Worked solutions to student book questions Chapter 2 Analysis by mass Q1. a b Why was the soup sample in Worked Example 2.1 heated to 110°C? Why was it necessary to weigh the sample four times? A1. a b The soup was heated above 100°C to evaporate water from the sample. By repeatedly heating the sample until the mass remained unchanged‚ the analyst could be sure that all the water had been removed. Q2. Some laboratories use microwave ovens in place of conventional ovens to
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world ..................................... 12 Chapter 4 Agriculture and main crops .................................................. 17 Chapter 5 Industry .................................................................................... 23 Chapter 6 Trade and commerce .............................................................. 29 Chapter 7 Exports and imports of Pakistan .......................................... 32 Chapter 8 World population..................................................
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Question 1 Dr. Montessori gave us a Decalogue. Comment on each one of them. What can happen if we did not did not follow them. You could refer to your personal experiences. The Montessori Decalogue are explained as below. 1. Never touch the child unless invited by him (in some way or another). Unless there is a very strong reason to (like avoiding an accident‚ for example)‚ it is important that one should never touch a child unless a child requests it. Picking up a child without the child’s
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Chapter 16 Working Capital Management Learning Objectives After reading this chapter‚ students should be able to: ◆ Define basic working capital terminology. ◆ Calculate the inventory conversion period‚ the receivables collection period‚ and the payables deferral period to determine the cash conversion cycle. ◆ Distinguish among relaxed‚ restricted‚ and moderate current asset investment policies‚ and explain the effect of each on risk and expected return. ◆ Identify
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men and 4 women respectively? Select one: a. 12 ways b. 14 ways c. 10 ways d. 7 ways QUESTION 2 Not yet answered Marked out of 1 Flag question Question text If 5 coins are tossed‚ in how many ways can it happen that 3 coins fall tails? Select one: a. 6 ways b. 10 ways c. 4 ways d. 12 ways QUESTION 3 Not yet answered Marked out of 1 Flag question Question text How many combinations can the seven colors of the rainbow be arranged into groups of three colors each? Select one: a. 35 b. 40 c. 45 d. 30 QUESTION 4
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1. (Resource Demand) How do firms and individuals determine if it ’s worth it to (a) invest in capital improvements‚ (b) hire additional workers‚ or (c) decide where to work? Briefly explain. Answer – Firms and individuals determine if it’s worth it to invest in capital improvements when the marginal product of capital is more than the interest paid on each unit of capital. Similarly‚ when the marginal product of labor is more than the wage rate of each unit of labor‚ until then the firms and individuals
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Chapter 6 Student: ___________________________________________________________________________ 1. Which of the following refers to a situation where a government does not attempt to restrict what its citizens can buy from another country or what they can sell to another country? A. Free trade B. Unencumbered trade C. Sovereign trade D. Autonomous trade E. Open trade 2. Which of the following is not an example of one of the main instruments in trade policy used by governments around the world
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Experiment I: Thermochemistry Background: Thermochemistry is the branch of chemistry that focuses on the studies of chemical reactions or physical changes and heat associated with chemical reactions. According to the first law of thermodynamics‚ energy cannot be created or destroyed but it can be converted from one form into another and/or transferred between different atoms‚ molecules‚ or substances. In general‚ energy can be classified into two categories: kinetic and potential. Kinetic energy
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Macroeconomics Gleb Sazenkov (ADE AR) Chapter 6 1. Using the information in this chapter‚ label each of the following statements true‚ false or uncertain. Explain briefly. a. The national income identity implies that budget deficits cause trade deficits. False. Actually‚ if we look at the formula of our Y we can see that we don’t have anything there that could tell us that budget deficit can cause a trade deficit. Y = C + I + G + (X-IM/e) If we have a budget deficit‚ so our NX will be affected
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The System Development Life Cycle by Samuel Panici 1 Preliminary Investigation 6 System Maintenance 2 System Analysis 5 System Implementation 3 System Design 4 System Acquisition System Development Life Cycle (SDLC) is the process of implementing or updating a system. It includes six steps which starts with studying a system and is finished when the new or updated system is in place. At each stage in the cycle a decision is made whether or not to continue to the next phase. System Development
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