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Anyone fancy pub lunch and Iffley/Brookes?
Tor
10:54 AM, 25/01/15
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Going to climb a small rock somewhere tmo (sun). Either Dorset, forest, southern sand etc. Let me know if anyone keen. Markrtomlinson hotmail.com
 

2:39 PM, 24/01/15
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Will be at Brookes from 2pm today. Then we're going to do some food and drinks in Carterton. Drop us a line if you want to join us...
Steve
9:30 AM, 24/01/15
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Now, that's what I call civilized!
Niall H.
10:32 PM, 23/01/15
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""Clare and I are going to visit Sesh and Iza in Finland for a week on 11th March Grinning Grinning Definitely won't be warm...." -- Jenny

Also definitely won't be climbing! We'll be making the most of slight undulations for cross-country skiing purposes.
" -- Clare


There's some city-centre ice climbing in Helsinki if you want!
Fred
10:13 PM, 23/01/15
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"Clare and I are going to visit Sesh and Iza in Finland for a week on 11th March Grinning Grinning Definitely won't be warm...." -- Jenny

Also definitely won't be climbing! We'll be making the most of slight undulations for cross-country skiing purposes.

Clare
6:49 PM, 23/01/15
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"I've copied you in to the meet email - we'll probably be going to Stanage or Burbage" -- Mark C

Thanks, I'll see what time I manage to get up
Aileen
6:19 PM, 23/01/15
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"Surely lakes is doable without driving all night? Or is this just for a day trip?" -- Robert

Yeah, day trip - not massively feasible I'll admit...
Mark C
3:06 PM, 23/01/15
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"Who's going on the mystery trip? If its in the peak I might consider driving over if I wake up in time." -- Aileen

I've copied you in to the meet email - we'll probably be going to Stanage or Burbage
Mark C
3:02 PM, 23/01/15
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Surely lakes is doable without driving all night? Or is this just for a day trip?
Robert
2:52 PM, 23/01/15
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the world just isn't ready for Tim Crothers on speed
Yike! That is very true!
Niall H.
2:43 PM, 23/01/15
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""Well I wanted to go and do winter routes in the Lakes, but apparently driving all night on a diet of amphetamines is 'unsafe'..." -- Mark C

I had a similar response when suggesting driving through the night to get to glencoe for a weekend trip - some people just have no sense of adventure. Happy

Who's going on the mystery trip? If its in the peak I might consider driving over if I wake up in time." -- Aileen


Nonensense, I have such a highly-developed sense of adventure that I find all climbing actutely adventurous.
Mark
2:40 PM, 23/01/15
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""If you can only do sat, you're welcome to borrow my pads for sat, but you'd have to come and get them from Donnington bridge area. " -- Mark
Thanks that's very kind- I can in principle do Sunday as well. I would ideally be back 7-8ish (with it being dark early that shouldn't be too much of a problem). Car hire might be a bit more tricky though as the one near me isn't open sensible hours on Sunday so it doubles the cost having to pick up the night before...
" -- Tor


Well i'll possibly have my own car by then and can drive, but its by no means a safe bet at all!
Mark
2:38 PM, 23/01/15
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"Well, don't take the speed until everyone else has fallen asleep - then they'll not have to worry..." -- Niall H.

The problem is that it wouldn't be me driving... and the world just isn't ready for Tim Crothers on speed.
Mark C
2:37 PM, 23/01/15
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"Well I wanted to go and do winter routes in the Lakes, but apparently driving all night on a diet of amphetamines is 'unsafe'..." -- Mark C

I had a similar response when suggesting driving through the night to get to glencoe for a weekend trip - some people just have no sense of adventure. Happy

Who's going on the mystery trip? If its in the peak I might consider driving over if I wake up in time.
Aileen
2:35 PM, 23/01/15
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"If you can only do sat, you're welcome to borrow my pads for sat, but you'd have to come and get them from Donnington bridge area. " -- Mark
Thanks that's very kind- I can in principle do Sunday as well. I would ideally be back 7-8ish (with it being dark early that shouldn't be too much of a problem). Car hire might be a bit more tricky though as the one near me isn't open sensible hours on Sunday so it doubles the cost having to pick up the night before...

Tor
2:12 PM, 23/01/15
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driving all night on a diet of amphetamines is 'unsafe'
Well, don't take the speed until everyone else has fallen asleep - then they'll not have to worry...
Niall H.
2:09 PM, 23/01/15
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""THere's something very disappointing about a 'mystery' climbing destination, which turns out to be stanage plantation." -- Mark

Well I wanted to go and do winter routes in the Lakes, but apparently driving all night on a diet of amphetamines is 'unsafe'..." -- Mark C


Though there is something very mysterious to me about why people want to do that sort of thing at all..!
Mark
2:06 PM, 23/01/15
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If you can only do sat, you're welcome to borrow my pads for sat, but you'd have to come and get them from Donnington bridge area.
Mark
2:05 PM, 23/01/15
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"THere's something very disappointing about a 'mystery' climbing destination, which turns out to be stanage plantation." -- Mark

Well I wanted to go and do winter routes in the Lakes, but apparently driving all night on a diet of amphetamines is 'unsafe'...
Mark C
2:05 PM, 23/01/15
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I've got pads, and would happily go dorset/forest/even shitstone blocs.
Mark
2:04 PM, 23/01/15
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""There's something very disappointing about a 'mystery' climbing destination, which turns out to be stanage plantation." -- Mark
I'm persuadable to do sport/bouldering (if someone else has mats -I don't) and head elsewhere if there are no takers for trad... Cost of car hire is 34 + petrol. " -- Tor


I'd happliy go bouldering somewhere on Sunday if that's any good at all. Cant do saturday is to be spent car hunting with my father after mine sadly died...
Mark
2:03 PM, 23/01/15
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"There's something very disappointing about a 'mystery' climbing destination, which turns out to be stanage plantation." -- Mark
I'm persuadable to do sport/bouldering (if someone else has mats -I don't) and head elsewhere if there are no takers for trad... Cost of car hire is 34 + petrol.
Tor
1:25 PM, 23/01/15
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Am happy to hire a car and head somewhere climbing Saturday (Peaks?) if there are others who are keen? (Ideally get a 4 to spread the cost..)
Tor
1:03 PM, 23/01/15
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"George and I planning for w/c 9th March (I could only get that or w/c 23rd off). Anyone else free for a climbing trip somewhere warm?" -- Flick

Clare and I are going to visit Sesh and Iza in Finland for a week on 11th March Grinning Grinning Definitely won't be warm....
Jenny
12:13 PM, 23/01/15
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George's oath rota
They have to take turns at swearing? That's harsh Wink
Niall H.
9:31 PM, 22/01/15
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THere's something very disappointing about a 'mystery' climbing destination, which turns out to be stanage plantation.
Mark
7:25 PM, 22/01/15
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Almost certainly going to the Peaks, and taking bouldering mats because it's too damn cold to be sitting on top of Stanage.

But don't tell anyone, because... it's a mystery.
Mark C
5:33 PM, 22/01/15
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Anyone actually know where the meet is going? And don't say it's a mystery!
Steve
5:16 PM, 22/01/15
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I meant ortho - sill autocorrect Rolling eyes
Mary
3:25 PM, 22/01/15
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Boo. I'll try and swap the week but won't know for a bit. Can I just say that George's oath rota is RIDICULOUS - so much leave! Grrrr Wink
Mary
3:25 PM, 22/01/15
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George and I planning for w/c 9th March (I could only get that or w/c 23rd off). Anyone else free for a climbing trip somewhere warm?
Flick
2:52 PM, 22/01/15
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FFMC closing Crying
Will B
12:24 PM, 22/01/15
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Sadly that died in 2010, I would like another one like it!
Mark
10:11 AM, 22/01/15
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"Anyone selling a cheap car?" -- Mark

Has the Peugot died? Or did that die a long time ago?
Robert
9:59 AM, 22/01/15
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Anyone selling a cheap car?
Mark
9:31 AM, 22/01/15
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.. and this time it was the start-of-term knots class at the pub when I arrived!
Niall H.
11:16 PM, 21/01/15
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I'm thinking of 20:00 for pub. No idea about the weekend, tho'
Niall H.
7:19 PM, 21/01/15
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Speaking of evenings and weekends, what time are people going to the pub this evening, and are there any thoughts on where we're going at the weekend?
Will B
6:25 PM, 21/01/15
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Getting evenings and weekends back is good!
Niall H.
5:03 PM, 21/01/15
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I can't swap as too many people are already off your week Mary Sad and I can confirm Mary's rota is unnecessarily complex!
George
3:35 PM, 21/01/15
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"And I get my weekends and evenings back - hurrah!!" -- Mary

Woo Happy
Dave A.
11:53 AM, 21/01/15
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Niall I'm heading back to the Royal Berks for 6 months of respiratory medicine. No doubt will be busy, but can't be worse than A+E. And I get my weekends and evenings back - hurrah!!
Mary
11:48 AM, 21/01/15
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Home owners in Oxford, anyone got a garage they don't really use and they want to rent out? Unlikely, but you never know.
Mark
11:29 AM, 21/01/15
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Problem solved. Neither I nor student spotted that the exact wording of the question required that the induced current be in the same direction as the current in the first coil. It's actually a very well disguised Lenz' Law question. D'oh.
Jamie
10:42 PM, 20/01/15
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Complicated rotas are never good Sad What's the new job?
Niall H.
10:28 PM, 20/01/15
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There's a chance I can swap to the week 2nd but I won't know til I start my new job which will be in 2.5 weeks' time. I have no idea who#s on my team, how to swap, and whether there would be enough ward cover. Oh the joys of medical rotas! George has seen the rota and will agree it's very multicoloured and complicated Rolling eyes
Mary
7:21 PM, 20/01/15
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Okay, I'll update tomorrow re. hol dates. I definitely can't do first week in March, and pretty likely to be able to w/c 9th or 23rd.
Flick
6:52 PM, 20/01/15
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Jamie, are you sure the question wasn't which will NOT result in a current being induced? Because answer A will in fact induce a current as well - as the coil is moved closer/further away, it experiences a stronger/weaker magnetic field - i.e., a varying magnetic field, which will induce a current. This is the same as when the variable resistor is twiddled changing the magnitude of the current in the first coil and thus the strength of the magnetic field experienced by the second coil.
Gillian
4:02 PM, 20/01/15
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Flick and Mary: my leave is technically moveable but am on call several days the week Mary is off so would involve a complex swap...just checking the details to see if it is possible or not. So currently off 2nd til 15th inclusive (finishing nights morning of 2nd ).
George
3:36 PM, 20/01/15
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Don't really believe the "sit back and wait" interpretation: in both B and C they describe performing a single action, and don't restrict observation to any specific time window.
Will B
12:52 PM, 20/01/15
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Not able to remember any of the physics, but I would have thought if opening a switch induces a current then changing a resistance would do so too. The switch is effectively a variable resistor with only two settings. Opening the switch changes resistance from zero to infinity, so if you had an "ideal variable resistor" you could make it act exactly like a switch.
Will B
12:50 PM, 20/01/15
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So they have read C as 'twiddle resistor, sit back, wait a moment, and then see if there is any induced current'.

It's just a badly worded question, isn't it? Given that in B there will only be an induced current for a short time anyway, it seems daft to have excluded C for the same reason. They should have said 'swap the resistor for one of a different value'.

Anyway, my basic understanding of the physics is OK, isn't it? Both B and C would induce current for a short period of time?
Jamie
12:36 PM, 20/01/15
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Maybe you're thinking of it as *during* the change to smaller resistance - as in twiddling a variable resistor, and they're thinking of it as *after* making a change to smaller resistance but then remaining at a constant resistance again?
Gillian
12:16 PM, 20/01/15
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Quick physics question on a topic I haven't looked at for a very long time:

You have two identical coils, arranged parallel to each other along a common central axis. One has current flowing in it in a simple circuit with a cell, switch and variable resistor all in series.

The question is: which of these actions will result in a current being induced in the second coil?
A) move coils closer
B) open switch
C) decrease resistance of variable resistor
D) No change is made

A and D both clearly wrong. My problem is that I think both B and C would induce a current in the second coil. The markscheme gives B - but why is C wrong? I'd have thought that changing the current would change the size of the B field and thus give a value to d/dt[BAN] for coil 2.
Jamie
11:34 AM, 20/01/15
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If it's the first week in March I might be interested...
Steve
10:21 AM, 20/01/15
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Boo Crying
Mary
9:24 AM, 20/01/15
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Sounds like we may be on the verge of a plan! I'll ask my boss tomorrow re 16th but I'm pretty sure it'll have to be the week before or after for me. I'll let you both know :-)
Flick
8:35 AM, 20/01/15
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I've just got my leave week - it's the week 16th March - please say that works??!!
Mary
12:13 AM, 20/01/15
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Flick I have holiday in March (morning of the 2nd til the 15th March), Mary and I were considering Kalymnos...subject to Mary's holiday falling in one of those weeks
Take it the week commencing the 9th and let's go CLIMBING somewhere Grinning
George
9:20 PM, 19/01/15
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"What-ho! I have a week's holiday to use before the end of March. Any Morocco plans/similar in the hatching?" -- Flick

I have a plan not to go to Morocco if that's any help?
Mark
9:06 PM, 19/01/15
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Especially after you're past the hatched area
That seems to be a navigational choice that's popular even outside of OUMC trips, especially at the Heyford Hill roundabout (or, indeed, "rotary")
Niall H.
8:20 PM, 19/01/15
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What-ho! I have a week's holiday to use before the end of March. Any Morocco plans/similar in the hatching?
Flick
7:25 PM, 19/01/15
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"Dave: after all, safety is our watchword Wink" -- Niall H.
I'do say we had a casual attitude towards safety, also known as casualty
Kerry

5:21 PM, 19/01/15
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Next time the relevant authorities ask us about our risk assessment, I might just reply with 'safety is our watchword' repeated a thousand times in different colours and font sizes..." -- Mark C

Should we get you an emended OUMC "Safety is..." tshirt in the hazard-yellow that is so popular among OUMC-ers at the moment?
Lina
5:09 PM, 19/01/15
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"We tend to let the navigator go un-blindfolded. " -- Dave A.

This differentiates Mystery Meets from normal meets, where it is obligatory for the navigator to be asleep at all times, but to occasionally shout directions like "Take this exit!" to the driver." -- Lina

Especially after you're past the hatched area.....

Alison
4:59 PM, 19/01/15
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"Dave: after all, safety is our watchword Wink" -- Niall H.

Next time the relevant authorities ask us about our risk assessment, I might just reply with 'safety is our watchword' repeated a thousand times in different colours and font sizes...
Mark C
4:24 PM, 19/01/15
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Dave: after all, safety is our watchword Wink
Niall H.
3:20 PM, 19/01/15
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We tend to let the navigator go un-blindfolded. " -- Dave A.

This differentiates Mystery Meets from normal meets, where it is obligatory for the navigator to be asleep at all times, but to occasionally shout directions like "Take this exit!" to the driver.
Lina
2:04 PM, 19/01/15
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Political correctness gone mad.
Mark
1:59 PM, 19/01/15
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"Attendees may or may not be blindfolded. Ditto the driver." -- Will B

We tend to let the navigator go un-blindfolded. It's the sort of concession to Health and Safety that the powers that be like to see us observe.
Dave A.
1:51 PM, 19/01/15
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""What is a mystery meet?!" -- Mark

One where we give up trying to guess what the weather will do, and admit that we'll just wing it on the day. Attendees may or may not be blindfolded. Ditto the driver." -- Will B


I see!
Mark
1:48 PM, 19/01/15
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"What is a mystery meet?!" -- Mark

One where we give up trying to guess what the weather will do, and admit that we'll just wing it on the day. Attendees may or may not be blindfolded. Ditto the driver.
Will B
1:00 PM, 19/01/15
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What is a mystery meet?!
Mark
12:55 PM, 19/01/15
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9th Feb TOTALLY counts as beginning of Feb. Happy
Lina
10:26 AM, 19/01/15
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I didn't get to use skis though, not that I have any to use. Day trips to north wales are good mind. I'm trying to decide if the 9th of Feb counts as the start of Feb for the purposes of going to Canada, so I can try to make the norwales meet this term..
Aileen
10:20 AM, 19/01/15
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Aileen wins at snow for the weekend.
Lina
9:31 AM, 19/01/15
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Well you would go North, Aileen! 😀
Clare
8:15 AM, 19/01/15
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Yay for snow, I like snow. We didn't have any here so I went off in search of some today. I now remember that I prefer my snow to remain stationary on the ground, and not blasted into my face at speeds which almost knocked me off my feet, I think I'd forgotten that Happy
Aileen
10:54 PM, 18/01/15
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Lyds and Ben were very proud, this afternoon, that they'd been able to get out on their skis Happy
Niall H.
10:01 PM, 18/01/15
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