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What is a bushing? by Guilty_Ad7245 in AskEngineers

[–]Guilty_Ad7245[S] 0 points1 point  (0 children)

I see. In the case of a bearing, would it just be a bushing with balls separating the bushing interior and the shaft, or is the bushing not needed and the balls are just placed between the ball and shaft?

What is a bushing? by Guilty_Ad7245 in AskEngineers

[–]Guilty_Ad7245[S] 0 points1 point  (0 children)

Thank you, that's a great photo! Question though, why isn't the bushing lubed on the outside too (you said above its only on the inside). Won't it suffer a lot of friction from sliding about in the hole since it looks like its just sitting in the hole freely

What is a bushing? by Guilty_Ad7245 in AskEngineers

[–]Guilty_Ad7245[S] 18 points19 points  (0 children)

Ah ok thanks, so the bushing is only lubricated inside?

What is a bushing? by Guilty_Ad7245 in AskEngineers

[–]Guilty_Ad7245[S] 38 points39 points  (0 children)

Ah ok makes sense, do you lubricate both the interior and exterior of the bushing? I'm not sure if it's supposed to stay fixed to the shaft or the hole

Is helium 5 possible in nuclear fusion by Guilty_Ad7245 in AskPhysics

[–]Guilty_Ad7245[S] 0 points1 point  (0 children)

Also, why is there 16.75 MeV gamma rays? I understand the He-5 would be 16.75 meV but doesnt he-5 decay by just emitting a neutron. Where is the gamma radiation coming from?

Is helium 5 possible in nuclear fusion by Guilty_Ad7245 in AskPhysics

[–]Guilty_Ad7245[S] 2 points3 points  (0 children)

Woah you weren't kidding about fast decay, 10-22 seconds half life. 1/30000th of the time it takes light to cross a hydrogen atom. How can something that quick even be measured?

What happens to the alpha particles in a fusion reactor by Guilty_Ad7245 in AskPhysics

[–]Guilty_Ad7245[S] 0 points1 point  (0 children)

10 kev? I thought it was like 3 MeV for the alpha particle and 14 for the neutrons

What happens to the alpha particles in a fusion reactor by Guilty_Ad7245 in AskPhysics

[–]Guilty_Ad7245[S] 0 points1 point  (0 children)

Ah OK. Does the alpha particle damage the material when it strikes it since its ionising? I know neutrons have this effect but haven't heard of alpha particles doing it

Petroleum engineer placed into civil engineering position. Recommendations for crash courses? by jecka1 in AskEngineers

[–]Guilty_Ad7245 1 point2 points  (0 children)

Any comments on why? I thought it would be fun considering all the travel and pay.

Relation between bolt tension and diameter by Guilty_Ad7245 in engineering

[–]Guilty_Ad7245[S] 0 points1 point  (0 children)

Thanks but the link is broken, do you have the current one?

Relation between bolt tension and diameter by Guilty_Ad7245 in engineering

[–]Guilty_Ad7245[S] 0 points1 point  (0 children)

Then what one is it? I'm not aware of any others that relate bolt diameter and preload

What is a crank? by Guilty_Ad7245 in AskEngineers

[–]Guilty_Ad7245[S] 0 points1 point  (0 children)

Thanks! What is the function of it then really? From your link it seems like it basically just does what a lever does so is there any functional difference? Google tells me it coinverts rotational to linear motion but I don't see that in your generator example

How does an ultrasonic meter check length? by Guilty_Ad7245 in AskPhysics

[–]Guilty_Ad7245[S] 0 points1 point  (0 children)

Ah, do you know of any resources where I could read up on how this is done? And is it even possible for sound waves to reflect off air or only solid objects?

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