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Physics help ASAP !!!!!?

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Question by kool_kid_1: Physics help ASAP !!!!!?
1) 3 applications off a plane mirror
2) prove that the image in a plane mirror and the object are at equal distances from the mirror
3) State the number of images from when two mirrors are inclined parallel to each other

Best answer:

Answer by Ashok
1) * To watch one’s image
* CDs & CD- readers in computers [ see CDs back sides]
* To measure distances of far off objects ( eg mountains , moon ) by sending out lasers , noting the time in when we recieve a reflection ….(mirrors were left on the moon by astronauts)

2) A digram is required

3) infinite ( uncountable)

Add your own answer in the comments!

PhotonQ-Swan Song for the Moon
physic readers

Image by PhOtOnQuAnTiQuE
On the way home this morning, driving over the king’s lac near the castle, with a full, orange and falling moon, acting as a magnificent opera background, for the song of two swans… like two White Ships…swimming through the sea of Space…to the Moon…and beyond… an amazing and dream-like way to end the night and start the day =)

Dreaming about the moon and space, the great Curious Mind and Astrophysicist, Neil deGrasse Tyson, just shared his inspiring report and remarks at the U.S. Senate Testimony hearing this week, on the future of our (U.S) space program : Past, Present, and Future of NASA (Video)

By the way here is a great video of Neil DeGrasse Tyson who was asked by a reader of TIME magazine, "What is the most astounding fact you can share with us about the Universe?" This is his answer. Mind Astounding !!!

"If you want to build a ship, don’t drum up people to collect wood and don’t assign them tasks and work, but rather teach them to long for the endless immensity of the sea". — Antoine St. Exupery

…Exploration of the unknown might not strike everyone as a priority. Yet audacious visions have the power to alter mind-states—to change assumptions of what is possible. When a nation permits itself to dream big, those dreams pervade its citizens’ ambitions. They energize the electorate. During the Apollo era, you didn’t need government programs to convince people that doing science and engineering was good for the country. It was self-evident. And even those not formally trained in technical fields embraced what those fields meant for the collective national future…

…Let’s be honest with one anther. We went to the Moon because we were at war with the Soviet Union. To think otherwise is delusion, leading some to suppose the only reason we’re not on Mars already is the absence of visionary leaders, or of political will, or of money. No. When you perceive your security to be at risk, money flows like rivers to protect us…

…But there exists another driver of great ambitions, almost as potent as war. That’s the promise of wealth. Fully funded missions to Mars and beyond, commanded by astronauts who, today, are in middle school, would reboot America’s capacity to innovate as no other force in society can. What matters here are not spin-offs (although I could list a few: Accurate affordable Lasik surgery, Scratch resistant lenses, Cordless power tools, Tempurfoam, Cochlear implants, the drive to miniaturize of electronics…) but cultural shifts in how the electorate views the role of science and technology in our daily lives…

…Space is a multidimensional enterprise that taps the frontiers of many disciplines: biology, chemistry, physics, astrophysics, geology, atmospherics, electrical engineering, mechanical engineering. These classic subjects are the foundation of the STEM fields—science, technology, engineering, and math—and they are all represented in the NASA portfolio.

Epic space adventures plant seeds of economic growth, because doing what’s never been done before is intellectually seductive (whether deemed practical or not), and innovation follows, just as day follows night. When you innovate, you lead the world, you keep your jobs, and concerns over tariffs and trade imbalances evaporate. The call for this adventure would echo loudly across society and down the educational pipeline.

At what cost? The spending portfolio of the United States currently allocates fifty times as much money to social programs and education than it does to NASA. The 2008 bank bailout of 0 billion was greater than all the money NASA had received in its half-century history; two years’ U.S. military spending exceeds it as well. Right now, NASA’s annual budget is half a penny on your tax dollar. For twice that—a penny on a dollar—we can transform the country from a sullen, dispirited nation, weary of economic struggle, to one where it has reclaimed its 20th century birthright to dream of tomorrow.

How much would you pay to “launch” our economy?

How much would you pay for the universe?" …

—Neil deGrasse Tyson


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