It's 4 O:clock and all's weld.

[vicegrip]

4 AM that is.
:)
My watch is over.
next
vg

[moya034]

It's 4AM... do you know where your welding machine is?

[vicegrip]

does the minute-hand on a clock
pass over the hour-hand, in a 24 hour day?
A, 24
B, 22
C, 23.5
D, none of the above:D

Why did they build covered bridges,
On open roads?

We park in the drive-way and drive on the park-way.
Wonder what that's like for an English learner?

VG

O.T. ?
not quite,
At work: A weld-shop that has grown from 35 to 124 employees
in three years, we have lot's of little Asian welders and several
Mexican welders.
Comunication some days is an interchange of facial contortions
& allot of subtle and intence body-language.

[usmcpop]

22. That's all folks!

http://www.hobartwelders.com/weldtalk/attachment.php?attachmentid=27375&stc=1&d=1225027999

[vicegrip]

22. That's all folks!


Did you deduce that, or prove it out with Mickey Like I had to do.:D;)

vg

[usmcpop]

Well, sorta. ;)

I got more intrigued about exactly what time the hands pass over each other at every hour of the day...

Sorta like this:

"After it happens at 12:00, the next occurrence is not at exactly 1:05, but a short bit afterward, because the hour hand moves 1/12 of the way from 1 to 2 in the time that the minute hand moves from 12 to 1. Each hour, the amount of this error increases, until we find that for the meeting of hands at "11:00", the hour hand has moved all the way to 12:00 before the minute hand catches up. As a result, there are 11 such meetings in a 12 hour period, or 22 in a day.

The exact angles of the hands (in degrees, starting with 0 at 12:00 and going clockwise) are given by these equations, where H is the hour of the day (0 for 12), and M is the minutes into that hour, including fractions:

hour angle = 30 H + M/2
minute angle = 6 M

We want combinations of H and M that make these two angles equal. That is,

30 H = 5.5 M, or

M = 60/11 H

So, we have solutions at 0:0 (12:00), 1:05 5/11 (that is, 5/11 minute after 1:05:00), 2:10 10/11, 3:16 4/11, 4:21 9/11, 5:27 3/11, 6:32 8/11, 7:38 2/11, 8:43 7/11, 9:49 1/11, and 10:54 6/11. "

--------------------------------- ----------

Then I started thinking:

Today’s yesterday is the day before yesterday’s tomorrow.
Today’s tomorrow is the day before yesterday’s day after the day after tomorrow
Yesterday’s tomorrow is the day after tomorrow’s day before yesterday.

[vicegrip]

Well, sorta. ;)

I got more intrigued about exactly what time the hands pass over each other at every hour of the day...

Sorta like this:


So, we have solutions at 0:0 (12:00), 1:05 5/11 (that is, 5/11 minute after 1:05:00), 2:10 10/11, 3:16 4/11, 4:21 9/11, 5:27 3/11, 6:32 8/11, 7:38 2/11, 8:43 7/11, 9:49 1/11, and 10:54 6/11. "

--------------------------------- ----------

.
I had guessed agout the same, but too lazy to extrapolate it......
after all "It's Sunday"!

Now ........
Covered bridges ? WHY ?
Don't tell me so they could sit-out a rain-storm.:p

vg

[usmcpop]

I meant to address the covered bridges. Back in the day, there were no "lover's lanes", so they needed to duck in somewhere out of sight for a quick "picker-upper", LOL.

Actually, wooden bridges would rot easily in the days before preservatives. At least that's how I heard it. Keep 'em high and dry.

[enlpck]

That was a big part, as was the difficulty of clearing a bridge deck prior to the modern era (snow, ice, whatever), and the bridge often collected a lot more than the road leading to it, as the roads tended to have some cover. Protection from wind was likely also a selling point.

[Hotfoot]

Hey, USMC, did you happen to notice that, on your watch picture, Mickey's thumb is on the wrong side of his right hand?? You should have used his other watch... "Mickey Mouse Welder" (a class that may well include me!):p

http://i35.tinypic.com/2ikv80g.jpg

[Pumpkinhead]

the answer to the hour/minute hand question is D (none of the above), the hand passes over 21 times per day cycle, for it to pass over 22x you are into the next cycle. Yeah, it's all in the details.

[usmcpop]

Punkin', you might be kinda be right there, depending on the watch. The hour hand isn't yet to midnight when the minute hand gets to it after 24 hours. Maybe they both advance together at the last second and the minute hand doesn't suck the hour hand up to 12:00. Got yer point.

Math is boring. Micky says "Let's go weld, folks".

P.S. Had time bandits in over the weekend. Two cheap battery-powered clocks went an hour off, even after I replaced the battery in one :confused:. Then the PC showed a meeting time in Outlook an hour off normal, which somehow magically corrected itself to the right time somewhat later. :( Time has not been my friend the last few days.

[Pumpkinhead]

P.S. Had time bandits in over the weekend. Two cheap battery-powered clocks went an hour off, even after I replaced the battery in one :confused:. Then the PC showed a meeting time in Outlook an hour off normal, which somehow magically corrected itself to the right time somewhat later. :( Time has not been my friend the last few days.

yep, that time bandit is the PTB, we were supposed to change time last weekend, but they didn't bother to tell the machinery. that's why one day robots will take over.

[usmcpop]

yep, that time bandit is the PTB, we were supposed to change time last weekend, but they didn't bother to tell the machinery. that's why one day robots will take over.

I'm used to Microsoft stuff telling me what it is I think I want to do (NOT!), but a couple of $2. Chinese wall clock movements? BAH! Next thing you know, my AK clones and the SKS rifles will be adjusting the aiming point for me. :mad:

[Pumpkinhead]

Punkin', you might be kinda be right there, depending on the watch. The hour hand isn't yet to midnight when the minute hand gets to it after 24 hours. Maybe they both advance together at the last second and the minute hand doesn't suck the hour hand up to 12:00. Got yer point.


it turns out i am only kinda right, it only passes over 21x at 23 specific start points (00:00, 01:05:27, 02:10:55, etc.) if the start point is at any other time it passes 22x.

[whateg0]

Uh, doesn't the minute hand have to pass over the hour hand between the 2 sets of 10? So, then 10 times between midnight and noon, plus the occurrance at noon, and then 10 times between noon and midnight makes 21. This, like the previous examples does not include midnight, as the minute hand only meets, not passes over the hour hand.

Now, Phil asked about this in a 24-hour day, but did not specify the start and stop times. If the start and stop time is, say, 12:04, then the minute hand would pass by the hour hand one more time, making the total 22.

Correct me if I'm wrong.

edit: just saw punkindude's reply. sorry.

Dave

[vicegrip]

Well another night, come'n home, 38 miles.......
involving 5 counties, 3 1/2 decades,

die-hard 2nd-shifter, I saw 4 sun-dogs One Siberian Ice-ball.
An owl with a 5 foot wing-span.

But no Greys, no Lizard-people. No little thin guys with heart-shaped heads.

I did "feel" the location of my childhood stomping ground once,
and I didn't know I was 400 yards away from it.

But no-ET's trying to read my mind.

That's 498,000 acres 172,000 hours,
We are the only ones.;)

Vg

[Aeroweld]

Next thing you know, my AK clones and the SKS rifles will be adjusting the aiming point for me. :mad:

That is a given Pop...."Change" is coming.....they will be aimed at the furnace after the new Prez takes office.