Flow Through A Venturi Meter

Flow Through A Venturi Meter Given a Venturi Meter, Cv , the Venturi coefficient can be determined to compare the actual and ideal values as per Bernoullis predictions, for a volume flow rate. For better comparisons, two separate trials were analyzed and Venturi coefficients for both were computed. Trial 1 and Trial 2 yielded a Cv of 0.93 and 0.92 respectively. In this experiment the values calculated were found to be less than 1.0; this relatively high correlation between the experimental and ideal flows for the given Venturi meter however when compared to the ideal flow, the actual flow for this Venturi is not steady nor one dimensional. Therefore neither of these assumptions can be applied to any given actual flow. Nomenclature Variable/ Constant/ Symbol/Parameter Values Q Volume flow rate (m3/s) V Velocity (m/s) A Area (m2) à Ã‚ air Density of air, 1.23 kg/m3 à Ã‚ water Density of water, 1000 kg/m3 Cv Venturi coefficient Po Stagnation pressure (Pa) is Static Pressure plus Dynamic Pressure Patm Atmospheric pressure, 101.325 KPa Άh Height difference (m) between readings and Patm g Acceleration, 9.81 m/s2 z Elevation of Point (m) ( ½)à Ã‚ V2 Dynamic Pressure (Pa) P Static Pressure Flow Analysis Bernoullis Equation relates two points alongside a streamline as P1 + ( ½)à Ã‚ airV12+ à Ã‚ airgz1 = P2 + ( ½)à Ã‚ airV22 + à Ã‚ airgz2 z is negligible so à Ã‚ airgz cancels out on both sides leaving P1 + ( ½)à Ã‚ airV12+ = P2 + ( ½)à Ã‚ V22 Rearranging: P1 P2 = ( ½)à Ã‚ air(V22 V12) Note that Qideal = V1A1 = V2A2. Solving for V2 V2 = Subbing (5) into (3) and solving for V1 V1 = Then Qideal = A1 Flow Analysis (Contd) For the derivation of Qactual, sufficient distance from the Venturi inlet is assumed for a fluid particles relative velocity to be taken as zero. The same height (z value) as the Venturi will be taken for the particle. P1 + ( ½)à Ã‚ airV12+ à Ã‚ airgz1 = P2 + ( ½)à Ã‚ airV22 + à Ã‚ airgz2 z is negligible so à Ã‚ airgz cancels out on both sides leaving P1 + ( ½)à Ã‚ airV12+ = P2 + ( ½)à Ã‚ V22 as stated, the fluid particles velocity at point 0 is assumed to be 0m/s Patm = P2 + ( ½)à Ã‚ airV22 Solving for V2 V2 = P2 is defined as the static pressure at the inlet, found to be P2 = Patm + à Ã‚ watergΆh Subbing (9) into (8) V2 = To find Qactual Qactual = V2A2. Sub (11) into (12) where A2 is the cross sectional area Qactual = A2 Flow Analysis (Contd) With values for Qactual and Qideal, Cv can then be calculated with the relation Cv = For ideal static pressures combine (8) having solved for P2 and (4) having solved for V2 P2 = Patm ( ½)à Ã‚ airV22 P2 = Patm ( ½)à Ã‚ air Experimental Setup and Procedure The experiment was carried out per the instructions outlined in the course manual. However due to a problem with the apparatus and a constantly fluctuating Venturi meter, a camera was used to take a photo. Measurements were taken from the scale viewed on said picture. Figure Shows Experimental Setup Results For trial 1: Qideal = 0.01238 Qactual = 0.01153 The Venturi Coefficient, Cv, was calculated by using the values found for Qideal and Qactual and substituting them into equation (14). This value obtained was 0.93. To find the stagnation pressure, P = Patm and V = 0; the total pressure at this point is represented by P0 = Patm + ( ½)à Ã‚ airV2, however since V = 0 , the stagnation pressure is P0 = Patm. The Static Pressure is Patm = Patm à Ã‚ watergΆh where the Άh used is the value that corresponds with the throat. Therefore Pthroat = 99.206KPa For Dynamic Pressure, ( ½)à Ã‚ airVthroat2 = Patm Pthroat = 2.119KPa Results(Contd) For trial 2: Qideal = 0.01238 Qactual = 0.01153 The Venturi Coefficient, Cv, was calculated by using the values found for Qideal and Qactual and substituting them into equation (14). This value obtained was 0.92. To find the stagnation pressure, P = Patm and V = 0; the total pressure at this point is represented by P0 = Patm + ( ½)à Ã‚ airV2, however since V = 0 , the stagnation pressure is P0 = Patm. The Static Pressure is Patm = Patm à Ã‚ watergΆh where the Άh used is the value that corresponds with the throat. Therefore Pthroat = 96.871KPa For Dynamic Pressure, ( ½)à Ã‚ airVthroat2 = Patm Pthroat = 4.454KPa Discussion The two calculated Venturi Coefficients for both trials of differing flow rates were found to have close enough values to assume that said coefficients do not depend on the flow rate but rather on the Venturi meter in use. For ideal calibration methods, an average of values, 0.92 and 0.93 could be taken to compensate for ideal assumptions which have been determined to be inaccurate. This would aid the user to find actual values once ideal ones have been found. Although these values are not 1.0, they are relatively close. However despite this, it can be inferred that the idealistic conditions assumed at the beginning of the experiment are invalid as they do in fact incur a noticeable effect on the results creating an error. These assumptions included a one dimensional steady flow that existed in a frictionless environment; such implies no energy transfers. Dimensions for the outlet and inlet were assumed to be equal however if the graphs are reviewed, there are discrepancies and a certain amount of irregularities. These further outline the existence of friction and energy loss which can be observed through the comparison of tables 1 and 2 in the appendix where the values of experimental and ideal static pressures are defined. There was however another source of error that was introduced due to the faulty apparatus as was discussed in the Experimental Setup and Procedure section. Measurements were taken from a photograph to facilitate taking down said measurements from a fluctuating Venturi meter. Bernoullis equation states that when a fluid in flow undergoes a rise in pressure, then its velocity must decrease. Said concept also applies the other way around. Figure 1 in the appendix illustrates this through a rough sketch. Conclusion Venturi coefficients such as the ones calculated in this experiment, 0.92 and 0.93 imply that the actual flow is lower than the ideal flow. Therefore the ideal conditions that were applied only give an approximation to the actual flows. The coefficients can be averaged for a more accurate way to calibrate the Venturi meter. The values found imply that the Venturi meter relates the actual and ideal values relatively well; however this may be due to the fluctuating meters. Also very likely, is the presence of a relatively low amount of friction and symmetrical dimensions in the Venturi meter. References University, Carleton, ed. MAAE 2300 Course Manual. Ottawa, 2011. Print.

Financial Ratios for East Coast Yachts

Question 1: Financial ratios for East Coast Yachts: Current ratio| =| Current Assets| | | Debt-equity ratio| =| Total liabilities| | | Current Liabilities| | | | | Total equity| | =| $14,651,000 | | | | =| $19,539,000 + $33,735,000| | | $19,539,000 | | | | | $55,341,000 | | =| 0. 75| | | | =| 0. 96| | | | | | | | | | | | | | | | | Quick ratio| =| Current Assets – Inventory| | | Equity multiplier| =| Total assets| | | Current Liabilities| | | | | Total equity| | =| $14,651,000 – $6,136,000| | | | =| $108,615,000 | | | $19,539,000 | | | | | $55,341,000 | | =| 0. 44| | | | =| 1. 96| | | | | | | | | | | | | | | | Total asset turnover| =| Sales| | | Interest coverage| =| EBIT| | | Total Assets| | | | | Interest| | =| $167,310,000 | | | | =| $23,946,000 | | | $108,615,000 | | | | | $3,009,000 | | =| 1. 54| | | | =| 7. 96| | | | | | | | | | | | | | | | | Inventory turnover| =| COGS| | | Profit margin| =| Net Income| | | Inventory| | | | | Sales| | =| $117,910,000 | | | | =| $1 2,562,200 | | | $6,136,000 | | | | | $167,310,000 | | =| 19. 22| | | | =| 7. 51%| | | | | | | | | | | | | | | | | Receivables turnover| =| Sales| | | Return on assets| =| Net Income| | | Accounts receivable| | | | | Total assets| =| $167,310,000 | | | | =| $12,562,200 | | | $5,473,000 | | | | | $108,615,000 | | =| 30. 57| | | | =| 11. 57%| | | | | | | | | | | | | | | | | Debt ratio| =| Total assets – Total equity| | | Return on equity| =| Net Income| | | Total assets| | | | | Total equity| | =| $108,615,000 – $55,341,000| | | | =| $12,562,200 | | | $108,615,000 | | | | | $55,341,000 | | =| 0. 49| | | | =| 22. 70%| | | | | | | | | | | | | | | | | Question 2: | | East Coast Yachts| | Yacht Industry Ratios| | | | | Lower Quartile| Median| Upper Quartile| Current ratio| | 0. 75| | 0. 50| 1. 43| 1. 9| Quick ratio| | 0. 44| | 0. 21| 0. 38| 0. 62| Total asset turnover| | 1. 54| | 0. 68| 0. 85| 1. 38| Inventory turnover| | 19. 22| | 4. 89| 6. 15| 10. 89| Receivables turnover| | 30. 57| | 6. 27| 9. 82| 14. 11| Debt ratio| | 0. 49| | 0. 44| 0. 52| 0. 61| Debt-equity ratio| | 0. 96| | 0. 79| 1. 08| 1. 56| Equity multiplier| | 1. 96| | 1. 79| 2. 08| 2. 56| Interest coverage| | 7. 96| | 5. 18| 8. 06| 9. 83| Profit margin| | 7. 51%| | 4. 05%| 6. 98%| 9. 87%| Return on assets| | 11. 57%| | 6. 05%| 10. 53%| 13. 21%| Return on equity| | 22. 70%| | 9. 93%| 16. 54%| 26. 15%|The liquidity ratio shows that the company has less liquidity as compare to the whole industry. East Coast Yachts current ratio is below the median industry ratio and the quick ratio is positioned at the median industry ratio. This indicates that the company may access to short-term borrowing. Referring to the turnover ratio, all the three ratios, I. e. total asset turnover, inventory turnover and receivables turnover are higher than upper quartile industry ratio. This indicates that the company is more efficient among the whole industry in using its assets to generate sales.The financial levera ge ratios, which include the debt ratio, debt-equity ratio, equity multiplier and interest coverage, are all below the median industry ratio, but higher than the lower quartile. This shows that East Coast Yachts is having less debt than the other companies in the industry, but is still within the normal range. The profit margin, return on assets as well as return on equity of the company are higher than the industry median. This shows that the company’s profitability is performing well among the whole industry.As an overall, East Coast Yachts is performing well in the industry, while more concentration would only be required to be placed on the liquidity ratios. Question 3: Return on equity = 22. 70% Retention ratio (b)| =| Net income – Dividends| | | Net Income| | =| $12,562,200 – $7,537,320| | | $12,562,200 | | =| 40%| Sustainable growth rate (SGR) = Return on equity x Retention ratio = 22. 70% x 0. 4 = 9. 08% Increase in assets| =| Assets| x| ? Sales| | | Sal es| | | | =| $108,615,000 | x| (167,310,000 x 9. 08%)| | | $167,310,000 | | | | =| $9,862,242. 00 | | | | | | | |Increase in spontaneous liabilities| =| Spontaneous liabilities| x| ? Sales| | | Sales| | | | =| $6,461,000 | x| (167,310,000 x 9. 08%)| | | $167,310,000 | | | | =| $ 586,658. 80 | | | | | | | | Retention ratio (b)| =| Addition to RE| | | | | Net income| | | | =| $5,024,880 | | | | | $12,562,200 | | | | =| 40%| | | | | | | | Profit margin| =| Net income| | | | | Sales| | | | =| $12,562,200 | | | | | $167,310,000 | | | | =| 8%| | | | | | | | Increase in equity| =| PM x Projected sales x retention ratio| | =| 8% x ($167,310,000 x 1. 0908) x 0. 4| | =| $5,840,055. 94 | | | | | | | | External Funds Needed (EFN)| =| Increase in assets – Increase in spontaneous liabilities – Increase in equity| | =| $9,862,242. 00 – $586,658 – $5,840,056| | =| $3,435,527. 26 | | | | | | | | | | | | | East Coast Yachts| | | Pro forma Income Statement| | | Sales| | 182 ,501,748| | | Cost of goods sold| | 128,616,228| | | Other expenses| | 21,809,455| | | Depreciation| | 5,460,000| (Assume constant)| Earnings before interest and taxes (EBIT)| 26,616,065| | | Interest| | 3,009,000| (Assume constant)|Taxable income| | 23,607,065| | | Taxes (40%)| | 9,442,826| | | Net Income| | 14,164,239| | | Dividends| | 8,221,709| | | Addition to RE| | 5,481,139| | | | | | | | East Coast Yachts| | | Pro forma Balance Sheet| | | Assets| | | | | Current assets| | | | | Cash| | 3,318,214| | | Accounts receivable| | 5,969,948| | | Inventory| | 6,693,149| | | Total| | 15,981,311| | | Fixed assets| | | | | Net plant and equipment| | 102,495,931| | | | | | | | | | | | | Total assets| | 118,477,242| | | | | | | | Liabilities| | | | | Current liabilities| | | | | Accounts payable| | 7,047,659| | | Notes payable| | 14,265,482| | |Total| | 21,313,141| | | | | | | | Long term debt| | 33,735,000| | | | | | | | Shareholders' equity| | | | | Common stock| | 5,200,000| | | Retaine d earnings| | 54,693,803| | | Total equity| | 59,893,803| | | | | | | | Total liabilities and equity| | 114,941,944| | | | | | | | EFN| | 3,535,298| | | Current ratio| =| Current Assets| | Debt-equity ratio| =| Total liabilities| | | Current Liabilities| | | | Total equity| | =| $15,981,311 | | | =| $21,313,141 + $33,735,000| | | $21,313,141 | | | | 59,893,803 | | =| 0. 75| | | =| 0. 92| | | | | | | | | | | | | | |Quick ratio| =| Current Assets – Inventory| | Equity multiplier| =| Total assets| | | Current Liabilities| | | | Total equity| | =| $15,981,311 – $6,693,149| | | =| $118,477,242 | | | $21,313,141 | | | | $59,893,803 | | =| 0. 44| | | =| 1. 98| | | | | | | | | | | | | | | Total asset turnover| =| Sales| | Interest coverage| =| EBIT| | | Total Assets| | | | Interest| | =| $182,501,748 | | | =| $26,616,065 | | | $118,477,242 | | | | $3,009,000 | | =| 1. 54| | | =| 8. 85| | | | | | | | | | | | | | | Inventory turnover| =| COGS| | Profit margin| =| Net Income| | | Inventory| | | | Sales| =| $128,616,228 | | | =| $14,164,239 | | | $6,693,149 | | | | $182,501,748 | | =| 19. 22| | | =| 7. 76%| | | | | | | | | | | | | | | Receivables turnover| =| Sales| | Return on assets| =| Net Income| | | Accounts receivable| | | | Total assets| | =| $182,501,748 | | | =| $14,164,239 | | | $5,969,948 | | | | $118,477,242 | | =| 30. 57| | | =| 11. 96%| | | | | | | | | | | | | | | Debt ratio| =| Total assets – Total equity| | Return on equity| =| Net Income| | | Total assets| | | | Total equity| | =| $118,477,242 – $59,893,803| | | =| $14,164,239 | | | $118,477,242 | | | | $59,893,803 | | =| 0. 49| | | =| 23. 5%| | | East Coast Yachts| | | Original ratios| | Based on pro forma| Current ratio| | 0. 75| | 0. 75| Quick ratio| | 0. 44| | 0. 44| Total asset turnover| | 1. 54| | 1. 54| Inventory turnover| | 19. 22| | 19. 22| Receivables turnover| | 30. 57| | 30. 57| Debt ratio| | 0. 49| | 0. 49| Debt-equity ratio| | 0. 96| | 0. 92| Equity multiplier| | 1. 96| | 1. 98| Interest coverage| | 7. 96| | 8. 85| Profit margin| | 7. 51%| | 7. 76%| Return on assets| | 11. 57%| | 11. 96%| Return on equity| | 22. 70%| | 23. 65%| As noted from above, the liquidity and turnover ratio will remain constant assuming growth precisely at 9. 8%. Debt-equity ratio will decreased slightly while equity multiplier and interest coverage increased, assuming interest remain constant. Slight improvement also noted from profit margin, return on assets and return on equity. Question 4: Growth rate| | 20%| | | | | | | | Increase in assets| =| Assets| x| ? Sales| | | Sales| | | | =| $108,615,000 | x| (167,310,000 x 20%)| | | $167,310,000 | | | | =| 21,723,000. 00 | | | | | | | | Increase in spontaneous liabilities| =| Spontaneous liabilities| x| ? Sales| | | Sales| | | | =| $6,461,000 | x| (167,310,000 x 20%)| | $167,310,000 | | | | =| $1,292,200. 00 | | | | | | | | Retention ratio (b)| =| Addition to RE| | | | | Net income| | | | =| $5,024,880 | | | | | $12,562 ,200 | | | | =| 40%| | | | | | | | Profit margin| =| Net income| | | | | Sales| | | | =| $12,562,200 | | | | | $167,310,000 | | | | =| 8%| | | | | | | | Increase in equity| =| PM x Projected sales x retention ratio| | =| 8% x ($167,310,000 x 1. 2) x 0. 4| | | =| $6,424,704. 00| | | | | | | | External Funds Needed (EFN)| =| Increase in assets – Increase in spontaneous liabilities – Increase in equity| | =| $21,723,000. 0 – $1,292,200. 00 – $6,424,704. 00| | =| $14,006,096. 00| | | | | | | | | | | | | | | | | | East Coast Yachts| | | Pro forma Income Statement| | | Sales| | 200,772,000| | | Cost of goods sold| | 141,492,000| | | Other expenses| | 23,992,800| | | Depreciation| | 5,460,000| (Assuming constant)| Earnings before interest and taxes (EBIT)| 29,827,200| | | Interest| | 3,009,000| (Assuming constant)| Taxable income| | 26,818,200| | | Taxes (40%)| | 10,727,280| | | Net Income| | 16,090,920| | | Dividends| | 9,044,784| | | Addition to RE| | 6,029,85 6| | | | | | | | East Coast Yachts| | |Pro forma Balance Sheet| | | Assets| | | | | Current assets| | | | | Cash| | 3,650,400| | | Accounts receivable| | 6,567,600| | | Inventory| | 7,363,200| | | Total| | 17,581,200| | | Fixed assets| | | | | Net plant and equipment| | 112,756,800| | | | | | | | | | | | | Total assets| | 130,338,000| | | | | | | | Liabilities| | | | | Current liabilities| | | | | Accounts payable| | 7,753,200| | | Notes payable| | 15,693,600| | | Total| | 23,446,800| | | | | | | | Long term debt| | 33,735,000| | | | | | | | Shareholders' equity| | | | | Common stock| | 5,200,000| | |Retained earnings| | 60,169,200| | | Total equity| | 65,369,200| | | | | | | | Total liabilities and equity| | 122,551,000| | | | | | | | EFN| | 7,787,000| | | | | East Coast Yachts| | | Original ratios| | Growth @9. 08%| | Growth @20%| Debt-equity ratio| | 0. 96| | 0. 92| | 0. 87| Equity multiplier| | 1. 96| | 1. 98| | 1. 99| Interest coverage| | 7. 96| | 8. 85| | 9. 91| Profit margin| | 7. 51%| | 7. 76%| | 8. 01%| Return on assets| | 11. 57%| | 11. 96%| | 12. 35%| Return on equity| | 22. 70%| | 23. 65%| | 24. 62%| The growth rate of 20% indicates that the EFN is $7,787,000.Debt-equity ratio will decrease by 0. 05. The profit margin, return on assets and return on equity shows improvement if the expansion plan was taken up, assuming interest and depreciation remain constant. The further expansion may be taken up as it will bring improvement to the company’s profitability. Also, debt-equity ratio is still below 1 hence there is room for the expansion to be taken up. Question 5: Depreciation rate| =| Depreciation| | | | | PPE| | | | =| $5,460,000 | | | | | $93,964,000 | | | | =| 5. 81%| | | | | | | | Cost of new line| | 30,000,000| | |New depreciation charged| | 1,743,220. 81| | | | | | | | | | | | | East Coast Yachts| | | Pro forma Income Statement| | | Sales| | 200,772,000| (Assuming growth rate 20%)| Cost of goods sold| | 141,492,000| (Assuming growth rat e 20%)| Other expenses| | 23,992,800| (Assuming growth rate 20%)| Depreciation| | 1,743,221| | | Earnings before interest and taxes (EBIT)| | 33,543,979| | | Interest| | 3,009,000| (Assuming constant)| Taxable income| | 30,534,979| | | Taxes (40%)| | 12,213,992| | | Net Income| | 18,320,988| | | Dividends| | 9,044,784| | | Addition to RE| | 6,029,856| | | | | | | East Coast Yachts| | | Pro forma Balance Sheet| | | Assets| | | | | Current assets| | | | | Cash| | 3,650,400| | | Accounts receivable| | 6,567,600| | | Inventory| | 7,363,200| | | Total| | 17,581,200| | | Fixed assets| | | | | Net plant and equipment| | 141,013,579| | | | | | | | Total assets| | 158,594,779| | | | | | | | Liabilities| | | | | Current liabilities| | | | | Accounts payable| | 7,753,200| | | Notes payable| | 15,693,600| | | Total| | 23,446,800| | | | | | | | Long term debt| | 33,735,000| | | | | | | | Shareholders' equity| | | | | Common stock| | 5,200,000| | |Retained earnings| | 60,169,200| | | Total equity | | 65,369,200| | | | | | | | Total liabilities and equity| | 122,551,000| | | | | | | | New EFN| | 36,043,779| | | Existing EFN| | 7,787,000| | | Additional EFN| | 28,256,779| | | Depreciation charged from increase in fixed assets at SGR of 20% was $1,743,220. 81. The new plant would cost $30,000,000. The additional EFN would be $28,256,779. The total EFN would become $36,043,779. This would imply that the capacity utilization would be lower next year, since the new plant would expand capacity much more than the required under SGR.

19th Amendment to the Constitution

19th Amendment to the Constitution * Women gained the right to vote in 1920 in the 19th Amendment. Due to societal norms of the past, many women chose not to vote. The League of Women Voters was formed the same year to educate women about political issues and candidates, as well as encourage participation in the political process. One of the founders was the president of the National American Woman Suffrage Association, Carrie Chapman Catt. Read more: Roaring Twenties Political Events | eHow. com http://www. ehow. com/list_7794192_roaring-twenties-political-events. tml#ixzz1gYm7jWyN Sunday, William â€Å"Billy† 1862-1935 The Best-Known Evangelist in America. Billy Sunday entered the 1920s as the best-known revivalist in America. His great campaign in New York City in 1917 coincided with America's entry into the Great War, and in his sermons Sunday managed to fuse Christianity and American patriotism to the delight of millions. His success was even greater when he was able to c elebrate the death of his longtime enemy, â€Å"John Barleycorn,† with the adoption of Prohibition. He even attained some wealth, In 1920 Dun and Bradstreet estimated his worth at $1. million. Decline. However, the 1920s were not pleasant for Sunday and his wife. While he continued to attract large audiences and led thousands to hit the â€Å"sawdust trail† that led to the altars of the tabernacles he had put up for his revivals, these special buildings no longer went up in the largest cities of the North, and he found himself working medium-sized crowds. Economic Growth in the 1920s Despite the 1920-1921 depression and the minor interruptions in 1924 and 1927, the American economy exhibited impressive economic growth during the 1920s.Though some commentators in later years thought that the existence of some slow growing or declining sectors in the twenties suggested weaknesses that might have helped bring on the Great Depression, few now argue this. Economic growth ne ver occurs in all sectors at the same time and at the same rate. Growth reallocates resources from declining or slower growing sectors to the more rapidly expanding sectors in accordance with new technologies, new products and services, and changing consumer tastes. Economic growth in the 1920s was impressive.Ownership of cars, new household appliances, and housing was spread widely through the population. New products and processes of producing those products drove this growth. The combination of the widening use of electricity in production and the growing adoption of the moving assembly line in manufacturing combined to bring on a continuing rise in the productivity of labor and capital. Though the average workweek in most manufacturing remained essentially constant throughout the 1920s, in a few industries, such as railroads and coal production, it declined. Whaples 2001) New products and services created new markets such as the markets for radios, electric iceboxes, electric ir ons, fans, electric lighting, vacuum cleaners, and other laborsaving household appliances. This electricity was distributed by the growing electric utilities. The stocks of those companies helped create the stock market boom of the late twenties. RCA, one of the glamour stocks of the era, paid no dividends but its value appreciated because of expectations for the new company. Like the Internet boom of the late 1990s, the electricity boom of the 1920s fed a rapid expansion in the stock market.Fed by continuing productivity advances and new products and services and facilitated by an environment of stable prices that encouraged production and risk taking, the American economy embarked on a sustained expansion in the 1920s. Answer: Improve Positive effects- it created jobs, it created wealth, and it produced better living Negative effects- living conditions were bad, workers got seriously injured/killed, cities became crowded, and some countries tried imperialism Read more: http://wiki . answers. com/Q/What_were_the_positive_and_negative_effects_of_industrialization_between_1890_and_1920#ixzz1gYpL2o4R

How to Grow Color Change Crystals

If you enjoy growing crystals, try this simple project that produces large crystals that change color from yellow to green to blue depending on light and temperature.  The crystals grow over a few hours to overnight and are sure to amaze! Color Change Crystal Materials Two chemicals react to produce the color change in the crystals: 10 grams potassium alum (potassium aluminum sulfate)3 grams red prussiate [potassium hexacyanoferrate(III)]50 milliliters hot water Alum is easy to find, but youll likely need to order red prussiate online. Another option is to simply order a color change crystal kit. The one by Thames and Kosmos is reliable and includes a total of three experiments. Prepare the Solution and Grow Crystals In a small clear container, simply dissolve the potassium alum and red prussiate in 50 milliliters of hot water. It make take a few minutes for the salts to fully dissolve. If you still have undissolved material after a couple of minutes, you can carefully set your container inside another larger container of very hot water, to act as a hot water bath and help the salts dissolve.Once the chemicals are dissolved, set your container of chemicals in a location where the crystals can grow without being disturbed.Youll start to see tiny crystals after 30 minutes to a couple of hours. Crystal growth should be complete overnight to a couple of days, depending mostly on temperature and the humidity of the air. At this point, the crystals will be yellowish green or green, depending on the temperature at which they grew.When you are satisfied with the crystal growth, use a spoon to remove the crystals from the container. You can set them on a saucer to dry. Dispose of the chemical solution by pouring it down the drain and rinsing with water.The easiest way to observe the color change is to divide the crystals between two containers. Place one container in a dark cabinet or closet and put the other container on a sunny window sill.Check on your crystals each day. Over time, the crystals in the sunlight will change color from yellow to green to blue. The crystals in the dark will remain yellow. The color change could take a couple of days, but in my experience, you see it within an hour or two. When I took the photo, the crystal on the left was canary yellow, but darkened to yellowish green under the bright lights How Color Changes Crystals Work Light and heat supply the energy to cause  a chemical reaction between the alum and red prussiate to produce Prussian blue or Berlin blue. This is an iron-based dye still in use today for blue ink cartridges and paints. Make Prussian Blue InkUse Prussian Blue in a Crystal Garden Safety Information The chemicals used in this project are safe to use, but you should wash your hands after handling the crystals, because the red prussiate and your crystals contain iron, which can be toxic if you get too much. Keep the chemicals and crystals out of reach of pets and young children for this reason. The kitchen is a perfect place to mix the solution and grow crystals, but be careful you dont get burned by the hot water and be sure to keep the chemicals and crystals away from food. Rinse any kitchen cookware you use so it doesnt have chemical residue. More Chemicals That Grow Crystals