# Questions Asked onJune 12, 2010

1. ## Physics

A 1000 kg car pushes a 2000 kg truck that has a dead battery. When the drive steps on the accelerator, the drive wheels of the car push against the ground with a force of 4500 N. a) What is the magnitude of the force of the car on the truck? b) what is the

2. ## chemistry

write the overall, balanced molecular equation and indicate which element is oxidized and which id reduced for the following reactions. Include phase abbreviations. a) Mg(s)+Cr(C2H3O2)3(aq)--->? b) Cd(s)+AgNO3(ag)---->?

3. ## Chemistry

When heated, lithium reacts with nitrogen to form lithium nitride: 6Li+N2 --> 2Li3N What is the theoretical yield of Li3N in grams when 12.4 g of Li is heated with 33.9g of N2

4. ## chemestry

suppose two gases in a container have a total pressure of 1.20 atm.What is the pressure of gas B if the partical pressure of gas Ais 0.75 atm?

5. ## Chemistry

What volume of 0.123 M AgNO3(aq) is needed to form 0.657 g of AgCl(s)? 0.564 mL. 18.6 mL. 37.2 mL. 1.77 L.

6. ## Geometry Check

Which set of points are collinear? a.)A(-1,5); B(2,6); C(4,7) b.)A(0,0); B(1/2,3); C(1,5) c.)A(-4,-2); B(0,-4); C(2,-5) when i graph them they all look straight to me but the one I pick is A(-1,5); B(2,6); C(4,7)

7. ## Geometry HELP

Which set of points are collinear? a.)A(-1,5); B(2,6); C(4,7) b.)A(0,0); B(1/2,3); C(1,5) c.)A(-4,-2); B(0,-4); C(2,-5)

8. ## physics

If the borderline is tau equals zero,the eigen values are?

9. ## Algebra

2. A long distance phone company has a monthly fee of \$7.95 and charges a rate of \$0.05 per minute. Another long distance company has a monthly fee of \$9.95 and charges a rate of \$0.03 per minute. At how many minutes would the two companies have equal

10. ## math

if naomi wants to accumulate 1,000,000 by investing money every year into her savings account at 3% for 30 years until retirement,how much does she need to deposit each year

11. ## electric chem

A voltaic cell is made by placing an iron electrode in a compartment in which the Fe2+ concentration is 2.0 ´ 10-5 M and by placing a Pt electrode in the other compartment, in which the H+ concentration is 3.4 M and = 1.00 atm.

12. ## english parts of speech

choose the sentence that has a subject complement a. the nurse felt my pulse b. i felt much better c. the day ended with many surprises d. we can't leave without seeing her

13. ## calculus

Let g(x)=|cos x-1|. The maximum value attained by g on the closed interval [0, 2pi] is for x equal to A) -1 B) 0 C) pi/2 D) 2 E) pi I think its pi/2 but I'm not sure at all.

14. ## College Physics

A race driver has made a pit stop to refuel. After refueling, he starts from rest and leaves the pit area with an acceleration whose magnitude is 6.3 m/s2; after 3.6 s he enters the main speedway. At the same instant, another car on the speedway and

15. ## chemistry

A flask containing 5.00mL of 3 M HCl solution requires 14.45mL of 1.00 M NaOH for titration. How many moles of HCl are present in the solution? The density of 3 M HCl is 1.05g/mL

16. ## physics

A small toy car is moving around a circular path once in every 8 sec. The radius of track is 3m. find speed of car.

17. ## Algebra

Need help with these please--- 2. A long distance phone company has a monthly fee of \$7.95 and charges a rate of \$0.05 per minute. Another long distance company has a monthly fee of \$9.95 and charges a rate of \$0.03 per minute. At how many minutes would

18. ## French

I'm in grade 9, and my oral exam is coming up on monday. One of the possible questions involves knowing the plot of the textbook 'Sans frontieres 9e' that I had to return already. Specifically 'Selon toi, qui a commis le crime a\Logi-clique? Pourquoi?'

19. ## Chemistry

How much energy (in kilojoules) is released when 26.5g of ethanol vapor at 86.0C is cooled to -12.0C? Ethanol has mp = -114.5C , bp = 78.4C, delta H vap = 38.56 (KJ/mol) and delta H fus = 4.60 (KJ/mol) . The molar heat capacity is 113J/(K.mol) for the

20. ## Geometry HELP

1.)In the figure above, PQRS is an inscribed quadrilateral, and the measure of arc RSP=206º. What is mâˆ PST? a.)103º b.)206º c.)360º

21. ## Algebra

Solve. The population of a particular city is increasing at a rate proportional to its size. It follows the function P(t) = 1 + ke^0.12t where k is a constant and t is the time in years. If the current population is 15,000, in how many years is the

22. ## chemistry

Write an equilibrium constant expression for the chemical reaction of ammonia with water. (In this reaction assume that the concentration of water will remain constant)

23. ## Physics

What is the tension in the rope of this figure description? 60 kg person is hanging in the air on a rope attached to a pulley, with a 100 kg mass attached on other end that is touching the ground.

24. ## Art and Culture: Hellensitic Greece

What is the purpose of the Altar of Zeus in Pergamum? Who is responsible for paying for or commissioning the piece? How was it made? What is the meaning of this piece and what does it express or reveal about its creator? What aspects of the Hellenistic

25. ## geometry

In triangle abc, point B is on segment ab, and point E is on segment bc such that segment de is parallel to segment ac if db=2, da=7, de=3, what is the length of segment ac?

26. ## chemistry

This is a confusing one! How many faradays are required to convert a mole of NO2- ions to NH4+ ions? a. 4 b. 5 c. 6 d. 7 e. 8

You conduct a survey of a sample of 25 members of this yearï¿½s graduating marketing students and find that the average GPA is 3.2. The standard deviation of the sample is 0.4. Over the last 10 years, the average GPA has been 3.0. Is the GPA of this

28. ## chemistry

an organic sbstance has an enthalpy of vaporization of 29.0 kl/mol. the compound has a vapor pressure of524 mm HG at 25 C. at what tempurture is the vapor pressure equal to 115mm HG?

29. ## chemistry

Data obtained from lab (neutralization): H2SO4: C =1.0mol/l V = 30 mL Initial temp. = 24.1 NaOH c= 1.0mol/L v= 50 mL initial temp. = 23.9 Final temp. of H2SO4 & NaOH = 32.9 Assume specific heat capacity of both these substance is equal to water's = 4.19

30. ## Math

A television manufacturer makes console and wide-screen televisions. The profit per unit is \$125 for the console televisions and \$200 for the wide-screen televisions. Write the objective function that describes the total monthly profit. Write a system of

31. ## English

How do i write a thesis statement about greed for the novel The Lion, The Witch and The Wardrobe?

32. ## Geometry Help

1.) An isosceles triangle Î”ABC has its altitude at the y-axis and its base at the x-axis. D is the midpoint of segment AC and E is the midpoint of segment CB. Given the coordinates A(-2a, 0), B(2a, 0), and C(0, 2b), determine the coordinates of

33. ## CIS 105

As you have discovered, there are a variety of computers available, from the smallest computer in a domestic device to the supercomputers used in industry. Despite the different uses of computers, they all have basics elements in common—each computer

34. ## Physics

Two blocks of masses M and 5M are placed on a horizontal, frictionless surface. A light spring is attached to one of them, and the blocks are pushed together with the spring between them, as seen in the figure below:

35. ## Medical Terminology

You are a front office medical assistant. A second front office medical assistant is going to be hired, and you have been asked by the office manager to help her screen job applicants for the position. The office manager asks you to put together a short

36. ## statistics

A canidatate for governor of a certain state claims to be favored by at least half of the voters. If a hypothesis test is performed, how should you interpret a decision that rejects the null hypothesis? A. There is not sufficient evidence to reject the

37. ## Chemistry

The [H3O+] of a solution with pH = 3 is -10 M. 10 M. 1 x 10-3 M. 1 x 103 M. 1 x 10-11 M. Identify the acid(s) and base(s) in the following reaction: CH3COOH(aq) + NH3(aq) CH 3COO-(aq) + NH4+(aq) CH3COOH is the only acid, and NH3 is the only base. CH3COOH

38. ## chemistry

A sample of argon gas occupies a volume of 950 mL at 25.0°C. What volume will the gas occupy at 50.0°C if the pressure remains constant?

39. ## Algebra

Need help with these--- 30. Suppose the area of a square is x^2 - 6x + 9. What is the perimeter of the square? 33. Factor the expression: k^2 + k^f - 2f^2 38. Find the final amount of an investment if \$2,000 is invested at an interest rate of 8% compounded

40. ## Algebra

Solve. How long will it take for the population of a certain country to double if its annual growth rate is 1.5%? Round to the nearest year. Use the exponential growth model P(t) = P0e^kt.

41. ## managerial accounting

Accounting homework Gladmark company produces two types of get well cards scented and regular drivers for the four activities as follows: Scented Regular Inspection hours 40 160 Set up hours 50 50 Machine hours 200 600 Number of moves 225 75 1. Calculate

42. ## chemistry

A beaker contains 50.0 mL pf 0.953 M solution of a diprotic acid. How many grams of Mg(OH)2 are required to neutralize this solution?

43. ## Chemistry

A beaker contains 50.0 mL of 0.952 M solution of a diprotic acid. How many grams of Mg(OH)2 are required to neutralize this solution?

According to the National Association of Homebuilders, the average life expectancies of a dishwasher and a garbage disposal are about the same:10 years. Assume that their finding was basedon a sample of n1=60 dishwashers and n2 = 40 garbage disposals, and

45. ## algebra

The length of a rectangle is 1 cm longer than its width. If the diagonal of the rectangle is 5 cm, what are the dimensions of the rectangle in centimeters? Enter your answers in the blanks. Enter only the numeric values rounded to the nearest tenth.

46. ## Geometry Help

Out of 60 review questions I struggled with these ones. Someone please help!! 1.) The length of one side of a regular polygon is half the length of a similar polygon. What is the ratio of their areas? a.)1/2 b.)1/4 c.)1 2.)A patchwork quilt is made up of

47. ## Math

function y = 4-2(2t+pi/2), where t is measured in radians. A.choose one option which gives the value of the function when t=pi radians B.choose one option which gives the period of the function in radians. a)0 b)1 c)2 d)4 e)pi/4 f)pi/2 g)pi h)2pi

48. ## Math

Choose the three true statements from the following. Options A) The period of y =cosx is 90◦. B) The period of y =sinx is ð radians. C) The period of y =sin(2x) is four times the period of y =sinx. D) The period of y =sin(2x) is half of the period of y

49. ## science

4. Assignment: Photosynthesis and Cellular Respiration Powerpoint Energy acquisition is essential for all life. Whether the organism is classified as plant or animal, single-celled or multicellular, the exchange of energy and the formation of products

50. ## accounting

I need help wit Acc/225 week 2 and the exercise is 2-5 I have to do a T-account and Trial balance for Pose Pics and it is really confusing me

51. ## Geometry HELP

A soccer ball has diameter of 400 mm. A pin is stuck into the ball such that it creates the chord AC, which is 20 mm. What is the distance from the chord formed by the pin, and what is the length of EB? (Hint: CD=radius) a.)0.125 mm b.)0.5 mm c.)0.25 mm

52. ## Physics

The velocity of an object in simple harmonic motion is given by v(t)= -(0.275 m/s)sin(23.0t + 2.00π), where t is in seconds. 1) What is the first time after t=0.00 s at which the velocity is -0.100 m/s? 2) What is the object's position at that time? I

53. ## Algebra

Please help...Evaluate the logarithmic equation for three values of x that are greater than 1, three values of x that are between 0 and 1, and at x=1. Show your work. y=log7 x

54. ## Algebra

Is this correct? Rewrite as an equivalent exponential equation. Do not solve. log[8](64)=2 Answer= 8^2=64

55. ## English 10 HELP

out of 50 review questions I'm struggling with these. Someone please check/correct my answers! Look at the following pairs of sentences. Identify whether or not they are simple time relationships or cause-and-effect relationships. 1.)Clark was hammering a

56. ## psy 230

what influence does culture have on personality?

57. ## writing

i need some help with editing

58. ## algebra

how do you solve 3x-y=5 and =6x+2y=1 by substitution

59. ## chemistry

what is the basicity of H2S03

60. ## Sci

I want to do a science project like i am going to show two different ecosystem and predict and show which one is more polluted and what happens during global warming???? What my hypothesis going to be then??? Also.... What Future Refrences do I need To Get

61. ## Math

Using 3.14 for pi, rounding to the nearest tenth, if necessary. A spherical storage tank has a diameter of 48 ft and is full of water. How many delivery trucks with cylindrical tanks measuring 8 ft in diameter and 10 ft long can be completly filled from

62. ## Math

Choose the four true statements from the following. Options for Question 5 A )Two boxplots plotted ona commonaxis would be a good way of comparing the journey times for weekdays and weekends. B )Boxplots would show that the weekend times are more widely

63. ## Human Services

This is late can somebody look at my answers and tell me if they are correct? I have to choose one of the following: A. bandwagon—the idea that “everybody” does this or believes this B. categorical statements—stating something in a way that implies

64. ## Math

Objective Function z = 3x - 2y Constraints x > or equal to 1 x < or equal to 5 y > or equal to 2 x - y > or equal to -2

65. ## health

when would a Midsagittal plane be used. i know it is, but what type of xray would be taken

66. ## English

I have to have 5 sentences with different verb tenses, stating The role of education in successful finanical planning.

67. ## Intro to Finance

compare and contrast long- and short-term financing. Describe situations in which each type of financing would be used.

68. ## more math

1.) If c=12âˆš3 cm, then a=___ and b=___. 2.) A refrigerator has a width of 3 feet. The angle of elevation from the bottom corner to the opposite corner is 65º. What is the height of the refrigerator? 3.) In a 30-60-90 triangle, the shorter leg has

69. ## Geo (locus)

I don't fully get this stuff but some of these I guessed on and some I think I;m close so will someone check/ help me please? * is the answer I put 1. Point A is 0.5 cm from j. k and k are parallel and 1 cm apart. Find the locus of points that are 0.75 cm

70. ## Geometry HELP

In a rhombus, one diagonal has a length of 10 cm and the area is 120 cm2. Find the length of one side. a.)10cm b.)12cm c.)13cm

71. ## Math

: PROGRAM: PYTHAG : Prompt A, B :Fix 2 ã : (A2 +B2) ¨ C :Disp "C=",C : Float Choose the three true options concerning this program. Options A) The program can be used to find the length of the hypotenuse of a right-angled triangle. B) The program can

72. ## Math

Choose the one option which gives the length (in m, correct to 1 decimal place) of the diagonal of a rectangular field with sides 55m and 72m long. Options A 11.3 B 63.9 C 82.1 D 90.6 E 96.0 F 127.0

73. ## math

x^4+2x^2y-x^2+3y^2

74. ## Latin

When was "De rei publica" written? And what does each of the books describe?

75. ## geometry

. Graph the following functions. • y = 2x – 1 • y = (–3/4)x + 5 • y = x2 – 4 • y = –3x2 – 6x – 5

76. ## statistics

10 soldiers of 500 attempt to climb a 100Ft cliff, they fail in : 57 ft, 73, 81, 78,63,85,41,68,75,88. What is probability of soldiers successfully climbing the cliff?

77. ## Maths

Express the sum using summation notation: 1 - 1/2 + 1/3 - 1/4 + 1/5 - ... (to 3n terms) If I'm doing this right so far, with k=1 (the number on bottom of the sigma), the equation after the sigma would be ((-1)^(k+1)) / k I'd be able to figure out the term

78. ## algebra

The equation C=mx+b can be used to model the monthly cost, C, of a cell phone plan where b is the flat monthly cost, m represents the cost in dollars per minute and x is the number of minutes used in the month. Choose a flat monthly rate and cost per

79. ## Soccer

Yeeeeeha! The US tied Great Britian!!!! And that's the answer!

I am having a vocab quiz soon and I need to know the meaning of the following! Thanks for all the help! - poignant - adversity - quaver - wanton - cacophony - narcissism PS: Please don't give me the link to dictionary sites, I've already tried that and I

81. ## Algebra

Is this answer correct? Express as a single logarithm: log[2](6)+log[2](13) Answer= log[2](78)

82. ## math

A tractor manufacturing company machines axles to extremely small tolerances. The main power axles have a mean diameter of 3.0000 inches and a standard deviation of 0.0050 inch. What is the probability that a given axle will have a diameter between 2.9915

83. ## math

Suppose that the U.S. Senate consisted of 60 Republican and 40 Democratic senators. How many different 10-person committees could be formed with 6 Republican senators and 4 Democratic senators?.

84. ## Algebra

Is this correct? Express as a single logarithm. log[x](14)-log[x](2) Answer= log[x](12)

85. ## CUltural Diversity

Native Americans who are employed are less likely to be managers, professionals, technicians, salespeople or administrators. is this true or false?

86. ## Intermediate Algebra

Express as an equivalent expression, using the individual logarithms of w, x, y, and z. log(a)(1x^2y^5)

87. ## Algebra

20. Solve: 5x^2 - 10x = 0 50. (x-1)(x^3 + x^2 + x) =? Thanks -MC

88. ## geometry

angle equals a half arc sine of gravity over velocity squared equals?

89. ## Physics

The hamiltonian shows you that the energy levels are purtered by the electric fields.The form of the matrix,you can see?

90. ## PHY

Steps of the scientific method

91. ## albebra

I do not understand how to find x on a graph when there is no equation. I have the possible answers: a) x= -3, b) x=-1, c) x=5, d) x=1 It asks me to find the value of x when y is 5; however, the graph I have has a line (0,2) on the y axis and on the x axis

92. ## Algebra

50. (x-1)(x^3 + x^2 + x) =? Thanks -MC

93. ## gegraphy

the native people originally come from? the name of the ethnic ground that settles in the praires? the porcess that formed the rocky mountains and appalachians? the most valuable catch in the pacific? the most eastern and western physiographic region? the

94. ## Math

I have no clue what this means. Can someone explain this to me. Evaluate t^1

95. ## math

1.) What is the square of âˆš10? 2.) Find tan 14. 3.) Find cos 45. some one told me to use a scientific calculator and it would give me the answer but i can't find my calc.

96. ## Algebra HELP:(

I do not understand how to find x on a graph when there is no equation. I have the possible answers: a) x= -3, b) x=-1, c) x=5, d) x=1 It asks me to find the value of x when y=5

97. ## English

why did the Virginia Woolf had such a revolutionary impact on so many writers?

98. ## Math

What is the simplified sum when you evaluate 10/15 + 1/4

99. ## Math

Calculate the average mathematical gradient of a slope that rises 450m over a horizontal distance of 1.8 km.

100. ## Geography

Do you know an example where secondary effects of lithospheric hazards are more serious than the hazard itself?