Sample Paper – 2011 Class – X Subject – Science Time: 2 ½ Hrs General Instructions: I) ii) iii) iv) Maximum Marks: 60 The question paper comprises of two sections A and B. You are to attempt both the sections. The candidates are advised to attempt all the questions of Section A separately and Section B separately. All questions are compulsory. There is no overall choice. However‚ internal choice has been provided in two questions of five marks category in Section A and one question of 2 marks
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X-ray diffraction has perhaps been one of the most critical and exigent discoveries of the 20th century. Early X-ray diffraction images for tobacco mosaic virus had been collected before World War II. By 1954‚ Watson had discovered from his X-ray diffraction images that the tobacco mosaic virus had a helical structure‚ and was able to apply this to his famous DNA structure research. It is so valued because it allows the structure of a crystalline material can be determined‚ based on the diffraction
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Proposal for Operations Transformation at Westpac March 26‚ 2009 To: Ms. Gail Kelly‚ CEO and Managing Director‚ Westpac Bank Mr. Peter Clare‚ Group Executive‚ Products and Operations From: __________‚ Principal‚ Asia-Pacific & Australia‚ Verint Systems Date: March 26‚ 2009 Re: Operations Transformation at Westpac We are very pleased with the opportunity to deepen our partnership with Westpac and believe our proposal provides the most comprehensive approach for Westpac
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centroid of the triangle. 2. Force acting on a charged particle kept between the pair of plates‚ having equal and opposite charge‚ is F. If one of the plates is removed‚ find the force acting on the same particle. 3. The plates of a parallel plate system are charged up to 100V. A 4mm thickness dielectric slab is inserted between the plates. Then to maintain the same potential difference‚ the distance between the systems plates are increased by 2mm. find the dielectric constant. 4. A point charge placed
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doi:10.1038/nature07378 L ETTERS Correlation between nanosecond X-ray flashes and stick–slip friction in peeling tape Carlos G. Camara1*‚ Juan V. Escobar1*‚ Jonathan R. Hird1 & Seth J. Putterman1 Relative motion between two contacting surfaces can produce visible light‚ called triboluminescence1. This concentration of diffuse mechanical energy into electromagnetic radiation has previously been observed to extend even to X-ray energies2. Here we report that peeling common adhesive tape in
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RN-88 leadership Case Study: Delegation Jon Burnard is an RN on the 3 to 11 PM shift for a medical unit. The nurse manager has just announced that because of budget cuts‚ unlicensed assistive personnel (UAP) are going to be hired to assist RNs. Nurse Burnard is assigned to a pod that consists of himself and two unlicensed assistive persons to care for 18 clients. He realizes that he cannot complete the work himself‚ so he requests a description of the experience‚ skill level‚ and familiarity with
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Globusz® Publishing | | | Chapter 4 Standard Cost Learning Objectives * To understand the meaning of standard costing‚ its meaning and definition * To learn its advantages and limitations * To learn how to set of standards and determinations * To learn how to revise standards Introduction You know that management accounting is managing a business through accounting information. In this process‚ management accounting is facilitating managerial control.
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Calculating Sample Size Types of Samples Subjective or Convenience Sample - Has some possibility of bias - Cannot usually say it is representative - Selection made by ease of collection Simple Random Sample - No subjective bias - Equal chance of selection; e.g.‚ select the fifth chart seen on every third day - Can usually be backed to say it is representative Systematic Sample - Is a random sample - Equal chance of selection due to methodology; e.g.‚ computer-generated list of
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Today’s world has been divided into developing and industrialised countries which the main difference between them is the amount of money that governments apply in important sectors such as education‚ health and commerce. Most of the poorer nations are buried in debts as a result of their unbalanced finances which are reflect in a failed health care‚ an unstructured education system and a weak international trade. This vicious cycle will continue indefinitely unless wealthier nations show interest
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A one-sample test‚ also known as a goodness of fit test‚ shows whether the collected data is useful in making a prediction about the population. One sample tests are used when we have a single sample and wish to test the hypothesis that it comes from a specified population. In this case‚ the following questions are encountered: • Is there a difference between observed frequencies and the frequencies we would expect‚ based on some theory? • Is there a difference between observed and expected
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