t*y
发帖数: 2 | 1 A construction worker pulls a 5-meter plank up
the side of a building under construction by
means of a rope tied to one end of a plank.
Assume the opposite end of the plank follows a
path perpendicular to the wall of the building
and the worker pulls the rope at a rate of 0.15
meters per second. How fast is the end of the
plank sliding along the ground when it is 2.5
meters from the wall of the building? |
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p*****k
发帖数: 318 | 2 just would like to add that creepingdog's intuition is
more or less correct. there are cases the bug would NOT
be able to reach the other end - it's just not the case
for linear stretching.
e.g., instead of 2+t, the rope stretches following 2+2*t^2,
(accelerated expansion like our universe)
the maximum the bug could reach is:
pi/4 < 79% of the total length of the rope |
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a****5
发帖数: 2 | 3 Reference:
Here are the books I used for preparation. All the commons are just my
opinion.
1. "A Practical Guide to Quantitative Finance Interviews": You should be
fine with most of the standard
BT/Probability/Math/Option pricing questions if you truly UNDERSTAND every
part of the book.
2. "C++ Primer": It is too lengthy and is full of details. But it is very
comprehensive and you can find
everything there (before or after you are asked the questions :) )
3. "Effective C++": The first 10 ~ 20 it... 阅读全帖 |
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z*********n
发帖数: 94654 | 4 绳子拧在一起
top rope belay和lead belay最大的区别是，top rope是绳子都出去
了，你收，绳子非常顺流
lead belay是地上一摊，climb一边上，lead一边把绳子送出去
就算你一开始仔细把绳子过顺流了，上的时候还是会卷起来 |
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z*********n
发帖数: 94654 | 5 来自主题: _IronMountain版 - 奔了 Fight Gravity 1
Learn the basic safety skills necessary to pass our safety check and climb
at Rockreation.
In this 2 hour course, you will learn introductory top rope skills including
how to put on your harness, tie-in with a double figure eight climbing knot
, and how to use a friction-plate-type belay device to hold the rope for
another climber (belay). The class price includes the instruction, gear
rental for the day, and a week's membership, including rentals!
No experience necessary.
http:/ |
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a***a
发帖数: 40617 | 6 3 people rope team is the most common form. we can separate the spare ropes
at the both ends
of course i will be in the middle |
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w*******y
发帖数: 60932 | 9 Multipet Dog Toys in Bone Bag, 7-Piece Assorted Value Pack $5.80 free
shipping with Prime (FSSS) from Amazon. Good Reviews. Price subject to
change.
Bundle includes12-inch Original Loofa dog toy
7-1/2 plush curly pet toy
7-inch rope toy
5-inch vinyl football
3-inch tennis ball
4-inch knotted rope ball
4-inch rubber ring
Multipet Dog Toys in Bone Bag, 7-Piece Assorted Value Pack:
http://www.amazon.com/Multipet-Toys-7-Piece-Assorted-Value/dp/B
|
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w*******y
发帖数: 60932 | 10 $2.21 for 16 oz (one pound) of Germany quality Haribo Gummi Grapefuit (
grapefruit has excellent reviews on amazon), Haribo Gummi Clownfish, Haribo
Gummi Twin Cherries, Haribo Gummi Colas, Haribo Gummi Bears, so on of the
many varieties.
Bagged in 5 pounds bags for $11.07 ($2.21 for one pound of Haribo), $11.07
price for the Haribo 5 pound bags that are currently on sale for $14.77 (
then discounted down to $11.07), many varieties. The other 5 pound bag
varieties that are currently on sale at a ... 阅读全帖 |
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w*****d
发帖数: 1172 | 11 【 以下文字转载自 JQCLUB 俱乐部 】
发信人: wetwild (南渡东藏西征北归), 信区: JQCLUB
标 题: Anybody know this bank--" Manhattan's Secret 8.2% Bank Account"
发信站: BBS 未名空间站 (Sun May 15 21:33:05 2011, 美东)
An Unbelievable Banking Secret
我收到的email广告，劝说我订它家的，不过这个银行看着很吸引人啊
" Manhattan's Secret 8.2% Bank Account"
Four Miles from the crooks on Wall Street, one unheard-of specialized New
York bank is breaking all the rules and paying its members an astounding 8.2
% annually...
And you'll be shocked to see which banks and mutual fun... 阅读全帖 |
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p***n
发帖数: 139 | 12 Mountaineering I is our most basic level of mountaineering instruction.
This outing is an excellent introduction for the fundamentals of travel
on the glacial snow and ice of the Pacific Northwest. Ice axe self and
team arrest, roped travel, cramponing and self-care are all techniques
covered in this class. This is a skills course, not a summit attempt!
Fee includes ropes, helmet, ice axe, transportation, and instruction.
Meet in Dixon Classroom
Fee: $ 100.00/$125.00*
#311 Pretrip: Tuesday, Apr. |
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p**********t
发帖数: 2636 | 13 01年加入北大山鹰社开始学习backpacking, rock climbing和mountainering。大学四
年一直在山鹰参加训练和参与组织活动。
05年毕业来美国，06年爬了两座雪山Mt. Rainier (DC route)和Mt. Iztaccihuatl (
Mexico)。今年七月要再次爬Mt. Rainier (Emmons Glacier)
因为在Michigan上学，平时基本就是每周两次攀岩，三次跑步，假期才能出来爬山
现在在Climbers' Association of Michigan上outdoor rock climbing的课，希望今年
秋天学完traditional rock climbing，冬天去上ice climbing的课程
这几年的目标：
- qualify boston marathon
- top rope redpoint 5.12, sports leading 5.11 (right now top rope redpoint 5
.11s, sports leading 5.10 a/b. V1/V2)
- do as muc |
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h********r
发帖数: 3291 | 14 从小喜欢爬山，都是休闲菜鸟级。对登（雪）山心向往兮，但近期内没条件。
一年半前开始室内攀岩，目前室内top rope 5.11c/d，sport lead 5.10s。室外仅限于
top rope。目标今年开始室外trad。 |
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c*******r
发帖数: 13580 | 15 Reference: Selected Climbs in the Cascades, Jim Helson, V1 2nd Edition.
Climb 47
We car camped at the trailhead on Friday night. It began drizzling in the
middle of the night. At 4AM, we woke up and shuttled. It was rainy and
chilly. We started off from Boston Trailhead, followed the heavily brushy
trail to Boston Basin. It was wet, cold, and foggy.
We roped up on Quien Sabe Glacier. Mike, Jonathan, Doug and I lead 4 ropes.
There were several crevasses open, but nothing too serious. At 11am, we |
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p**********t
发帖数: 2636 | 16 The way of climbing trees like this in ecological research is shoot the rope
over a branch, and ascend the rope |
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q*n
发帖数: 1203 | 17 直接射个软梯上去不行么？ 呵呵
ascend the rope对体力要求还是蛮高的， 你们专业都是户外活跃人士么？
rope |
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T*********e
发帖数: 39815 | 18 personal pro的用途太多了．比如说你到了anchor，只需要１０秒钟，就能把personal
pro挂上，然后你的belayer就解放了．如果用rope,限制很多，速度也慢
当然rope是最结实的，如果你在multi pitch那里belay别人，除了personal pro之外，
也要挂在绳子上
起了
个， |
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d*i
发帖数: 9453 | 19 RIP
http://seattletimes.nwsource.com/html/localnews/2018496302_apus
LONGMIRE, Wash. —
A Mount Rainier climbing ranger has died during efforts to rescue four
injured climbers from Waco, Texas.
Mount Rainier National Park spokesman Kevin Bacher (BAA-ker) says
34-year-old Nick Hall fell 3,000 feet Thursday from the 13,700-foot level
of the 14,411-foot mountain. He was dead when other rangers reached him
several hours later.
A helicopter plucked two of the injured climbers off the mountain Thursday
... 阅读全帖 |
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d*i
发帖数: 9453 | 20 RIP
http://seattletimes.nwsource.com/html/localnews/2018496302_apus
LONGMIRE, Wash. —
A Mount Rainier climbing ranger has died during efforts to rescue four
injured climbers from Waco, Texas.
Mount Rainier National Park spokesman Kevin Bacher (BAA-ker) says
34-year-old Nick Hall fell 3,000 feet Thursday from the 13,700-foot level
of the 14,411-foot mountain. He was dead when other rangers reached him
several hours later.
A helicopter plucked two of the injured climbers off the mountain Thursday
... 阅读全帖 |
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g****y
发帖数: 323 | 21 很好玩的detective game.
条件:3-6人
道具:棋盘, 棋盘上有9个房间
牌, 6个道具牌, 6个人物牌, 9个房间牌(与棋盘上相对应)
棋子, 每个玩家任选一个人物(与人物牌对应). 棋子对应人物.
玩法:任选道具牌,人物牌,房间牌一张, 构成剧情.
将剩下的牌混合然后分发(牌数不一样多没有关系)
比如说, rope, studyroom, Mr. white. 那么就是
Mr.white commmited murder at the studyroom using rope.
胜利条件: 先猜出来者为胜.
规则:1. 玩家顺序掷赛子, 走到某一房间的人可以做出推测.
2. 该推测只能限定在该房间, 除此之外没有限制.
3. 做完推则后, 如果下家可以否定该推测, 必须否定,同时
将否定的牌出示给做出推测的人. 如果不行, 就pass到下一个人,
看其是否能够做出否定, 以此类推.
4. 最终推测可以在该玩家得到掷赛子的时候做出, 也可以在该玩家在
|
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b*****t
发帖数: 9671 | 22 下午11:00（31 分钟前）8964 苏联“六四”档案解密：“六四”屠杀三千人从 童言无
忌 戈尔巴乔夫支持六四屠杀。
http://www.google.com/buzz/109245144142018091431/X2G2iCMcpux
Reshared post from Pillar Chang.8964 苏联“六四”档案解密：天安门死3000人 -
诸哥驿站·博客·网摘
作者：封从德 注意这一段对话： Lukyanov reports that the real number of
casualties on Tiananmen Square was 3,000.（Lukyanov：天安门的真实死亡数字是
3000人） Gorbachev: We must be realists. They, like us, have to defend
themselves. Three thousands . . . So what?（戈尔巴乔夫：我们必须现实。他们和
我们一样，必须维护自己。三 千。。。那又怎么样？） 这是“六四”屠杀三千人的最
新证据。此前有三个证据指向三千人这个... 阅读全帖 |
|
发帖数: 1 | 23 逃亡到美国的郭文贵一直标榜自己崇尚法治、遵守法律，而随着他在国内的一桩桩犯罪
行为曝光，郭文贵藐视法治、践踏法律的真面目也逐渐暴露在世人面前。
在国内，他的犯罪同伙纷纷在确凿的证据面前认罪，并指证郭文贵就是这些罪行的主谋
和共同参与者。在国外，郭文贵却在纽约的豪宅里毫无愧色的兜售他荒诞的故事，从拼
命否认到百般狡辩，再到后来破罐子破摔干脆承认罪行，倒打一耙说中国政府对他进行
“政治迫害”来博取美国政府的庇护。
殊不知，无论是在中国还是在美国，郭文贵的所作所为都是法律所不能容忍的。
1、行贿罪
郭文贵一直挂在嘴边的“马部长”——原国安部副部长马建，因受贿罪落马后曾公开透
露，郭文贵在2009年到2014年5年间送给他共计6000余万元的款物，为了攀上马建的关
系，郭文贵送钱送房送古玩字画，马建一家出行旅游、穿衣购物都成为郭文贵行贿的机
会。马建的女儿在纽约上学期间，郭文贵还包下一套公寓供她居住。
通过向马建行贿，“马部长”成为了郭文贵手中的一张牌，从报复反目成仇的前合作伙
伴曲龙，到打压竞争对手收购民族证券；从解除巨额资金的冻结，到减少违建处罚；从
调查北大方正的公司账目，到删除媒体的负... 阅读全帖 |
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h**e
发帖数: 9290 | 24 http://ocef.org/publication/donor-newsflash/626-donor-newsflash
OCEF Donor Newsflash
项目动态：网络募书
这张照片是云南省文山壮族苗族自治州广南县曙光乡鸡街小学的传书活动。孩子们对图
书的期盼和拿到新书的开心溢于言表。鸡街小学是海外中国教育基金会网络募书项目的
第一个受惠学校。
网络募书是海外中国教育基金会推出的图书项目之一。基金会的网络募书义工根据需要
捐助学校的学生人数、孩子们的年龄和需求，精心挑选了最适合他们读的书，在书商的
网站上设立心愿单。捐助人只要进入心愿单进行认购，所认购的书就会由书商直接按预
设好的配送地址送到学校。捐助人不管身在国外还国内，都能通过网络操作轻松完成捐
助，简单方便。需要捐助的学校，也都经过基金会严格筛选，并有专门的义工跟进，帮
助学校在收到图书后能开展相应的借阅和读书活动，鼓励孩子们多读书。
继鸡街小学之后，网络募书项目又持续为更多资源贫乏的乡村学校进行了网络募书，包
括甘肃理川扎龙小学、宁夏银川八里桥小学、湖北大悟南田小学、以及湖南永州眼头小
学等，目前正在募书... 阅读全帖 |
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m********y
发帖数: 21909 | 25 不是。Europe据说真正的意思就是一条绳子的意思。eu rope， 从法语的角度还是拉丁
语的角度，这个我不知道，但我知道eu， 在法语就是a的意思。
这与earth得查这个词怎么来的。 |
|
w**t
发帖数: 3247 | 26 Wrong. The so-call the Huo Pao, or Tie Huo Pao in Song/Jin is putting the
gun powder in a metal shell and use the explosion, though, it was NOT like
artillery in Ming. When Mongolian assaulted Bian Liang, the defence side was
using a rope like pendulent to deliever the explosive. |
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p***q
发帖数: 515 | 27 看来LZ严重脑残，居然不知道任何一种语言都有多义词。查一下英英词典，大部分词都
有多个含义，可以对应中文多个词。可以说中文更严谨。LZ举例的end，就既可以做动
词，又可以做名词，作名词是的含义也很多：对应中文的 末尾、端、尽头、梢、终止
、结局、结果、 目标、 目的、死去 等等。
End
–noun
1. the last part or extremity, lengthwise, of anything that is longer than
it is wide or broad: the end of a street; the end of a rope.
2. a point, line, or limitation that indicates the full extent, degree, etc.
, of something; limit; bounds: kindness without end; to walk from end to end
of a city.
3. a part or place at or adjacent to an extremi |
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v*****s
发帖数: 20290 | 28 从david glantz 10年的一个interview来看，他是肯定徒手冲锋再加督战队机枪的存在
的，即使是284师。
What is the Soviet strategy?
To feed just enough troops into the city to keep it from falling. They are
sacrificial lambs. Divisions that come in with 10,000 men have 500 the next
day. Many divisions are fragments. The 13th Guards, always described as an
elite force, was destroyed two months before; they're sent in half-trained
and one-third equipped. The 284th Rifle Division, popularized in the film
Enemy at the Gates—only one of its... 阅读全帖 |
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t*n
发帖数: 14458 | 29 渡河时候没枪是真的
不过没有徒手冲锋的确实记录
记得以前看到是冲锋之前给发了枪
徒手冲锋太脑残了，除了送死p用没有
从david glantz 10年的一个interview来看，他是肯定徒手冲锋再加督战队机枪的存在
的，即使是284师。
What is the Soviet strategy?
To feed just enough troops into the city to keep it from falling. They are
sacrificial lambs. Divisions that come in with 10,000 men have 500 the next
day. Many divisions are fragments. The 13th Guards, always described as an
elite force, was destroyed two months before; they're sent in half-trained
and one-third equipped. The 284th Rifle Division,... 阅读全帖 |
|
z**********e
发帖数: 22064 | 30 http://www.peruviantimes.com/06/beyond-machu-picchu-choquequira
Beyond Machu Picchu -- Choquequirao, Lost City in the Clouds
By Gary Ziegler --
The first rays of morning sunlight illuminate the great stone altar,
streaming through a square opening over my head. “Inti camac sumac,”
chants the priest. Soaked in sweat, I fight the bindings holding me to the
stone as the grinning, looming, scarlet-cloaked figure slowly brings down a
gleaming, bloodstained bronze knife toward my heaving chest.
“Jefe,... 阅读全帖 |
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M*P
发帖数: 6456 | 31 【 以下文字转载自 Military 讨论区 】
发信人: MHP (马后炮), 信区: Military
标 题: Re: 周末看了一点金字塔资料、发现长城给她提鞋都不够
发信站: BBS 未名空间站 (Mon Sep 25 10:58:58 2017, 美东)
It's simple but forgotten technology:
start at 27min, two people move a half ton block with rope and wood rail
easily:
https://youtu.be/ylmCri6dC4E
A scaled up version of wood slide was found in a museum. |
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w*******g
发帖数: 9932 | 32 wrong.
capitalists will sell the rope to hang them with.
this is how things work |
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G***G
发帖数: 16778 | 33 the worker are tightening a rope. |
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c****g
发帖数: 37081 | 34 两挂，包括个条子。
BALTIMORE – A fight at a Baltimore nightclub spilled onto the street early
Sunday and led to an eruption of gunfire that killed a police officer and
another man and left four people hurt, police said.
One of those wounded also was a police officer, who was shot in the leg,
said police spokesman Anthony Guglielmi. Investigators were trying to
determine if officers may have fired on a fellow officer whose badge and
other identifying markings came off his uniform during the scuffle, he sa... 阅读全帖 |
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k*****t
发帖数: 186 | 35 伤者的Aunt在CNN贴了comment了，这个人是重伤，失去知觉了，没办法自救。而且如果
用绳子垂直吊出来，会使他血压过高而死。摄像头发现已经没有生命迹象了，所以才决
定放弃的。
Comment在这：
http://www.cnn.com/2011/US/03/04/nevada.mine.trapped/
DennisMary
This is my nephew. The real story is that he was still alive Thursday night,
but just barely. The rescue workers did everything they could to find him.
By this morning, there were no signs of life, and the conditions are far too
dangerous to risk someone else's life to retrieve his body. The sha... more
This is my nephew. The real ... 阅读全帖 |
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W*******a
发帖数: 1769 | 36 http://thecnnfreedomproject.blogs.cnn.com/2011/03/08/generation
off-debts-through-slavery/#comment-2492
12:44 AM ET
Share
Comments (587 comments)
Permalink
Generations pay off debts through slavery
Uttar Pradesh, India - An army of workers, their faces encrusted with
dust, toils beside a story-high pile of unfired bricks. They are helping
build a new India that appears to be leaving them behind.
From sunup to sundown they spend their time pouring wet mud into molds,
lugging them to the kiln, fir... 阅读全帖 |
|
N***r
发帖数: 2539 | 37 for PWR, the control rods drops from the top, you have to send an axe man to
cut the rope to let the control rods falling down, that's why the control
rods system is so-called SCRAM (safety control rods axe man).
for BWR, the control rods inserts from the bottom, which is more difficult
to implement. you have to send couple of ppl to push and hold the rods. |
|
u***r
发帖数: 4825 | 38 http://www.economist.com/node/18586448
Africans are asking whether China is making their lunch or eating it
ZHU LIANGXIU gulps down Kenyan lager in a bar in Nairobi and recites a
Chinese aphorism: “One cannot step into the same river twice.” Mr Zhu, a
shoemaker from Foshan, near Hong Kong, is on his second trip to Africa.
Though he says he has come to love the place, you can hear disappointment in
his voice.
On his first trip three years ago Mr Zhu filled a whole notebook with orders
and was sur... 阅读全帖 |
|
m**********n
发帖数: 27535 | 39 CHICAGO — The deadliest US tornado season in 75 years has ripped babies
from their mother's arms and transformed entire towns into apocalyptic
scenes of destruction as the toll hit 523.
And it isn't over yet.
While warmer summer weather should hopefully reduce their intensity, the
peak tornado season runs through July and twisters can strike at any time.
The damage is as unimaginable as it is unpredictable.
Funnel clouds drop out of a darkened sky, tossing cars and mobile homes up
into the air, ... 阅读全帖 |
|
c**i
发帖数: 6973 | 40 Harpoon is A/R/UGM-84.
AGM stands for air-to-ground missile; RGM Radar Guided Missile; UGM
Underwater Guided Missile.
(1) Harpoon Block II; Backgrounder. Boeing, undated.
http://www.boeing.com/defense-space
/missiles/harpoon/docs/HarpoonBlockIIBackgrounder.pdf
Quote:
"Weight:
1,160 lb. Air configuration
1,459 lb. ASROC configuration
1,520 lb. TARTAR configuration
1,523 lb. Capsule/canister configuration
"Propulsion: Air-breathing turbojet engine (cruise), solid-propellant
booster
Note:
(a) RUR-5... 阅读全帖 |
|
W***n
发帖数: 11530 | 41 This day in history – JAL Flight 123 Crashes
Posted on August 12, 2010 by admin
On 12 August 1985 crashed into a Boeing 747-SR46 of the Japanese airline JAL
Japan Airlines Flight 123, on the Tokyo International Airport to Osaka
Itami Airport at an altitude of 1460 meters from the mountain Takamagahara
in Gunma Prefecture, Japan, about 100 km from Tokyo station.
All 15 crew and 505 of the 509 passengers died in the disaster. It is the
heaviest flying accident with only one machine involved.
The B... 阅读全帖 |
|
s********n
发帖数: 26222 | 42 veterans today issues a scathing report on this propagandist ploy. Good
report. Another sign veterans aren't buying the ploy of deception.
“Bin Laden” Heroes Probably Murderered to Keep Them Quiet. Some Possibly
Killed in Abbottabad Helicopter Crash Months Before
Today 31 NATO troops, 20 of them Navy Seals from the Osama bin Laden
operation died in what is reported as a helicopter crash in Afghanistan.
The chances of this story being true is almost nil. The chances of this
being a staged coveru... 阅读全帖 |
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s********n
发帖数: 26222 | 43 veterans today issues a scathing report on this propagandist ploy. Good
report. Another sign veterans aren't buying the ploy of deception.
“Bin Laden” Heroes Probably Murderered to Keep Them Quiet. Some Possibly
Killed in Abbottabad Helicopter Crash Months Before
Today 31 NATO troops, 20 of them Navy Seals from the Osama bin Laden
operation died in what is reported as a helicopter crash in Afghanistan.
The chances of this story being true is almost nil. The chances of this
being a staged coveru... 阅读全帖 |
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S*********g
发帖数: 24893 | 44 http://www.nydailynews.com/news/national/2011/09/02/2011-09-02_
不过，华裔女也有所斩获，把白人的6岁儿子一脚踢下二楼摔死。
The death of a gorgeous California woman - found hanging naked from her
boyfriend's balcony with a rope around her neck and her hands and feet bound
- has been ruled a suicide.
But her family doesn't believe it for one minute.
Rebecca Zahau's family has retained a lawyer and is insisting they will not
rest until the findings point to homicide.
"We, her family and friends, do not believe it's a suicide. ... 阅读全帖 |
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w**j
发帖数: 1032 | 45 The act of murder is rampant in the Bible. In much of the Bible,
especially the Old Testament, there are laws that command that people be
killed for absurd reasons such as working on the Sabbath, being gay, cursing
your parents, or not being a virgin on your wedding night. In addition to
these crazy and immoral laws, there are plenty of examples of God's
irrationality by his direct killing of many people for reasons that defy any
rational explanation such as killing children who make fun of... 阅读全帖 |
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S****d
发帖数: 704 | 46 what about Feng Sheng?
I mean the rope...and other torturing
I believe they are all true.
be a man! |
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c*******2
发帖数: 617 | 47 列宁吹牛： "The Capitalists will sell us the rope with which we will hang
them."
土共： 卖绳索给美国， 坐看美国把自己吊死
---某共和党人 |
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