Telescope Mirror Grinding Demonstration
Tuesday, December 1st, 2009 at
8:30 pm
Joe, amateur radio operator K8LKC, demonstrates a grinding operation on a 6 inch reflecting telescope mirror. Thanks for the video Joe, and 73 from NG9D.
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US $2.95
Nice machine, nice video!
Does the text really have to pop on the center of the video? It’s really annoying.
go to your dentist. He / she will give you a mouth gaurd to put on at night while you sleep
“he Enriquillo-Plaintain Garden fault is similar in structure and character to the San Andreas fault of California in that both are strike-slip in nature, meaning the plates move past each other in a horizontal direction, Mann said.
“The island of Hispaniola is caught between two tectonic plates,” said Michael Blanpeid, associate coordinator for the USGS’s Earthquake Hazards Program. “The North American and the Caribbean tectonic plates are shearing the island, crushing it, grinding it. And as that occurs, earthquakes pop off.”
A dozen major earthquakes measuring 7.0 or greater on the Richter scale have occurred in the Caribbean near Puerto Rico, the U.S. Virgin Islands and the island of Hispaniola in the past 500 years, scientists said.”
yeah, but deppends what you want to see…its good when you have very dark sky(30miles from city) and you want to see DS…
iono why, khaled ruins the vids. you got akon and khaled standing next to each other, it doesnt make a cool image, imo. but still, ill song, and the beat is off the hook.
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WC Damen / Herren = Water Closet Ladies / Gentlemen …. it’s a restroom for both guys and girls …. ooooooh how Euro !
If it's just informative and not persuasive in nature, you could explain how to do something. How to prepare a food and actually prepare it in front of the class, how to string or tune or play an instrument, how to do some kind of fundamental in any sport. You could also do a simple science experiment or demonstration, such as sticking a piece of paper to an upside-down cup of water and explaining how surface tension holds it on there. Basically, just take something from another class you're good at or interested in.
I use Apple’s Remote on my iPhone at parties. If I could hang a 10 inch thing on the wall and let my friends crontrol the music.
was that a real street address? are you tryin to show me a demonstration?
Pc everything maxed out too
How ya doing?, Let see Low Price! Fog Away Suction Fogless Shower Mirror, Clear a great day!
Cheers
not for nothing i would love to ride in a spaceship and go as far as million of lite years away lol if that ever can b possible….
I assume you're asking why bother to build a radio telescope if it has to be bigger to have the same resolution. Lots of reasons:
1. Some interesting things in space can only be seen with radio waves because that's what they emit or visible light is blocked by gas. Even things that can be seen in visible reveal different information with radio waves.
2. It's easier to build a radio telescope of a given size because it doesn't have to have as accurate of a surface. Telescope surfaces only need to be accurate to about 1/20'th of the wavelength of the radiation they are designed for. For visible, that means you need thick ground glass. For a radio telescope, thin sheet metal will do.
3. With radio telescope it's much easier to phase lock an array of widely dispersed telescope. This gives you the same resolution as one disk the size of the array. The VLA uses this trick to make a telescope effectly many miles in diameter.
In a way – aren't all the crowds at the torch relay at a pro Olympic demonstration?
HAHA shit, i have to bring one in to class for health project, damm i will also bring in this video that will be funny as fuck
Does he even hav it polar aligned???
When light passes from air into glass, it slows down. It's this change in speed that causes the light to reflect and refract as it moves from one clear material (air) to another (glass). Every material has an index of refraction that is linked to the speed of light in the material. The higher a material's index of refraction, the slower light travels in that material.
The smaller the difference in speed between two clear materials, the less reflection will occur at the boundary and the less refraction will occur for the transmitted light. If a transparent object is surrounded by another material that has the same index of refraction, then the speed of light will not change as it enters the object. No reflection and no refraction will take place, and the object will be invisible.
Oil has nearly the same index of refraction (n) as glass (n = 1.474). Different glasses have different indices of refraction. In oil, glass disappears, but other types of glass such as crown glass or flint glass remain visible. The best glass for this experiment is Pyrex glass.
Hey, I’m just wondering if you can tell me WHAT the small circular openings which burst open when the thrusters engage at 0:22 ARE. What are they called and what is their use? Thanks.
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My word is like a magic wand. My outlook is a mirror. Whn I look 4 things tht I can love, those things draw ever nearer! Wht do I say & see?
Download this free star chart and see "what's UP!" –
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I also have good luck at Salvation Armies and St.Vincent's thrift stores.
Oh dear, I just looked in a mirror for the first time this morning. Hot mess indeed.
Goodmorning twiggas the harder I work or sleep in a class the faster the day go by so I'm either sleeping or grinding every hour great day
this music reminds me of 2girls1cup
سیاست ایران با جهان موفق
Iran Tehran Evin prison Families demonstration
Download: unity4iran.posterous.com Iran Tehran 1 March 2010 Evin prison Families demonstration … Posted via email from unity4iran’s posterous
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Your anal with your blades O.o
hahaha
thats my last name?
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actually the first post is wrong.
goldfish are goldfish…. doesnt matter if they are orandas, bubble eyes, rykins etc.. All of them are varities of goldfish.
they can be crossed but it is harder to do.
You probably needed rotors and calipers as well, that is why shops charge so much for a simple brake job.
Star gazing on a Monday morning. It's calming, makes me feel like telescope =D
Advantages:
In schools that don't have money for supplies for every student, a demonstration allows students to see experiments they'd otherwise be reading about.
Demonstrations are great for showing concepts that are interesting, but that are not safe for kids to do themselves.
If a science teacher is very personable, then students who struggle with behavior will learn better this way than if they have experiment materials to fool around with.
Disadvantages:
Not hands-on, so the students will tend to learn less
Some students won't be able to see.
It will be less clear if students learned–in an experiment, if it goes wrong because the student doesn't understand it then the teacher immediately knows because the experiment didn't work. In a demonstration, the teacher has to give a quiz or essay to learn if they understand the concept.
In addition to the powerpoint presentation, you could demonstrate how a hydropower generator works by building a simple generator out of a kleenex box, wire, nail, and a small magnet – instructions at the first link.
Also, don't forget to to cover the ecological effects of hydropower on fish ( second link):