h*h
发帖数: 18873 | |
a***a
发帖数: 12425 | |
I***i
发帖数: 14557 | |
B**o
发帖数: 1048 | |
I***i
发帖数: 14557 | 5 我脚着是真空，没有空气的气泡
【在 B**o 的大作中提到】
: 这团气泡没想明白。
|
h*h
发帖数: 18873 | 6
【在 I***i 的大作中提到】
: 我脚着是真空，没有空气的气泡
|
I***i
发帖数: 14557 | |
h*h
发帖数: 18873 | 8 应该是水蒸气？ 瞬间温度非常高。
【在 I***i 的大作中提到】
: 或者是水蒸汽
|
I***i
发帖数: 14557 | |
I***i
发帖数: 14557 | 10 似乎是真空
Cavitation Bubble
http://en.wikipedia.org/wiki/Cavitation
【在 h*h 的大作中提到】
: 应该是水蒸气？ 瞬间温度非常高。
|
|
|
I***i
发帖数: 14557 | 11 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 reaches over 5,000 degrees Kelvin - that'
s close to the surface temperature of the sun!
http://www.environmentalgraffiti.com/biology/news-1-shrimp-you- |
h*h
发帖数: 18873 | 12 速度太快了，所以又叫snap shrimp。
【在 I***i 的大作中提到】
: Cavitation Bubble
: http://en.wikipedia.org/wiki/Cavitation
|
h*h
发帖数: 18873 | 13 很厉害，有声音，还发光。
size
a
is
of
that'
【在 I***i 的大作中提到】
: 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 reaches over 5,000 degrees Kelvin - that'
: s close to the surface temperature of the sun!
: http://www.environmentalgraffiti.com/biology/news-1-shrimp-you-
|
h*h
发帖数: 18873 | 14 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 conditions. Hydrophone measurements in conjunction with
time-controlled high-speed imaging of the claw closure demonstrate that the
sound is emitted at the cavitation bubble collapse and not on claw closure.
A model for the bubble dynamics based on a Rayleigh-Plesset–type equation
quantitatively accounts for the time dependence of the bubble radius and for
the emitted sound. |
I***i
发帖数: 14557 | 15 是啊，世界真奇妙
【在 h*h 的大作中提到】
: 很厉害，有声音，还发光。
:
: size
: a
: is
: of
: that'
|
h*h
发帖数: 18873 | 16 高温是泡沫坍塌产生
【在 h*h 的大作中提到】
: 应该是水蒸气？ 瞬间温度非常高。
|
h*h
发帖数: 18873 | 17 不可思议
【在 I***i 的大作中提到】
: 是啊，世界真奇妙
|
I***i
发帖数: 14557 | 18 这个都杂志发表了，权威
the
【在 h*h 的大作中提到】
: 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
|
h*h
发帖数: 18873 | 19 小虾米进了这个杂志啊。
另外它钳子的材料很好啊，快速的咔咔打都没事
【在 I***i 的大作中提到】
: 这个都杂志发表了，权威
:
: the
|
p**********s
发帖数: 198 | |
|
|
k**h
发帖数: 2929 | |
B**o
发帖数: 1048 | 22 学习了
【在 I***i 的大作中提到】
: Cavitation Bubble
: http://en.wikipedia.org/wiki/Cavitation
|
B**o
发帖数: 1048 | 23 5000K有点匪夷所思，肌肉里的温度有多少K?
size
a
is
of
that'
【在 I***i 的大作中提到】
: 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 reaches over 5,000 degrees Kelvin - that'
: s close to the surface temperature of the sun!
: http://www.environmentalgraffiti.com/biology/news-1-shrimp-you-
|
B**o
发帖数: 1048 | 24 同感，世界真奇妙。
【在 I***i 的大作中提到】
: 是啊，世界真奇妙
|
