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A person's center of mass is easily found by having the person lie on a reaction board. A horizontal, 2.9- m-long, 5.9 kg reaction board is supported only at the ends, with one end resting on a scale and the other on a pivot. A 61 kg woman lies on the reaction board with her feet over the pivot. The scale reads 30 kg. Part A What is the distance from the woman's feet to her center of mass? Express your answer with the appropriate units. d= 1.427 m Submit Previous Answers Request Answer Provide Feedback ? * Incorrect; Try Again; One attempt remaining Next >

A person's center of mass is easily found by having the person lie on a reaction board. A horizontal, 2.9- m-long, 5.9 kg reaction board is supported only at the ends, with one end resting on a scale and the other on a pivot. A 61 kg woman lies on the reaction board with her feet over the pivot. The scale reads 30 kg. Part A What is the distance from the woman's feet to her center of mass? Express your answer with the appropriate units. d= 1.427 m Submit Previous Answers Request Answer Provide Feedback ? * Incorrect; Try Again; One attempt remaining Next >

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter10: Rotation Of A Rigid Object About A Fixed Axis

Section: Chapter Questions

Problem 10.5OQ: Suppose a cars standard tires are replaced with tires 1.30 times larger in diameter. (i) Will the...

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58. A retired partner from a large brokerage firm hasone million dollars available to invest in particularstocks or bonds. Each investment’s annual rate ofreturn depends on the state of the economy in thecoming year. The file P09_58.xlsx contains thedistribution of returns for these stocks and bonds asa function of the economy’s state in the coming year.As this file indicates, the returns from stocks andbonds in a fair economy are listed as X and Y. Thisinvestor wants to allocate her one million dollars tomaximize her expected value of the portfolio oneyear from now.a. If X 5 Y 5 15%, find the optimal investment strategy for this investor. (Hint: You could try a decisiontree approach, but it would involve a massive tree.It is much easier to find an algebraic expression forthe expected final value of the investment whena percentage p is put in stocks and the remainingpercentage is put in bonds.)b. For which values of X (where 10% , X , 20%)and Y (where 12.5% , Y , 17.5%), if any,…
The solar panels are placed in an optimal position such that they receive a solar power of 1186kWh/m^2 per year1. The average solar cell has an efficiency of 20% and an average household in the Netherlands uses 2990kWh of electricity per year. The average solar panel has dimensions of 165x99cm. How many solar panels do you need?
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When budgets are administered thoughtfully, which of the following is true? O Budgets are a substitute for the planning and coordination efforts of management. O Performance evaluation subjectivity can be eliminated. O Uncertainty faced by the company can be eliminated O The use of budgets promotes coordination within the subunits of a company. Question 2 Participative budgeting helps: O decrease deviations from the budget O create demanding but achievable budget O secure communication of sensitive information O generate greater employee commitment towards the budget
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Learning Goal: To understand the meaning and the basic applications of pV diagrams for an ideal gas. As you know, the parameters of an ideal gas are described by the equation PV = nRT, where p is the pressure of the gas, V is the volume of the gas, n is the number of moles, R is the universal gas constant, and T is the absolute temperature of the gas. It follows that, for a portion of an ideal gas, Figure 3po 2po Po pV T 51 = constant. 6: Vo 2V 3V V 1 of 1 ▼ Calculate the work W done by the gas during process 1-2-6-51. Express your answer in terms of po and Vo. W = 4po Vo Submit ✓ Correct This result can be obtained either by calculating the area of the region 1265 or by adding the amounts of work done by the gas during each process of the cycle. The latter method helps verify that the net work done by the gas is, indeed, positive. As discovered earlier, The work W15621 done during a process 1-5-6-2-1 is equal to -W12651, the work done during the reverse process 1-2 →65 →1. Part G…
Learning Goal: To understand the meaning and the basic applications of pV diagrams for an ideal gas. As you know, the parameters of an ideal gas are described by the equation PV = nRT, where p is the pressure of the gas, V is the volume of the gas, n is the number of moles, R is the universal gas constant, and I is the absolute temperature of the gas. It follows that, for a portion of an ideal gas, Figure 3po 2po Po pV T 51 Vo = constant. 6 2V 3V V Submit ✓ Correct No work is done during a process, if the gas does not experience a change in volume. The absolute value of the work done by the gas during a cycle (a process in which the gas returns to its original state) equals the area of the loop corresponding to the cycle. One must be careful, though, in judging whether the work done by the gas is positive or negative. One way to determine the total work is to calculate directly the work done by the gas during each step for the cycle and then add the results with their respective…
Learning Goal: To understand the meaning and the basic applications of pV diagrams for an ideal gas. As you know, the parameters of an ideal gas are described by the equation PV = nRT where p is the pressure of the gas, V is the volume of the gas, 72 is the number of moles, R is the universal gas constant, and T is the absolute temperature of the gas. It follows that, for a portion of an ideal gas, One can see that, if the amount of gas remains constant, it is impossible to change just one parameter of the gas: At least one more parameter would also change. For instance, if the pressure of the gas is changed, we can be sure that either the volume or the temperature of the gas (or, maybe, both!) would also change pV To explore these changes, it is often convenient to draw a graph showing one parameter as a function of the other. Although there are many choices of axes, the most common one is a plot of pressure as a function of volume: a pV diagram. 3po In this problem, you will be asked…
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h: Find each of the following values Vmax, T, F, Vrms, Vdc if V = 200sin (340t) hin - хешл