t*******s
发帖数: 3031 | 1 World's slowest-moving drop caught on camera at last
How long would you be willing to wait for a drop of the black stuff in
Dublin? After 69 years, one of the longest-running laboratory investigations
in the world has finally captured the fall of a drop of tar pitch on camera
for the first time. A similar, better-known and older experiment in
Australia missed filming its latest drop in 2000 because the camera was
offline at the time.
The Dublin pitch-drop experiment was set up in 1944 at Trinity College
Dublin to demonstrate the high viscosity or low fluidity of pitch — also
known as bitumen or asphalt — a material that appears to be solid at room
temperature, but is in fact flowing, albeit extremely slowly.
It is a younger and less well-known sibling of an experiment that has been
running since 1927 at the University of Queensland in Brisbane, which
Guinness World Records lists as the world’s longest-running laboratory
experiment (see: Long-term research: Slow science). Physicist Thomas Parnell
set it up because he wanted to illustrate that everyday materials can
exhibit surprising properties. In the past 86 years that experiment has
yielded eight drops, with the ninth drop now almost fully formed and about
to fall. |
p********3
发帖数: 5750 | 2 哈哈，做这个有意思吗？ 闲啊。
investigations
camera
【在 t*******s 的大作中提到】
: World's slowest-moving drop caught on camera at last
: How long would you be willing to wait for a drop of the black stuff in
: Dublin? After 69 years, one of the longest-running laboratory investigations
: in the world has finally captured the fall of a drop of tar pitch on camera
: for the first time. A similar, better-known and older experiment in
: Australia missed filming its latest drop in 2000 because the camera was
: offline at the time.
: The Dublin pitch-drop experiment was set up in 1944 at Trinity College
: Dublin to demonstrate the high viscosity or low fluidity of pitch — also
: known as bitumen or asphalt — a material that appears to be solid at room
|
r********n
发帖数: 6979 | 3 前几个星期就掉下来了吧
现在等另外一个实验
investigations
camera
【在 t*******s 的大作中提到】
: World's slowest-moving drop caught on camera at last
: How long would you be willing to wait for a drop of the black stuff in
: Dublin? After 69 years, one of the longest-running laboratory investigations
: in the world has finally captured the fall of a drop of tar pitch on camera
: for the first time. A similar, better-known and older experiment in
: Australia missed filming its latest drop in 2000 because the camera was
: offline at the time.
: The Dublin pitch-drop experiment was set up in 1944 at Trinity College
: Dublin to demonstrate the high viscosity or low fluidity of pitch — also
: known as bitumen or asphalt — a material that appears to be solid at room
|
t*******s
发帖数: 3031 | 4 看它很多数据都已经有了，那研究上是没什么意义，但他们用很长时间演示一个简单的
过程，用实验表明沥青看起来是固体却有流体性质，最后用摄像记录这个过程，还是有
点耳目一新。
【在 p********3 的大作中提到】
: 哈哈，做这个有意思吗？ 闲啊。
:
: investigations
: camera
|
t*******s
发帖数: 3031 | 5 另外一个实验时间跨度更长，1927年搭好的漏斗和沥青。。。
【在 r********n 的大作中提到】
: 前几个星期就掉下来了吧
: 现在等另外一个实验
:
: investigations
: camera
|
t*********s
发帖数: 2956 | |
H******9
发帖数: 8087 | |
