We study physics to acquire Knowledge about Nature and attempt to understand it.
Growing up, I had a legion questions concerning the world. The quest to understand the things around me and how they worked drove me into Physics.
The reason why I love it so much is because well, it helps me remove abstractions from the world and perceive and embrace it’s elegance. Or to put it bluntly, it lets me look at the world naked. And it’s breathtakingly beautiful!
And also it gives me the freedom to ask crazy questions and yet, come up with consistent solutions to them. ( Courtesy: mathematics ).
Well, the results were aesthetic. Ergo, I would suggest you make your own 3d hologram, its really worth it!
Have a Good Day!
Comets have two tails.
There are two types of comet tails: dust and gas ion.
A dust tail contains small, solid particles that are about the same size found in cigarette smoke. This tail forms because sunlight pushes on these small particles, gently shoving them away from the comet’s nucleus. Because the pressure from sunlight is relatively weak, the dust particles end up forming a diffuse, curved tail.
A gas ion tail forms when ultraviolet sunlight rips one or more electrons from gas atoms in the coma, making them into ions (a process called ionization). The solar wind then carries these ions straight outward away from the Sun. The resulting tail is straighter and narrower. Both types of tails may extend millions of kilometers into space. As a comet heads away from the Sun, its tail dissipates, its coma disappears, and the matter contained in its nucleus freezes into a rock-like material.
Comets don’t like the sun.
Comets lose a lot of mass when they go by the Sun. A lot: some shed hundreds of tons of material per second.
That’s actually a small fraction of the mass of a comet, but given
time, and lots of solar passes, it adds up. Every comet we see is slowly
dissolving in space. Eventually even the mighty Comet Halley will be
gone, broken down into a swarm of rocks, gravel, and dust once its gas
Government work may involve setting standards at the National Institute for Standards and Technology (the old National Bureau of Standards), which is important for all physics research. Government jobs pay well, but you will never become wealthy being a government physicist. But government work may also involve working in the weapons industry, which I highly discourage. (Not only for ethical reasons, but because that area is being downsized rapidly.)
Industrial work has its ebbs and flows. But lasers and semi-conductor and computer research will be the engines of the 21st century, and there will be jobs in these fields. One rewarding feature of this work is the realization that you are building the scientific architecture that will enrich all our lives. There is no job security at this level, but the pay can be quite good (especially for those in management positions – it’s easier for a scientist to become a business manager than for a business major to learn science.) In fact, some of the wealthiest billionaires in the electronics industry and Silicon Valley came from physics/engineering backgrounds and then switched to management or set up their own corporation.
But I personally think a university position is the best, because then you can work on any problem you want. But jobs at the university are scarce; this may mean taking several two-year “post-doctorate” positions at various colleges before landing a teaching position as an assistant professor without tenure (tenure means you have a permanent position). Then you have 5-7 more years in which to establish a name for yourself as an assistant professor
The Marangoni Effect – An affair with Surface Tension.
The Marangoni Effect says that fluid will want to flow from areas of lower surface tension to areas of higher surface tension.
Soap has a lower surface tension than Water/ Milk. And as a result, when soap is placed on the surface of a fluid ( as it is, in these animations) , it wants to flow away to areas of Higher surface tension.
And this propels the small boat, causes the pepper flakes to spread away, makes the string to expand, and the dye to fan out. It is also responsible for the Tears of Wine phenomenon that you might have already witnessed.
Perpetual motion machines… Wow! I haven’t had any productive design ideas for PMM’s at all. But I wish to share with you one of my favorites. It is highly efficient, but it eventually does succumb to nature.