L**L 发帖数: 1802 | 1 谁能review,我帮你refer
TITLE:
Cavitation of liquid flow in electrospray mass spectrometry especially for
addition of internal calibrant in “accurate mass” measurements.
ABSTRACT:
“Accurate mass” measurements in electrospray mass spectrometry are
becoming more prevalent with increasing availability of mass spectrometers
with sufficient resolution. A reference compound is ideally admitted
separately but almost simultaneously with analyte and this is achieved by
use of a “dual sprayer” or voltage switc |
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l**********i 发帖数: 11748 | 2 气泡应该是Cavitation造成的
When the 【cavitation】 bubbles collapse, they force energetic liquid into
very small volumes, thereby creating spots of high temperature and emitting
shock waves, the latter of which are a source of noise. The noise created by
cavitation is a particular problem for 【military submarines】, as it
increases the chances of being detected by passive sonar.
话说这个
Cavitation可是螺旋桨杀手啊
设计螺旋桨时不光要考虑推进效率,还要尽可能的减少cavitation的产生 |
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发帖数: 1 | 3 Naval History and Heritage Command
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South Dakota I (Armored Cruiser No. 9)
1902... 阅读全帖 |
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h*h 发帖数: 18873 | 4 查了下:
strike by rapidly unfolding and swinging their raptorial claws at the prey,
and are capable of inflicting serious damage on victims significantly
greater in size than themselves. In smashers, these two weapons are employed
with blinding quickness, with an acceleration of 10,400 g (102,000 m/s2 or
335,000 ft/s2) and speeds of 23 m/s from a standing start, about the
acceleration of a .22 calibre bullet. Because they strike so rapidly, they
generate cavitation bubbles between the appendage and... 阅读全帖 |
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i*****s 发帖数: 15215 | 5 ☆─────────────────────────────────────☆
hwh (hwh) 于 (Sun Dec 2 18:11:48 2012, 美东) 提到:
这一锤下去,虾米咂晕,螃蟹壳裂。以前看文章,作者养这虾,换水时不小心,被才一寸
多的小虾来了下,手指立马见血了。
☆─────────────────────────────────────☆
carbonfiber (碳纤维) 于 (Sun Dec 2 23:09:27 2012, 美东) 提到:
的确是非常厉害,想象一下十几英寸的大个头要多凶猛:
http://the.honoluluadvertiser.com/article/2003/Feb/14/ln/ln01a.
一寸
☆─────────────────────────────────────☆
hwh (hwh) 于 (Sun Dec 2 23:47:47 2012, 美东) 提到:
才把录像上载,mit就当了,果然厉害!
话说这mit也太破了,还号称北美华人第一网站。
所以水族店从没见大个点卖,呵呵。
☆───... 阅读全帖 |
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h*h 发帖数: 18873 | 6 看到这个
Science 22 September 2000:
Vol. 289 no. 5487 pp. 2114-2117
DOI: 10.1126/science.289.5487.2114
Report
How Snapping Shrimp Snap: Through Cavitating Bubbles
Abstract
The snapping shrimp (Alpheus heterochaelis) produces a loud snapping sound
by an extremely rapid closure of its snapper claw. One of the effects of the
snapping is to stun or kill prey animals. During the rapid snapper claw
closure, a high-velocity water jet is emitted from the claw with a speed
exceeding cavitation condit... 阅读全帖 |
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q********g 发帖数: 10694 | 7 http://www.sonoc.cn/proficient-proficient-30.html
引用:
主要科研业绩:
(1)在国际上首创超声波空化效应(即声化学)处理水的新方法,被国际水处理界公
认为开创了一种新的水处理研究方向,包括我的论文在内,该领域论文被引用次数接近
3万次;
(2)提出并发展了一类新的光谱分析化学理论与方法,该研究于1996年获诺贝尔奖提
名,中国第一项获该奖提名的研究工作;
(3)在国际上发表了第一篇关于声化学反应器理论的论文,对声化学反应器的设计理
论做出了国际承认的奠基性工作。
(4)发现了近场型声化学反应器中声化学反应动力学规律;
引用:
主要国际性学术荣誉:
1996.3,获诺贝尔奖(化学)提名,中国第一位获该奖提名的学者,也是目前唯一一位
;(并且是百年诺贝尔奖历史上第二年轻的被提名者);
2001.9入编国际最著名的科技名人录:Who’s Who in Science and Engineering(国
际科学与工程名人);
2001.4, 获美国化学学会成立125周年荣誉会员证;
2001.4. 被美国化学学会授予Member-in-goo... 阅读全帖 |
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KV 发帖数: 5728 | 8 多谢这个链接,有个哥们太牛了,能让9.9匹马达推16尺的tracker,速度是17~23迈,
我上网搜了一下他说的cavitation plate,这个就是类似于车子后面的风板,等于让发
动机推船的时候尽量平推,youtube上的这个这个链接非常类似于我的小充气船on
plane时候,发动机的状态。
这么说,我实际上可以把这个9.9匹的马达加上一个cavitation plate,使得尾部不沉
,发动机可以平推船,这样理解对否? |
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w*********s 发帖数: 2136 | 11 【 以下文字转载自 WorldNews 讨论区 】
发信人: whiteclouds (/ 参考消息 /), 信区: WorldNews
标 题: 传闻TG潜艇在LA发射导弹示威
发信站: BBS 未名空间站 (Tue Nov 16 02:08:30 2010, 美东)
Chinese Submarine was not the first on US coast
Sneaking subs into waters off the west coast — its happened before
By Wayne Madsen
The firing of a submarine-launched ballistic missile by a Chinese Jin-class
submarine off the coast of southern California lastMonday at the height of
evening rush hour in Los Angeles was not the first time the U.S. Navy's anti
-sub... 阅读全帖 |
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w********s 发帖数: 343 | 12 不错不错, 有种有种!
MANILA -- A member of the House of Representatives on Monday sought the
imposition of higher taxes on China-made products amid the continuing
standoff at the Panatag shoal (Scarborough shoal).
House Assistant Majority Leader and Citizens Battle Against Corruption (
CIBAC) party-list Representative Sherwin Tugna said a legislation imposing
higher taxes on Chinese products could be the Filipino people's way of
protesting against China's "bullying."
"That (legislation) is possible and w... 阅读全帖 |
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k********k 发帖数: 5617 | 13 http://yaleglobal.yale.edu/cn/content/%E4%BD%A0%E5%A5%BD%EF%BC%
你好!亚洲呼叫中心诱唤西班牙语归来
前殖民地在20世纪追求独立,往往包括尽力把对被强迫接受的语言的依赖降低到最低程
度。在一些地方,例如前西班牙殖民地菲律宾,西班牙语这一殖民语言已不再是通用语
言,但另一殖民语言英语作为商业语言则受到拥护。如今,不到百分之一的菲律宾人讲
西班牙语。然而,作家马戈特•科恩(Margot Cohen)指出,少数保留了西班牙
语和口音的菲律宾人发现,他们的这种技能使他们能够在业务外包产业中获得更高的薪
水,并且与顾客保持亲切互动。西班牙政府和菲律宾政府已经联手建设语言速成课程,
吸引来自亚洲各地的学生。讽刺的是,重燃对殖民语言的兴趣,对之不再采取蔑视的态
度,能够减少菲律宾青年向海外移民,并且使得菲律宾在日益增长的呼叫中心(call-
center)产业中成为新的竞争者。——耶鲁全球
你好!亚洲呼叫中心诱唤西班牙语归来
菲律宾人不再蔑视可以提升工资和就业前景的殖民语言
马戈特•科恩(Margot Cohen)... 阅读全帖 |
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发帖数: 1 | 14 【阿波罗新闻网 2019-02-04 讯】菲律宾相关部门宣布,两名中国公民当地时间2019年
2月2日在扫毒行动中丧命。
新加坡《联合早报》2019年2月4日报道,菲律宾禁毒局宣布,两名中国公民前天(当地
时间2月2日)在针对他们的扫毒行动中丧命。
据彭博社报道,菲律宾当局在马尼拉以南的甲米地(Cavite)省起获274公斤的冰毒,
市值为19亿菲律宾比索(1菲律宾比索约合0.019美元)。
菲律宾肃毒局在声明中指出,当地军警周六(2月2日)展开扫毒行动,目标锁定两名中
国公民Vincent Du Lim和Hong Li Wen。这两人在行动中被打死。
http://t.cn/Ec749BA |
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n******r 发帖数: 236 | 15 我纠正一下我的例子,应该只有一吨推力(1000 千克力),忘了乘重力加速度(~10 m/s^
2)。所以代入公式的是10000 N.
如果你喷的是未加压的冷水,且喷向自由空间,基本上在流体力学上是free jet case,
i.e., the gauge pressure is ~0.你应该计算需要的喷速。
mass rate (m_dot) is 200 kg/s. Thrust T = m_dot*V. So V = T/m_dot = 20*1000*
10/200 = 1000 m/s.这是你需要的喷射速度。
继续分析这个设计,在喷口m_dot = density * V * area A.
如果假设水不可压缩,density 是个常数1000 kg/m^3.
你的火箭喷口面积 A = m_dot/(density*V)=200/(1000*1000)= 2e-4 m^2.
火箭的直径 ~1 cm!!
换句话说,如果你的喷水率固定(m_dot is fixed),水作为工作物质密度不变(没有爆
燃),thrust = m_dot^2/(density * A).
如果你想保... 阅读全帖 |
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w*********s 发帖数: 2136 | 16 Chinese Submarine was not the first on US coast
Sneaking subs into waters off the west coast — its happened before
By Wayne Madsen
The firing of a submarine-launched ballistic missile by a Chinese Jin-class
submarine off the coast of southern California lastMonday at the height of
evening rush hour in Los Angeles was not the first time the U.S. Navy's anti
-submarine warfare sensors in the Pacific have failed.
In 1981, a Soviet Victor-class nuclear submarine successfully evaded the
Navy's Sound ... 阅读全帖 |
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b***d 发帖数: 20 | 17 【 以下文字转载自 Environmental 讨论区 】
发信人: blood (kaka), 信区: Environmental
标 题: SCI期刊征审稿人和投稿
发信站: BBS 未名空间站 (Thu Feb 16 22:35:33 2017, 美东)
希望这个领域的博士生来帮忙审稿, 也欢迎大家来投稿,期刊一年出版2期, 下一期
是今年7月,录用的文章都会在7月这期出版。可以把你的简历发到s*****[email protected]
另外2015年2016年的所有文章已经可以free access
投稿网站: Online Submission of Manuscripts: mc.manuscriptcentral.com/jaot
You are cordially invited to submit your research paper to Journal of
Advanced Oxidation Technologies (ISSN: 1203-8407, eISSN 2371-1175).
The Volumes 18 (2015) and 19 (2016) ar... 阅读全帖 |
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u*****d 发帖数: 1009 | 18 替你GOOGLE了一下。
Sound tooth.
A tooth is recorded as sound if it shows no evidence of treated or untreated
clinical caries. The stages of caries that precede cavitation, as well as
other conditions similar to the early stages of caries, are excluded because
they cannot be reliably diagnosed. Thus, teeth with the following defects, in
the absence of other positive criteria, should be coded as sound:
white or chalky spots;
discoloured or rough spots;
stained pits or fissures in the enamel that catch t |
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s*********i 发帖数: 315 | 19 包子收到了, 谢谢!
你的No.18牙, 即使cavites多, 只要牙根情况还可以, 就不要拔. 这样的牙齿, 可以做
RCT (根管治疗), 然后Crown buildup, 最后是加Crown. 前两个治疗一般是保险公司付
80%, Crown自己要付50%. 这是一般情况, 具体付款额度要查你的保险. No18 是大牙,
付的钱比较多.(一共自付大约500-600, 去年的价格, 主要是Crwon贵) 治疗好的牙齿功
能完全恢复, 没有任何不适感觉. 如果保护得当, 可以终身使用.
补牙和拔智齿应该首先治疗. 这样的话, 可能你今年的额度就差不多了. 深度洗牙有预
防性质, 不是很紧急的话,可以安排在明年. |
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b***d 发帖数: 20 | 21 【 以下文字转载自 Environmental 讨论区 】
发信人: blood (kaka), 信区: Environmental
标 题: SCI期刊征审稿人和投稿
发信站: BBS 未名空间站 (Thu Feb 16 22:35:33 2017, 美东)
希望这个领域的博士生来帮忙审稿, 也欢迎大家来投稿,期刊一年出版2期, 下一期
是今年7月,录用的文章都会在7月这期出版。可以把你的简历发到s*****[email protected]
另外2015年2016年的所有文章已经可以free access
投稿网站: Online Submission of Manuscripts: mc.manuscriptcentral.com/jaot
You are cordially invited to submit your research paper to Journal of
Advanced Oxidation Technologies (ISSN: 1203-8407, eISSN 2371-1175).
The Volumes 18 (2015) and 19 (2016) ar... 阅读全帖 |
|
KV 发帖数: 5728 | 22 老兄提示的非常牛b,看来这个cavitation plate确实能极大提高马达的效率,网上很
多人讨论,我需要仔细研究看看,非常interesting,如果能够这样,那么极有可能9.
9hp的mercury big foot也能把我的船推到15迈左右,如果能达到15迈左右的速度,在
任何一个湖里和河里都足够了。
如果确实管用,我可以让dealer给改装一下马达。 |
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H********g 发帖数: 43926 | 23 你说得对,还真是通过摇造成局部低压,把溶解的气体放出来。
http://io9.com/5910150/the-physics-of-wine-bottle-opening
The bubble of air at the top of the bottle moves to the bottom of the bottle
as it gets accelerated backwards. The sudden, hard strike of the bottle
against the wall compresses the bubble of air. One side of it is being
pushed against the glass, the other side has the wine pressing against it.
The inside volume of the bottle stays the same size, but suddenly the volume
of the air bubble plus the volume of the ... 阅读全帖 |
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H****y 发帖数: 2992 | 24 (注:灵感来自iMaJia的贴。趁吃午饭时一气呵成。)
http://www.mitbbs.com/article_t/Joke/33597197.html
A:听说你是做高科技的?
B:没错,我们公司生产高科技马桶,我是总工程师。
A:马桶还要高科技?
B:现在搵食艰难,为了竞争,不得不想尽办法讨好顾客呀!
A:都怎么个高科技法?
B:最初是我们的日本竞争对手,推出了一款有便后自动洗PP功能的马桶,一按遥控,
就可以喷出温水。
A:那你们就跟着做好了。
B:问题是我们没那技术呀!一开始,老板想到的是拼人力,搞个廊坊远程操作。
A:人从哪里招?
B:先在网上打个广告:你想轻松挣大钱吗?不需要高学历,只要眼明手快,能同时进
行multitask就行了。
A:为啥要multitask?
B:你想啊,一个人负责一个马桶,多浪费人力,而且这马桶也不是随时都被使用。
A:有道理。
B:所以搞个工作间,每人面前摆一百个小屏幕,双鼠标拖曳点击操作。
A:点击就完了,干吗还要拖曳?
B:这是体现我们人工智能的地方啊。根据不同用户的生理特点,和当前便便情况的判
断,需要大水,就拖个大图标放到target... 阅读全帖 |
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H********g 发帖数: 43926 | 25 大白兔的震颤能达到cavitation的能量吗 |
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c**i 发帖数: 6973 | 26 The symptom (again not disease) of Cavelier King Charles Spaniel is ataxia.
But the genetic casue is different. See
Small Animals. The Merck Veterinary Mannual, undated.
http://www.merckvetmanual.com
/mvm/index.jsp?cfile=htm/bc/100416.htm
Quote:
"Ataxia of Jack Russell and Smooth-haired Fox Terriers causes ataxia and
dysmetria of the pelvic limbs at <6 mo of age. Signs progress over 1-2 yr.
Many cases manifest seizures. Spinal cord demyelination is found on necropsy
. Clinical signs may stabiliz... 阅读全帖 |
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k********k 发帖数: 5617 | 27 http://yaleglobal.yale.edu/cn/content/%E4%BD%A0%E5%A5%BD%EF%BC%
你好!亚洲呼叫中心诱唤西班牙语归来
前殖民地在20世纪追求独立,往往包括尽力把对被强迫接受的语言的依赖降低到最低程
度。在一些地方,例如前西班牙殖民地菲律宾,西班牙语这一殖民语言已不再是通用语
言,但另一殖民语言英语作为商业语言则受到拥护。如今,不到百分之一的菲律宾人讲
西班牙语。然而,作家马戈特•科恩(Margot Cohen)指出,少数保留了西班牙
语和口音的菲律宾人发现,他们的这种技能使他们能够在业务外包产业中获得更高的薪
水,并且与顾客保持亲切互动。西班牙政府和菲律宾政府已经联手建设语言速成课程,
吸引来自亚洲各地的学生。讽刺的是,重燃对殖民语言的兴趣,对之不再采取蔑视的态
度,能够减少菲律宾青年向海外移民,并且使得菲律宾在日益增长的呼叫中心(call-
center)产业中成为新的竞争者。——耶鲁全球
你好!亚洲呼叫中心诱唤西班牙语归来
菲律宾人不再蔑视可以提升工资和就业前景的殖民语言
马戈特•科恩(Margot Cohen)... 阅读全帖 |
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s*****r 发帖数: 469 | 28 哈哈,没啥特别的。只是几个小插曲还稍微有点意思。
我老板学术上非常严格,答辩这次是我唯一一次没有给她试讲一个报告。记得当年第一
次参加APS年会,我前后试讲了4次。从PPT,pointer的使用,用词衔接等等,各个方面
,一顿培训。之后一年,就降到了2次,再后面两次APS会议,我是组里第一个过关的,
算是培训出来了。这次比较有意思,虽然一点都不紧张,感觉挺水到渠成的,但是也不
知道为什么答辩前两天的晚上做了个紧张的梦,后半夜没怎么睡好。白天老板让给看
PPT,上午看不满意讲的顺序,改完要求下午试讲。结果一天根本注意力集中不了,非
常疲劳。然后就直接和她说,不行了,稍微讨论一下,晚上在准备了。她勉强答应,还
稍微说了几句宽心的话。第二天答辩,一大早准备了吃的和投影仪,一个人在那看PPT
,老本进来第一句话就是,“Are you OK?”我连忙说很好很好。不过答辩当天的确状
态不错,所以没怎么丢脸。
答辩委员会阵容还是挺强的。各个方向的都有,ME找了个热方向的,CE找了一个
cavitation的大牛,Annual review level的,自己系里一个搞计算的,也是Annual
rev... 阅读全帖 |
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f*******i 发帖数: 8492 | 29 Study on the pH-value method for ultrasound cavitation effect
measurements
By Xinnan, F.; Changping, Z.; Minglei, S.; Shichuan, H.; Jia, Z.
WIT Transactions on Modelling and Simulation (2005), 41(Computational
Methods and Experimental Measurements XII), 197-203.
Database: CAPLUS
Please sent it to: f*******[email protected]
Thanks a lot~ |
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f*******i 发帖数: 8492 | 30 Characteristic analysis of cavitation bubbles in carbon dioxide fluid
By Peng, Jianxin; Lu, Yigang
From Physics and Chemistry of Liquids (2010), 48(6), 736-746. Language:
English, Database: CAPLUS
http://www.informaworld.com/smpp/content~db=all?
content=10.1080/00319100902946437
please send it to:
f*******[email protected]
many thanks |
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h********y 发帖数: 2092 | 31 Title: Acoustic cavitation for engineering of gold sols in silver nitrate
solutions
Author(s): Radziuk Darya V.; Shchukin Dmitry G.; Moehwald Helmuth
ULTRASONICS SONOCHEMISTRY Volume: 18 Issue: 4 Special Issue: SI Pages
email:v********[email protected]
thanks |
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b***d 发帖数: 20 | 33 【 以下文字转载自 Environmental 讨论区 】
发信人: blood (kaka), 信区: Environmental
标 题: SCI期刊征审稿人和投稿
发信站: BBS 未名空间站 (Thu Feb 16 22:35:33 2017, 美东)
希望这个领域的博士生来帮忙审稿, 也欢迎大家来投稿,期刊一年出版2期, 下一期
是今年7月,录用的文章都会在7月这期出版。可以把你的简历发到[email protected]/* */
另外2015年2016年的所有文章已经可以free access
投稿网站: Online Submission of Manuscripts: mc.manuscriptcentral.com/jaot
You are cordially invited to submit your research paper to Journal of
Advanced Oxidation Technologies (ISSN: 1203-8407, eISSN 2371-1175).
The Volumes 18 (2015) and 1... 阅读全帖 |
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b***d 发帖数: 20 | 34 希望这个领域的博士生来帮忙审稿, 也欢迎大家来投稿,期刊一年出版2期, 下一期
是今年7月,录用的文章都会在7月这期出版。可以把你的简历发到[email protected]/* */
另外2015年2016年的所有文章已经可以free access
投稿网站: Online Submission of Manuscripts: mc.manuscriptcentral.com/jaot
You are cordially invited to submit your research paper to Journal of
Advanced Oxidation Technologies (ISSN: 1203-8407, eISSN 2371-1175).
The Volumes 18 (2015) and 19 (2016) are freely accessible at https://www.
degruyter.com/view/j/jaots
Aims and Scopes:
The Journal of advanced oxidation technol... 阅读全帖 |
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b***d 发帖数: 20 | 35 希望这个领域的博士生来帮忙审稿, 也欢迎大家来投稿,期刊一年出版2期, 下一期
是今年7月,录用的文章都会在7月这期出版。可以把你的简历发到[email protected]/* */
另外2015年2016年的所有文章已经可以free access
投稿网站: Online Submission of Manuscripts: mc.manuscriptcentral.com/jaot
You are cordially invited to submit your research paper to Journal of
Advanced Oxidation Technologies (ISSN: 1203-8407, eISSN 2371-1175).
The Volumes 18 (2015) and 19 (2016) are freely accessible at https://www.
degruyter.com/view/j/jaots
Aims and Scopes:
The Journal of advanced oxidation technol... 阅读全帖 |
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J****i 发帖数: 470 | 36 不错不错。呵呵。真空下压力基本都小于液体的饱和压力,和cavitation一样。
Laplace
change, |
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S*******l 发帖数: 2747 | 37 买个带inducer的泵先,架个试验台,泵进出口的什么流量,温度,压力都要能测到
搞点实际的data出来再模拟吧
想实际观察cavitation的话,最好泵壳是有机玻璃的 |
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j****x 发帖数: 943 | 38 I guess what you mentioned is the typical Multiple Reference Frame
kind of thing that Fluent would suggest. or a sliding interface kind
of method. But in this case, which is different from models like
stirring things in tank, how big the boundary surface should be?
On a second note, the propeller would be in a low rpm range, say 100-
200 rpm for huge vessels. The paper is about cavitation of propellers,
it's quite different.
given such
blades,
way, you
(blades)
is
pressure |
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a****e 发帖数: 2064 | 39 真空泵就是气体了,气体不可能出现绝对压力低于0.
绝对压力低于0说白了就是流体对壁面不产生压力反而产生拉力。
液体在实验室条件下好像出现过,但在工程条件下基本不可能。具体Brennen 有本书
cavitation里有讨论。这本书可以从caltech免费下载。
BUCKLING |
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D****R 发帖数: 6053 | 40 求8本电子书,每本1000伪币, 请PM我,如果你找到任何一本电子书,在此先感谢.
History of Shock Waves, Explosions and Impact: A Chronological and ...
By Peter O. K. Krehl
Wave Propagation in Fluids: Models and Numerical Techniques
By Vincent Guinot
Hydraulic Power System Analysis
By Arthur Akers, Max Gassman, Richard Smith
Hydraulics of Pipeline Systems
By Bruce E. Larock, Roland W. Jeppson, Gary Z. Watters
Hydraulics of Pipelines: Pumps, Valves, Cavitation, Transients
By J. Paul Tullis
Hydraulic Control Systems
By Herbert E. Merri... 阅读全帖 |
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b*****6 发帖数: 111 | 41 因为人在德州,正在申请德州的IM 和 FM。从一个FM program director 听说德州医生
协会最近有个名单,只有名单上合格的学校才有认证资格,才可以在德州做住院医。他
给我的名单上中国无一所医学院校合格。请看附件。按此类推,我们就全部无法申请德
州的program了。请大家核实并求助。
附件好像粘不上。有30页呢。贴下面吧。大家不要嫌长。总之所有学校都有代码。台湾都有几所在名单上。但是大陆一所没有。怎么办!!!!!
Schools Whose Graduates Do Not Have To Prove
Substantial Equivalence Of Their Education
100 ALABAMA
102 UNIV OF ALABAMA SCH OF MED, BIRMINGHAM
104 BIRMINGHAM MED COLL, BIRMINGHAM (EXTINCT)
106 UNIV OF SOUTH ALABAMA COLL OF MED, MOBILE
300 ARIZONA
301 UNIV OF ARIZONA COLL OF MED, TUC... 阅读全帖 |
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I***i 发帖数: 14557 | 42 Pistol shrimp have one normal claw, and one claw that is about half the size
of their bodies. The claw stays open until a muscle causes it to snap
closed, ejecting a powerful jet of water traveling at an incredible 60mph.
The snapping sound itself reaches 218 decibels - your eardrum ruptures at a
mere 150.
A bubble forms in the low pressure area behind the stream of water, which is
called a cavitation bubble. As the bubble implodes, it produces a flash of
light and the interior temperature reach... 阅读全帖 |
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m*********r 发帖数: 4692 | 45 Volvo has introduced the world's first external airbags on its new five-door
V40. Located at the base of the windshield, the airbag deploys from a cavit
y that expands upward from the rear of the car's hood in the event of a coll
ision with a pedestrian. |
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d*******s 发帖数: 15155 | 46 cd说奔驰新s级还有个底盘气囊呢,事故无法避免时起爆,弹起一块钢板插地上减速,
跟锚似的,不知道是不是戴妃事件研究结果
door
cavit
coll |
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