About the Authors Titu Andreescu received his BA‚ MS‚ and PhD from the West University of Timisoara‚ Romania. The topic of his doctoral dissertation was “Research on Diophantine Analysis and Applications.” Professor Andreescu currently teaches at the University of Texas at Dallas. Titu is past chairman of the USA Mathematical Olympiad‚ served as director of the MAA American Mathematics Competitions (1998–2003)‚ coach of the USA International Mathematical Olympiad Team (IMO) for 10 years (1993–2002)
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CURRENT PROTECTION FUNCTIONS ANSI 50/51 – Phase over-current ANSI 50N/51N or 50G/51G – Earth fault or sensitive earth fault ANSI 50BF – Breaker failure ANSI 46 -Negative sequence / unbalance ANSI 49RMS – Thermal overload CURRENT PROTECTION FUNCTIONS ANSI 50/51 – PHASE OVERCURRENT Three-phase protection against overloads and phase-to-phase short-circuits. ANSI 50N/51N OR 50G/51G – EARTH FAULT Earth fault protection based on measured or calculated residual current values: ANSI 50N/51N:
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Prime Minister announced mobile number portability across the country. The main question still remains‚ why should someone change to a different operator? One (big) reason is that before MNP was actually announced‚ switching to another operator involved a procedure of submitting documents and in the end when you finally got your number‚ you had to inform family‚ friends and colleagues about the change. All that will now change with the introduction of MNP. Here is a list of Frequently Asked Questions
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Case Study 12.31 and 12.32 This paper addresses the solutions to Case Study 12.31 and 12.32 in the textbook authored by David Marshall‚ Wayne McManus‚ and Daniel Viele “Accounting; What the numbers mean.” Both case studies bring about a better understanding of operating and financial leverage. This discussion includes the return on investment‚ return on equity‚ contribution margin‚ and break-even point. All these terms associate with the two types of leverage. The exertion of a force that
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4.3 4.3 Conversion Between Number Bases 169 Conversion Between Number Bases Although the numeration systems discussed in the opening section were all base ten‚ other bases have occurred historically. For example‚ the ancient Babylonians used 60 as their base. The Mayan Indians of Central America and Mexico used 20. In this section we consider bases other than ten‚ but we use the familiar HinduArabic symbols. We will consistently indicate bases other than ten with a spelled-out subscript
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DIRECTIONS (Q. Nos. 201 to 205) : In each of the following number series‚ a wrong number is given. Find out the wrong number. 201.6‚ 39‚ 213‚ 1090‚ 5496‚ 27525 (a) 3938 (b) 2159 (c) 1090 (d) 1096 Answer: C 202.17‚ 141‚ 358‚ 701‚ 1213‚ 1942 A‚141 B.854 C.857 D.171 Answer:A 203.6‚ 14‚ 51‚ 249‚ 1486‚ 10401 A.1436 B.5132 C.1476 D.1486 Answer:D 204.8‚ 24‚ 88‚ 232‚ 488‚ 887 A.242 B.884 C.232 D.None Answer:D 205.8‚ 21‚ 85‚ 421‚ 2521
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operate a business‚ you may be required to obtain a Federal Employer Identification Number (EIN) and should consider doing so even if not required. Commonly referred to as a federal tax ID number‚ an EIN is like a social security number for your business. Just as your social security number is used to identify you as a unique individual by government‚ financial and other institutions‚ an employer identification number is used to identify a business as a unique entity by government‚ financial‚ tax and
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Lab Design “Investigate the effect of a factor on the number of stomata of a leaf.” Research Question: How do differing leaf heights affect the number/density of stomata of a leaf? Hypothesis Stomata are pores‚ typically found under the leaf (lower epidermis)‚ that control the gas exchange of transpiration‚ where water vapor leaves the plants‚ and carbon dioxide enters. I predict that the stomatal density on high leafs is higher than on low leafs. During photosynthesis the chloroplasts
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Pythagoras: A Universe made of Numbers PART 1 Pythagoras & His Philosophy Pythagoras of Samos is often described as the first pure mathematician. He is an extremely important figure in the development of mathematics yet there is relatively little known about his mathematical achievements. Unlike many later Greek mathematicians‚ where at least we have some of the books which they wrote‚ there is nothing of Pythagoras’s writings. The society which he led‚ half religious and half scientific
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protons and neutrons make up the nucleus‚ while the electrons are found outside the atom’s nucleus. Each component of an atom has a charge to it. The protons have a positive charge. The electrons have a negative charge‚ and the neutrons have a neutral charge. The atoms also have a charge. For example hydrogen can be negative‚ positive or neutral. These are called ions. H would be a neutrally charged hydrogen atom‚ while H- would be a negatively charged hydrogen atom. H+ would be a positively charged
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