Sample Paper – 2008 Class – Physics Class – XII Dual nature of matter Q.1. State the dependence of work function on kinetic energy of electrons emitted in a photocell. If the intensity of incident radiation is doubled‚ what changes occur in the stopping potential and photoelectric current? Q.2. How does the maximum kinetic energy of the emitted electrons vary with the work function? Q.3. the frequency of incident radiation is greater than the threshold frequency in a photocell. How
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To begin‚ since the early 1930s the United States has been doing business nationally and internationally. Over time the business world has significantly advanced both technologically and the way a company conducts their processes. Even though the business world has become such an advanced process‚ companies are continually looking for ways to improve their business. Within one of the largest shipping companies in the United States called FEDEX; research will forecast a way to improve the company’s
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Assumptions “There has never been a law of physics that did not demand ‘space’ and ‘time’ for its statement.” John Archibald Wheeler Starting Assumption: Physics today has a large body of experimental observations and mathematical equations that correspond to the experimental observations. Therefore‚ on a superficial level it would appear that we have a good theoretical understanding of nature up to a limit that will be called the frontier of knowledge. However‚ there are many counter intuitive
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Louis De Broglie A FRENCH PHYSICIST * Prince Louis-Victor-Pierre-Raymond‚ 7th Duc de Broglie‚ otherwise known as Louis De Broglie‚ was a French physicist that came from a well grounded family‚ went to pursue his dreams‚ earned a Nobel prize‚ took time to go into the army‚ and discovered the wave nature of matter all in his life time. Louis De Broglie was the son of Pauline D’Armille and Louis Alphonse Victor de Broglie. De Broglie was the youngest of his family‚ including two older sisters
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Max Miedinger was born December 24‚ 1910 in Zurich Switzerland. His career as a typeface designer spanned some 54 years. He began studying at the Kuntsgewerbeschule after training as a typesetter from 1926 until 1930. He worked at several positions until 1956 when he became a freelance graphic designer. About a year later‚ he developed Helvetica in collaboration with Edouard Hoffman. The creation made by Max Miedinger and Eduard Hoffmann was originally titled Neue Haas Grotesk‚ but this title was
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Here’s How: 1. Ask for the essay’s required length. When your teacher tells you it’s an essay test‚ ask these two questions: 1. Will there be one essay topic or more than one? 2. What is the approximate length of the response or responses (if more than one) Some teachers give essay tests and require one long essay in response to one prompt. Others give essay tests and give two or three (or more) prompts. You’ll need to know more facts and details to support your answer/s if
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Camera Obscura is the beginning of the sophistication of today in the world of photography‚ which was invented by a Muslim named Al-Haitam often called Alhazen. Civilization the world has changed a lot through the camera. Because the camera is an important discovery that could change the world. Through the camera shots we all can capture the beautiful moment in the world‚ things important or not important in the world and we have experienced. Not many know to be an inventor Muslim Al-Haitam this
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Galileo Galilei Research Paper What is a conscientious objector? A conscientious objector is someone who stands up for what they believe to be right. Some obvious examples that come to mind would be Martin Luther King Jr.‚ who led the Civil Rights movement in the 1950’s and 1960’s‚ or Amelia Earhart‚ who was the first woman to fly solo across the Atlantic Ocean. An example that most people may not recognize is someone like Galileo Galilei. Galileo was a conscientious objector because he fought
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Leonhard Euler was considered of the greatest mathematicians that ever existed. He was responsible for creating many math concepts including the invention of i. He also wrote many books that are still used to this day to teach students all over the world. Leonhard Euler was born on April 15‚ 1707 in Basel‚ Switzerland. Before he decide to become a mathematician‚ he at first thought he was going to be a clergyman‚ a religious priest. His parents‚ however‚ saw his potential for mathematics and sent
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No Perfect People Critic‚ Oscar Wide‚ stated that‚ “The public is wonderfully tolerant. It forgives everything except genius.” To understand this quote the definition of a genius must be established and understood. In America there’s a central idea that a genius is an extremely clever or intellectual human being; however‚ we sometimes misinterpret that definition. Many Americans mistake the word genius to mean someone who is incapable of making mistakes. The truth is that most of the people who
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