fatima

Most popular questions and responses by fatima
1. Physics

a 2.5kg block initially at rest on horizontal surface. A horizontal force F of magnitude 6N and a vertical force P are the applied to the block. The coefficients of friction for the block and surface are Ms=0.4 and Mk=0.25.Determine the magnitude of the

2. chemistry

In a certain experiment a student finds that the PHs of 0.10 M solutions of three potassium salts KX, KY, and KZ are 7.0, 9.0, and 11.0, respectively. Arrange the acids HX, HY, and HZ in order of increasing acid strength.

3. physisc

A force in the +x-direction with magnitude F(x)=18.0N−(0.530N/m)x is applied to a 7.40 kg box that is sitting on the horizontal, frictionless surface of a frozen lake. F(x) is the only horizontal force on the box.If the box is initially at rest at x=0,

4. chemistry

What is the mass, in grams, of 7.40×1020 molecules of caffeine, C8H10N4O2

5. chemistry

In a group 1 analysis, a student adds hydrochloric acid to the unknown solution to make [Cl-] = 0.15 M. Some PbCl2 precipitates. Calculate the concentration of Pb2+ remaining in solutions.

6. chemistry

Which best describes the transition from gas to liquid?

7. chemistry

2. Imagine you have two beakers. Both beakers are filled with the same amount of water. The water in both beakers is the same temperature as well. You add 50 g of Substance A to the first beaker, and 50 g of Substance B to the second beaker. After stirring

8. chemistry

A certain reaction is spontaneous at 72˚C. if the enthalpy change for the reaction is 19Kj/mol, what is the minimum value of ΔS (in J/K•mol) for the reaction?

9. Economics

Which one of the following statements about capital flight is correct? A. Capital flight refers to the tendency of developing countries to overinvest in commercial aircraft. B. Capital flight refers to developing countries' citizens accumulating or

10. math6

shaunti drove 621miles in 11.5 hours.wht was her average speed in miles per hour?

11. French

Hi there, can you see if i have translated the following english sentences correctly in french. Summary : (At the beginning of his journey, the little prince finds himself near asteroids 325, 326, 327, 328, 329, and 330, and he decides to visit each one.)

12. government

Wtat is legitimate government? Outline any four features of legitimacy? What is simple majority sysyem? Outline four demeits of the system

13. economics

In which phase of the business cycle will the economy most likely experience rising real output and falling unemployment rates? A. Peak B. Recession C. Expansion*** is my answer D. Trough

14. math

natasha had 7/8 gallon of paint. her brother ivan took 1/4 gallon to paint his model boat. natasha needs at least 1/2 gallon to paint her bookshelf. did ivan leave her enough paint?

15. english

What information supports the idea that food should not be left out overnight?

16. chemistry

How many moles of O2 are produced when 0.300mol of KO2 reacts in this fashion?

17. Physics

A long cylindrical insulator has a uniform charge density of 1.0 #C/m3 and a radius of 9.0 cm. a) What is the electric field inside the insulator at a distance of 4 cm? b) What is the electric field at 17 cm? c) How much work must you do to bring a q =

18. Chemistry

Oxalic acid is a relatively strong diprotic acid with Ka1 = 5.6 ´ 10-2 and Ka2 = 5.1 ´ 10-5. What is the oxalate ion, C2O42-, concentration in a 0.10 M oxalic acid solution? a. 0.052 b. 0.073 c. 0.10 d. 5.6 ´ 10-2 e. 5.1 ´ 10-5

19. chemistry

A scientist is performing an experiment on a powder. Which of the following is a sign that a chemical change has definitely occurred during his experiment? The powder catches on fire. The powder releases bubbles. The powder heats up. The powder breaks

20. Maths

Colin walked a distance of 15 miles in 6 hours Work out Colin's average speed Give your answer in miles per hour

21. Economics

Which one of the following statements about the World Bank is correct? A. The World Bank provides gold for developing countries that want to go on the gold standard. B. The World Bank provides short-term loans to developing countries that are incurring

22. english

Read the paragraph below and complete the cause-and-effect chart. Erosion is a natural process. During the erosion process, soil and rocks are worn away by the elements. Most erosion results from a combination of several factors, including heat, cold,

23. Maths

A garden has a small rectangular lawn surrounded by a flower-bed of equal width. The lawn measures 5 metres by 12 metres and the flower-bed has a width of x metres. Write an expression for the area of the garden and flower-bed

24. physics

"a drag racing car starts from rest at t= 0 and moves along astraight line with velocity given by V = bt^2 where b isconstant. The expression for the distance traveled by this car from its position at t = 0 is a)bt^3 b)bt^3/3

25. chemistry

If one mole of hydrocarbon contain 4g of hydrogen and it molar mass is 40g.what is the homologous series of the compound

26. Economics

Which one of the following statements about efficiency wages is correct? A. An efficiency wage is a "wage" that contains a profit-sharing component as well as traditional hourly pay. B. An efficiency wage is an above-market wage that minimizes a firm's

2cosx=3^1/2

28. Economics

When most consumers and firms reduce spending only because they expect other consumers and firms to reduce spending, and a recession results, A. a self-correction has occurred. B. an adverse aggregate supply shock has occurred. C. a coordination failure

29. Economics

The public debt is the amount of money that A. Americans owe to foreigners. B. state and local governments owe to the federal government. C. the federal government owes to holders of U.S. securities. D. the federal government owes to taxpayers. I chose C

30. Chemistry

A solution that is formed by combining 400. mL of 0.20 M HNO3 with 600. mL of 0.10 M NaOH has an H3O+ concentration of a. 0.20 M. b. 0.10 M. c. 0.060 M. d. 0.020 M. e. 5.0 ´ 10-13.

31. Economics

Which one of the following statements is correct under the theory of supply-side economics? A. High marginal tax rates severely discourage work, saving, and investment. B. Transfer payments increase incentives to work. C. Increases in social security taxes

T1/2(Ra-226) = 1602 years What is the activity of 1 gram of Ra-226? Give the answer in Ci and Bq? What would be this activity after 1T1/2 and 5T1/2? Someone please help me with this question.

33. Science fair

PLEASE HELP MS.SUE. I really need your help I'm in 3rd grade and I have to do a science fair project. I'm planning on doing the science fair project about making hot water freeze. Is it a good idea if not can you give me some ideas? And if it is then can

34. math

y= 2sin(2x-pi/4) find amplitude, period, phase shift, assymptote and graph

35. Maths

A give an example of a function whose domain equals the set of real numbers and whose range equals the set? the set {-1,0,1} BGive an example of a function whose domain equals (0,1)and whose range equals [0,1] C.Give n example of a function whose is the

36. physical scince

answer the following question: QUESTION 4: What does it mean if a compound has a solubility of 15g in 100g of water at 0 degrees Celcius? A) 100 g of the compound will dissolve in 15 g of water at 0 degrees celcius B)15 g of the compound will dissolve in

37. microeconomics

Market demand is given as QD = 200 – 3P. Market supply is given as QS = 2P + 100. Each identical firm has MC = 0.5Q and ATC = 0.25Q. What quantity of output will a typical firm produce? a.10 b.20 c.30 d.40

38. precalculus check immediately

suppoe f is a function with domain [1,3]and range[2,5]? define functions g and h by g(x)=3f(x)and h(x)=f(4x) what is domain and range of g what is domain and range of h I solved it and got it like this domainof g=[1,3]and range of g=[3,9] Domain of

Please check urgently .I have to submit the assignment A give an example of a function whose domain equals the set of real numbers and whose range equals the set? the set {-1,0,1} BGive an example of a function whose domain equals (0,1)and whose range

40. Math

Shelly delivers the weekly local paper to neighborhoods in her town. House numbers are even on one side of the street and odd on the other. Shelly delivers an equal number of papers to both sides of the street. Although she always aims for the front

41. physics

A particle moves along the x-axis from an initial position xi to a final position xf. Of the following values of xi and xf, which results in a negative displacement? (a) xi = 6 m, xf = 4 m (b) xi = ?4 m, xf = ?2 m (c) xi = ?4 m, xf = 2 m (d) xi = 4 m, xf =

42. chemistry

How many moles of HNO3 are present in 34.0 mL of a 4.70 M solution of nitric acid?

43. algebra

Please help me anybody Abby Garland is parked at a mile marker on an east -west country road.She decides to toss a fair coin 10 times ,each time driving 1 mile east if it lands heads up and 1 mile west if it lands up tails up. The term random walk applies

44. physics

how do green plants produce food

45. art

Which artistic value is least apparent in Mannerist paintings? A. Serptentine curves B. Dramatic lighting C. Elegance D. Refined style I think my answer is C

46. Economics

Which one of the following is an example of direct foreign investment? A. General Motors building an auto production facility in China B. The purchase of debt issued by the Panamanian government C. A U.S. bank granting a loan to a Guatemalan firm D. A U.S.

47. Chemistry

what mass in grams of sodium hydroxide is produced if 20.0g of sodium metal reacts with excess water according ro the chemical equation, Na(s)+H2O4->naoh(aq)+h2(g)

48. Science fair

PLEASE HELP MS.SUE. I really need your help I'm in 3rd grade and I have to do a science fair project. I'm planning on doing the science fair project about making hot water freeze. Is it a good idea if not can you give me some ideas? And if it is then can

49. math

Find the maximum and minimum values of the given objective function on the indicated feasible region. M = 150 − x − y

50. physics

If two stones projected from the same point with the same speed but at angles pi/3 and pi/6 respectively have their ranges R₁ and R₂ then a)R1=2R2 B)R1=R2 C)R1=5R2 D)R1=25R2

52. science

a particle is projected vertically upward with the velocity u m/s and after t(s) another particle is projected upwards from the same point and with the same initial velocity. proof that the particle will meet after a lapes of (u/g + t/2)seconds from the

53. precalculus

Precalculus-------Give an example of three functions f,g,h none of which is a constant function such that? fog=foh but g is not equal to h. I tried with many functions but not getting like f=x g=1+x then h=?or any other example so that we get fog=foh

A.give an example of a function whose domain is {3,4,7,9}? and whose range is {-1,0,3} B.Find two different functions whose domain is {3,8}and whose range is {-4,1} C Explain why there does not exist a function whose domain is {-1,0,3} and whose range is

55. Math

The owner of a large company is conducting a survey about job satisfaction, including questions about salary, hours, stress, and other conditions. There are about 800 employees in the company, including 100 executive positions, 650 middle-management

56. Mathematics

A motorist do does the first part of his journey at an average speed of 54km/h. Then he increases the speed to 60km/h for the rest of the journey. If he travels 225km in 4 hours, what is the distance traveled for the rest of his journey? show clear steps.

57. college

Positive charge is distributed throughout a long non-conducting cylindrical shell of inner radius R and outer radius 2R. At what radial depth beneath the outer surface of the charge distribution is the electric field strength equal to one-half the surface

58. Economics

The international agency that lends money to developing countries for economic development projects is the A. World Credit Union. B. World Bank. C. International Monetary Fund (IMF). D. World Trade Organization (WTO). my answer is B

59. Math

A recipe for 2 dozen cookies calls for 1 1/3 cups of flour how much flour would be needed to make 5 dozen cookies

60. Math (Word Problem)

An open gift box is to be made from a square piece of material by cutting four-centimeter squares from the corners and turning up the sides. The volume of the finished box is to be 576 cubic centimeters. How to find the size of the original piece of

61. english

write a analogy paragraph "the process of reading a good book"

62. chemistry

In an experiment, 6.700g of hydrogen sulfide is fully decomposed into its elements.If 0.396g of hydrogen is obtained in this experiment, how many grams of sulfur must be obtained?

63. science

a particle ia projected upward with a velocity of u m/s and after an interval of t(s) anoda particle is projected upward from the same point and wit the same initial velocity.proof dat they will meet at a height of (4u^2/8g-g^2t^2/8g)

64. Pre calculus

Precalculus-------Give an example of three functions f,g,h none of which is a constant function such that? Precalculus-------Give an example of three functions f,g,h none of which is a constant function such that? foh=goh but f is not equal to g I tried

65. precalculus

give an example of two increasing functions whose product is not increasing

66. Physics

The problem goes like this... You are pushing a shopping cart at a constant speed. The handle makes an angle of 30.0 degrees with the horizontal and the friction in the cart has a coefficient of 0.400 to account for all the axles, etc. The mass of the cart

67. chemistry

120g of sodium hydroxide pellets dissolve in 800cm3 of its solution. Determine the mass concentration of the solution

68. Science

The density of aluminum is 2.7 the volume of a piece of aluminum if it mass 8.1 grams?

69. Physics

Suppose a boy walks a displace of 3km east wards yo à point and then walks another 6km west wards what is his displacement from his starting point

70. Math

determine the value(s) of k which the equation x^2+kx+9=0 will have a) two real roots b) 2 distinct roots I tried to find the discriminant but I didn't get the right answer.

71. math

Suppose you are managing an account in which you deposit Rs. 20,000 at the end of each year for 20 years. How much amount you have accumulated with the assumption that you earn 5% interest compounded annually.

72. math

Ali needs to borrow Rs 500,000 for three years. Which of the following option is more beneficial for him? (i) 3.2 % simple interest rate (ii) 1.6% compound interest rate when it is compounded semi annually

73. physics

a body moves in a straight line with initial velocity and uniform acceleration.find how far it travels in12s,given that it travel 246m in the 1st 6seconds,and 69m in the last 3seconds.find also the initial velocity.

74. physics

a body moves in a straight line with initial velocity and uniform acceleration.find how far it travels in12s,given that it travel 246m in the 1st 6seconds,and 69m in the last 3seconds.find also the initial velocity.

75. physics

a particle is travelling in a straight line with constant acceleration.it covers 6m in the fourth second and 7m in the fifth second.find its acceleration and initial speed.

76. Linear algebra

Show that the origin is the only equilibrium point of the system? X=ax+by Y=cx+dy Wherea,b,c and d are constants, with ad-bc not aqual to 0(zero) Please show me how to do this problem Please show me the work

77. Math

1. What is a ratio? a. What is the difference between a ratio and a fraction? b. What are the similarities between ratios and fractions? c. Remember that order is important! d. How do you simplify ratios?

78. Precalculus plese check urgent

Give an example of a function whose domain is{3,4,7,9} and? whose range is {-1,0,3} plese give me the trick of finding such functions Is this answer coreect the function must only consist of individual points: {(3, -1), (4, 0), (7, 3), (9, 0)} is an

79. precalculus

show that the sum of two increasing functions is increasing

Please check urgently .I have to submit the assignment A give an example of a function whose domain equals the set of real numbers and whose range equals the set? the set {-1,0,1} BGive an example of a function whose domain equals (0,1)and whose range

81. english

Write a paragraph about the country you chose to present. The paragraph should have an introduction and conclusion and explain why you chose the country, what you found most interesting, information that surprised you and any other relevant

82. physics

A 95 g tennis ball is traveling at 106 km/h when it bounces of a wall and travels in the opposite direction it came from at a speed of 88 km/h. a. Determine the impulse on the ball if the. (don’t forget that it is a vector) b. If the average force

83. chemistry

calculate the volume of amonia that is produced at stp when 10.5 grams of N2 reacted with excess H2.

84. history

discuss the america 'third world counteroffensive' from 1979- 1989. was this in retospect, beneficial for the united states and the world in general?

85. economics

Can someone explain the monetary system and the fiscal policy

86. physic

A particle of mass 10kg Move in a circular orbit of ratio 2cm with a linear velocity of 0.2m/s calculate the angular velocity, the frequency and the centripetal force

87. chemistry

what is the mass of bromine contains the same number of atoms of 50.0 g of iodine? my work: 50g/79.5g= .628 mol(Br) 50g/126g=.394 mol(I)

88. Chemistry

How many kJ is released when 3.4 mol of water is frozen?

89. economic

which policy will be favorable for the consumers (buyer of the cars only) of Pakistan.

90. university of minnesota

Find the maximum and minimum values of the given objective function on the indicated feasible region. M = 150 − x − y

91. Math

Joan ran for 2.25 hours burning 3075.5 calories per hour how many total calories does he burn

92. accounts

People from all over the world moving from sole proprietorship to partnerships due to the numerous benefits they get. You are required to tell why the focus is shifting from sole proprietorship to partnership? Explain your answer with the help of at least

93. Finance

ABC Company is engaged in the manufacturing of electronic equipment. The Company has reported net loss for the year 2013 but its Cash Flow Statement is showing a positive net cash flow. Being a student of Business Finance, you are required to discuss

94. English

Write a letter to the editor or a speech calling for a change that you would like to see in your community and reference the three works as evidence that non-violence and civil obedience are an effective method for affecting change Using these sources -

95. english

use these five words given below and write a essay 120 to 140 words 1.family 2 television 3 entertainment 4 mother 5 day time

96. physics

a body moves in a straight line with initial velocity and uniform acceleration.find how far it travels in12s,given that it travel 246m in the 1st 6seconds,and 69m in the last 3seconds.find also the initial velocity.

97. science

a particle moving in a straight line with constant acceleration passing over distances x,y,z in equal consecutive interval of time(t).find the relation between x,y and z..and the acceleration of the body.

98. Precalculus

give an example of two decreasing functions whose product is increasing

99. precalculus

Suppose f is an even function and g is an odd function such that the composition fog is defined.d show that fog is an even function