# Questions Asked onJune 28, 2013

1. ## physics

A car is being pulled out of the mud by two forces that are applied by the two ropes shown in the drawing. The dashed line in the drawing bisects the 30.0° angle. The magnitude of the force applied by each rope is 2900 newtons (N). (a) How much force

2. ## Chemistry

Dinitrogen pentoxide, N2O5, decomposes by first-order kinetics with a rate constant of 0.15 s-1 at 353 K. (a) What is the half-life (in seconds) for the decomposition of N2O5 at 353 K? (b) If [N2O5]0 = 0.0579 mol·L-1, what will be the concentration of

3. ## Math

Find the area of a circle whose circumference measures 100 cm. Area (to the nearest square centimeter) = cm2 I plugged in everything C = 2 r C=2x3.14x100= 628

4. ## science

the block is acted upon by its W=200 lb, a horizontal force Q=600 lb, and the pressure P exerted by the inclined plane. The resultant R of those forces is up and parallel to the incline thereby sliding the block up it. determine P and R.

5. ## Calculus

Two cars start moving from the same point. One travels south at 60 mph and the other travels west at 25 mph. At what rate is the distance between the cars increasing 2 hours later? Let x = the distance covered by the south traveling car. Let y = the

6. ## physics

The Space Shuttle travels at a speed of about 5.45 x 103 m/s. The blink of an astronaut's eye lasts about 111 ms. How many football fields (length = 91.4 m) does the Space Shuttle cover in the blink of an eye?

7. ## Math

Compute the area of a triangle with a base of 15 cm and an altitude of 10.5 in. Area (to the nearest tenth) = cm2 I plugged everything into the area formula which is A = (1/2)bh . A=.5x15x10.5= I got 78.75 rounded 78.8. The computer keeps saying I am

8. ## trig

find the indicated vector. let u = (-9,1), v=(-5,9). Find 3u+v

9. ## Chemistry

When 0.13 g of H2 and 0.18 g of I2 are confined to a 150. mL reaction vessel and heated to 700. K, they react by a second-order process (first order in each reactant), with k = 0.063 L·mol-1s-1 in the rate law (for the rate of formation of HI). (a) What

10. ## statistics

Randomly selected cans of Coke are measured for the amount of cola in ounces. The sample values listed below have a mean of 12.18 ounces and a standard deviation of 0.118 ounces. Use DataDesk to find a 99% confidence interval for the mean volume of Coke in

11. ## Chemistry

Dinitrogen pentoxide, N2O5, decomposes by first-order kinetics with a rate constant of 0.15 s-1 at 353 K. (a) What is the half-life (in seconds) for the decomposition of N2O5 at 353 K? (b) If [N2O5]0 = 0.0579 mol·L-1, what will be the concentration of

12. ## trig

Write the complex number in trigonometric form, using degree measure for the argument. -12 - 16i

13. ## Physics

One hundred twenty grams of metal at 88 degree Celsius is poured into a 70 grams insulated cup contains 250 grams of water at 16 degree Celsius .The final temperature of the mixture is 17.5 degree C.Determine the specific heat capacity of the metal.

14. ## trig

Find the indicated roots. Write the answer in trigonometric form. Fourth roots of 256(cos 220° + i sin 220°)

15. ## Physics (Stress & Strain)

A steel bar has a rectangular cross section measuring 1.000cm by 2.900cm and is 8.700m in length. A load of 189000.00N causes the bar to extend 1.500mm. Calculate the stress and strain produced. ANS 1 = kPa (3 decimal places) ANS 2 = (6 decimal places)

16. ## Chemistry

How would you prepare 50.0 mL of 2.0 M H2SO4 starting with concentrated sulfuric acid (18M)?

17. ## Eng

When assembling a writing plan for an essay, which of the following should come first? A. The first section of the body of your essay. B. The general idea of your essay C. Material that catches the reader's interest. D. A brief Summary of your conclusion

18. ## Physics (Stress&Strain)

The Ultimate strength of a round steel rod is 630.000MPa. If a factor of safety of 5.000 is required, what is the maximum permissible load for the rod if it has a diameter of 3.000cm? ANS = kN (Round to 3 decimal places) Safety = 5.000 Rod diameter =

19. ## Chemistry

How would you prepare 50.0 mL of 2.0 M H2SO4 starting with concentrated sulfuric acid (18M)?

20. ## Physics(Stress&Strain)

What is the factor of safety of a steel hanger having an ultimate strength of 630.000MPa and supporting a load of 65000.000N. The steel hanger in question has a cross sectional area of 5.300cm. ANS = (Round to 3 decimal places) Load = 65000.000N ultimate

21. ## math

how do you factor this: 5p + 15q

22. ## Chemistry (How do I calculate)

Calculate the Molar Enthalpy of Neutralization (ΔHn) in kJ/mol of the reaction between a monoprotic acid and a monoprotic base, given the following information: The temperature change equals 6.92°C, 50.0 mL of 1.00 M concentration of Acid 50.0 mL of 1.00

23. ## math check

Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4, with n = 19

24. ## Calculus (help steve)

f(x)=−8x^3+6ax^2−3bx+4 has a local minimum at x=1 and a local maximum at x=3. If a and b are the local minimum and maximum, respectively, what is the absolute value of a+b?

25. ## VBA Programming

I'm trying to create a macro that asks for a loan between 1 dollar and 5 million, and returns different interest rates based on the amount of the loan. For some reason when I type in different loan amounts it automatically makes my rate ".1", when it

26. ## math

1/2 + (-5/6) =?

(1) should there be a comma before and after Bob Hopkins and per serving (2) Is Administrative Professionals Day capitalized (3)Any numbers corrections or any other punctuation mistakes THANKS!!!!! Your reservations are confirmed to cater your office party

28. ## Chemistry

The half-life for the second-order reaction of a substance A is 58.2 s when A0 = 0.63 mol L-1 Calculate the time needed for the concentration of A to decrease to the following values. (a) one-third of its original value (b) one-sixth of its original value

29. ## Chemistry

Determine the rate constant for each of the following second-order reactions. In each case, express your results in terms of the rate law for the loss of A. (a) 2 A B + 2 C, given that the concentration of A decreases from 2.74 mmol·L-1 to 1.46 mmol·L-1

30. ## Chemistry

Dinitrogen pentoxide, N2O5, decomposes by a first-order reaction. What is the initial rate of decomposition of N2O5 when 3.6 g of N2O5 is confined in a 0.77 L container and heated to 65°C? For this reaction, k = 5.2 x 10^-3 s-1 in the rate law (for the

31. ## Chemistry

Ethane, C2H6, forms ·CH3 radicals at 700.°C in a first-order reaction, for which k = 1.98 h-1. (a) What is the half-life for the reaction? (b) Calculate the time needed for the amount of ethane to fall from 1.00 10-3 mol to 2.48 10-4 mol in a 500. mL

32. ## Chemistry

The presence of a catalyst provides a reaction pathway in which the activation energy of a certain reaction is reduced from 125 kJ·mol-1 to 75 kJ·mol-1. (a) By what factor does the rate of the reaction increase at 293 K, all other factors being equal?

33. ## Chemistry

Determine the rate constant for each of the following first-order reactions. In each case, write the rate law for the rate of loss of A. (a) 2 A B + C, given that the concentration of A decreases to one-fourth its initial value in 57 min (b) 2 A B + C,

34. ## Eng

Because the subject of a composition is like a crystal with many facets, you should? A. offer a positive idea for every negative one. B. be very critical of your sources. C. pick one point of view and stay with it. C. offer your reader ideas from several

35. ## Math

How many square yards are in a room that measures 14 feet by 11.6 feet

36. ## Math

Hi! How do you simplify the following using the laws of exponents? 1. -2m^2 n^-3 /(mn^-2)^2 2. (-2pq)^-2 / 2pq^-2 For number 1, I don't have any idea but for number 2, I arrived at 1/2p. Is that right? Thanks much in advance.

Sam owns an acre of land on Red River. The government dams the river. A lake forms behind the dam, covering Sam's land. Does the government owe Sam anything? If yes why? If no why not?

38. ## Science Biochemistry

List 3 ways the production of energy from nutrients is regulated in the body.

39. ## math check

Find the critical value for the hypothesis test, given the following. (Give your answer correct to two decimal places.) Ha: ó1 > ó2, with n1 = 8, n2 = 10, and á = 0.025 F = 2.6 .

40. ## Eng

The most important difference between an outline and finished writing is the A. grammatical structure. B. details. C. order of events. D. sources of ideas Answer is A

Please check punctuation for periods and semicolons to make sure they are correct. This is a letter which we had to proofread (keeping same sentencing). Semicolons, for some reason, are difficult for me. THANKS AGAIN FOR YOUR HELP!! Dear Ms. Santiago You

42. ## geometry

if a scale factor of four is used, the points in the image will be eight times as far from the origin as at he pre-image points true or false

43. ## Spanish Help

1. Sí, sus padres ________ ; Ramón no debe ir a la escuela. A. está enfermo B. tienen razón C. son amables D. viven cerca de aquí I said B 2. ¿Prefieren Uds. una casa pequeña o una casa grande? _______ una casa grande. A. Prefiero B. Prefieres C.

44. ## accounting

How would you use the financial statement to determine when to the need for the purchase of inventory? Which statement(s) would you use?

45. ## trig

Convert the rectangular coordinates to polar coordinates, using radian measure for the angle. (6, -6) 6√(2),7π/4 OR -6√(2),5π/4

46. ## Excel

I have my employee schedule in a excel sheet. It is a weekly schedule that doesn't change week by week, but changes day by day within a week. Every Monday, Tuesday, etc. is the same schedule. In the file are days for Monday, Tuesday, etc.. I don't know if

47. ## Calculus

A television camera is positioned 2500 ft from the base of a rocket launching pad. The angle of elevation of the camera has to change at the correct rate in order to keep the rocket in sight. Also the mechanism for focusing the camera has to take into

48. ## chemistry

If Liquid A and Liquid B don’t mix, what would you guess about the liquids

49. ## geometry

Which of the following translations corresponds to the matrix ? a A segment is shifted 2 units up and 3 units to the left. b A triangle is shifted 2 units to the right and 3 units down. c A segment is shifted 2 units to the right and 3 units down. d A

50. ## Writing

SAT essay practice. Please grade,correct, and give feedback. We can succeed only by concert. It is not "Can any of us imagine better?" but " Can we all do better?" -Abraham Lincoln Assignment: The excerpt above argues that we can achieve only through

51. ## math

Sina+cosa=root over cosA

52. ## math

Sina+cosa=root over cosA

53. ## Math

In a survey of families in which both parents work, one of the questions asked was, "Have you refused a job, promotion, or transfer because it would mean less time with your family?" A total of 200 men and 200 women were asked this question. "Yes" was the

54. ## Math

Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = + x (ii) Graph this equation on a scatter diagram. (Do

55. ## Writing

This is the SAT essay practice. I wrote this in 25 minutes. Please give me feedback and make corrections. Grade me based on a scale of 1-6 ( 1 being poor and 6 being superior). "Only those who dare to fail greatly can ever achieve greatly." - Robert

56. ## VBA programming

How to get isnumeric function to display an "error" message when necessary. Sub DetermineinterestSelectCase() Dim loan As Variant Dim interest As Double loan = InputBox("Enter your desired loan amount, from 1 dollar to 5 million dollars.") Select Case loan

57. ## physics

A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 5.31 m/s. The car is a distance d away. The bear is 18.6 m behind the tourist and running at 8.01 m/s. The tourist reaches the car safely. What is the

58. ## chemistry

How many mL of 0.109 M Na2CO3 would be needed to precipitate all of the copper ions in 26.7 mL of 0.159 M CuSO4?

What does this poem mean and how does it relates to people decision. I need to write an essay about it. Whatever we do, whether we light strangers’ cigarettes—it may turn out to be a detective wanting to know who is free with a light on a lonely street

60. ## statistics

n youth corp have to stand in a row if all possible permutations;are equally likely. Fine the probability that 2 particular corp members stand side by side.

61. ## maths

a wheel revolves 360 degree revolution in one minute.Find how many radians will the wheel subtend in one second

62. ## Statistics.

A person apply for a job in two firms say X&Y, the probability of his been selected in firm X is 0.7, and been rejected in firm Y is 0.5. The probability of atleast 1 of his application been rejected is 0.6. What is the probability he will be selected in

63. ## english grammar

please give me some outlines on this topic - the government has granted a large amount of money to your school to build a hobby room and buy instruments for the school orchestra . why would you like to have the two in your school. please explain a few

64. ## Math

The digits 1,2,3,4,5,6 are arranged to form a 6-digit number.What is the probability that the number formed is divisible by 4?

65. ## Math

967x^3+567x^9?

66. ## chemistry

an iron rod embedded in ice placed in water beaker.what will be level of water when ice melts

67. ## Language barriers

Females are passive

68. ## Math

Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = 2.6,.1x Correct: Your answer is correct. . + Correct:

69. ## science

How to make a food web with at least 4 food chains showing how the eagles depends on other animals?

70. ## Math (Algebra)

Find the largest integer N for which N−6 evenly divides N^3−6.

71. ## Physics (Stress & Strain)

What is the factor of safety of a steel hanger having an ultimate strength of 550.000MPa and supporting a load of 79000.000N. The steel hanger in question has a cross sectional area of 7.000cm^2. ANS = (Round to 3 decimal places) ultimate strength =

72. ## Physics (Stress & Strain)

The ultimate strength of a steel rod is 550.000MPa. If the factor of safety of 3.000 is required, what is the maximum permissible load for the rod if it has a diameter of 4.100cm? ANS = kN (Round to 3 decimal places) ultimate strength = 550.000MPa Factor

73. ## trig

estimate the components of the vector. Round to one decimal place. [v] = 33.9, θ = 65.9° Find the horizontal and vertical components of v, and write in component form.

74. ## trig

Find the dot product a*b. a= (5,-9), b=(4,-3)

75. ## reproduction

why doesn't a women body reject the sperms since it is an external organism , instantly i.e, it should have produced the antibodies against it right?

76. ## Math

There are two points A=(2,0) and B=(4,0) and a moving point P=(t,t) on the xy-plane. If the minimum value of line AP+ line BP is b, what is the value of b^2?

77. ## trig

Use De Moivre's theorem to simplify the expression. Write the answer in a + bi form. [2(cos 240° + i sin 240°)]^5

78. ## statistics

comment on this statement "The mean loss for customers at the first State bank (which is not insured) was \$150.00 the standard deviation of the losses was -\$125.00"

79. ## trig

Solve the equation. Express your answer in trigonometric form. x^5 - 11 = 0

80. ## algebra 1

4x-4y=12 -7x+4y=-36 matrix

81. ## math

what would be the order from greatest to least 0.181, 0.38 , 0.139, 0.319 . any help would be appreciated. TY

82. ## Physics (Stress & Stain)

The ultimate strength of a steel rod is 600.000MPa. if the factor of safety 3.000 is required, what is the maximum permissible load for the rod if it has a diameter of 6.000cm? ANS = kN (Round to 3 decimal place) Ultimate strength = 600.000MPa =

83. ## Physics(Stress & Strain)

1) Calculate the tensile stress in a 33.000mm diameter rod subjected to a pull of 30.000kN. ANS= MPa (Round to 3 decimal places) Diameter = 33.000mm = 0.033m 30.000kN = 30000N Area = pi*d^2/4 = 3.1416 * 0.033^2/ 4 = 3.1416 *0.001089/ 4 = 0.0034212024/ 4 =