Question for people
Nov. 16th, 2004 09:51 am![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
danceboyIs thermal mass equal to mass times a (units changing) constant? I.E. is the thermal mass of one 12 kg object equal to that of every other 12 kg object? I've asked a few people who I thought would know (chemical, civil, and mechanical engineers. No, I haven't been able to find a materials scientist.), and all of them said roughly "I think so. I mean, it sounds likely...."
Mind you I've forgotten why I cared in the first place, but care I do.
While we're on the subject of asking random questions; I don't understand what's going on with titanium in hammers and other impact tools (e.g. golf clubs).
I'm guessing that it's just marketing, but they're claiming that a similar sized Ti head will hit harder and be less work to swing. I believe that second part. I even believe that due to KE = 1/2mv^2 a titanium head will have more KE, but I think that inertia is the important thing here (by extrapolation to a dowel with a band of steel wrapped around the end to prevent splitting).
I can also see an advantage to a hammer that doesn't rust, and that doesn't get dinged up if you toss it into your tool box. Further, I think that giving Russia money right now is not a bad thing. I just don't really see a direct advantage for the hand holding the hammer.
Ideas? Comments?
Mind you I've forgotten why I cared in the first place, but care I do.
While we're on the subject of asking random questions; I don't understand what's going on with titanium in hammers and other impact tools (e.g. golf clubs).
I'm guessing that it's just marketing, but they're claiming that a similar sized Ti head will hit harder and be less work to swing. I believe that second part. I even believe that due to KE = 1/2mv^2 a titanium head will have more KE, but I think that inertia is the important thing here (by extrapolation to a dowel with a band of steel wrapped around the end to prevent splitting).
I can also see an advantage to a hammer that doesn't rust, and that doesn't get dinged up if you toss it into your tool box. Further, I think that giving Russia money right now is not a bad thing. I just don't really see a direct advantage for the hand holding the hammer.
Ideas? Comments?
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no subject
Date: 2004-11-17 10:39 pm (UTC)Answer 2, hmm, interesting. I was using much the same analogy at one point, but I didn't think about vibration, just initial deformation, and I know that Ti deforms more than steel on impact so I figured that that would make it worse. That said, I've read that Ti doesn't vibrate as much. It sounds like (and makes sense that) both types of hardness matter to delivering impact.
And it sounds like testing this would be much easier with hammers as spin is gone, angle/technique is easy, and "hardness of thing getting hit" is higher....
As for the studies from the USGA, I remember the FIE (Federation Internationale d'Escrime) using the phrase "kilograms of force" in their rules, and ever after I've tried very hard to ignore sporting organizations using scientific jargon.
Hmm, this means that using Ti for crowbars actually makes a lot of sense as one of the annoying things is that it hurts to hold a crowbar when you hit it with a hammer to get it under a nail.
Thank you very much.