday, 8:17 PM
J
jrmichler
replied to the thread
I
Interseasonal heat storage / sand battery insulation?
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A nice article on seasonal heat energy storage that is actually being built...
Monday, 11:32 AM
J
jrmichler
reacted to
Borek's post
in the thread
Electromagnetic field vs electromagnetic wave "radiation"
with
Like
.
In my drawer "possibly carcinogenic" lies next to "we have no idea but we won't say 'safe' to avoid being sued".
Sunday, 3:23 PM
J
jrmichler
replied to the thread
How much will my seaweed tanks heat up in the hot Indian summer?
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What is the ambient temperature at which the water temperature is 30 C? The difference between that temperature and 38 C is...
Sunday, 9:19 AM
J
jrmichler
replied to the thread
Why and by how much does unbalanced current flow increase EM radation?
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SHEESH, more fearmongering. A search using search term causes of cancer quickly finds the following: World Health Organization...
Apr 12, 2024
J
jrmichler
replied to the thread
What were you doing at 16?
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HMMM, let's see if I can remember that far back... Climbed and painted some obnoxious messages on the water tower. Hitchhiked for the...
Apr 10, 2024
J
jrmichler
replied to the thread
Sound of a hypersonic projectile from a rail gun
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Nothing so exciting, I was just pulling targets at a 600 yard rifle match. But there was the time that some idiots thought that...
Apr 8, 2024
J
jrmichler
replied to the thread
Sound of a hypersonic projectile from a rail gun
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A supersonic jet a few miles up makes a dull BOOM, while a 30 caliber bullet at about Mach 2 to 2.5 a few feet overhead makes a SNAP. I...
Apr 8, 2024
J
jrmichler
replied to the thread
I
Interseasonal heat storage / sand battery insulation?
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I did not check your analysis, but your calculations seem right. I have done similar calculations with different assumptions. My...
Apr 7, 2024
J
jrmichler
replied to the thread
Simscape mechanics: angular acceleration not working
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After a PM discussion with the OP, the thread will stay closed.
Apr 6, 2024
J
jrmichler
replied to the thread
How to level SS 304 sheet metal after perforation?
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In addition to the previous posts, look at the sharpness of the punch and die, and the clearance between the punch and die. The figure...
Apr 6, 2024
J
jrmichler
reacted to
Baluncore's post
in the thread
How to level SS 304 sheet metal after perforation?
with
Like
.
If the sheet is not flat after punching, it will form a cone, or a saddle. It seems you have an overlap near the circumference, so you...
Apr 6, 2024
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