# Questions Asked onMarch 28, 2015

1. ## math

110 members of a sports club play at least one of the games, football, basketball and volleyball. If 20 play football and basketball only,15 play football and basketball only, 26 play basketball and volleyball only,x play all the three games, 2x each play

2. ## Physics

A particle starts from the origin at t = 0 with an initial velocity of 4.8m/s along the positive x axis.If the acceleration is (-2.5 i^ + 4.3 j^)m/s2, determine (a)the velocity and (b)position of the particle at the moment it reaches its maximum x

3. ## Math

A surfer drives his dune buggy out into the sand dunes.He follows his compass 10 miles due north and then turns due west. If he ends up approximately 35 miles from where he started how far west did he travel? a- 10 miles b- 25 miles c- 33.5 miles d- 35

4. ## Earth Space Science

the horizontal distance between a crest to the next trough of an ocean wave is 5 meters. what is the wavelength of the ocean wave? A)2 meters B)5 meters C)10 meters D)20 meters I think its 10 meters but im not so sure, I would like to make sure.

5. ## physics

A flat (unbanked) curve on a highway has a radius of 220m. A car rounds the curve at a speed of 25m/s. What is the minimum coefficient of friction that will prevent sliding?

2. Ferns are the most abundant of the _____ plants; and they produce _______ to reproduce. gymnosperm; sperm seedless vascular; spores* nonvascular; shoots vascular; seeds 3. Which of the following is a reason mosses never grow very tall? lack of cell

7. ## History :)

New England was a good starting place for American textile manufacturing for what reason? A)There were no ports within easy access. B)It was the birthplace of Frances Cabot Lowell. C)Rocky soil made the area inadequate for farming. *** D)Most manufacturing

8. ## COLLEGE CHEMISTRY HARD

calculate the ph at the equivalence point for the titration of 0.01 M Ch3COOH with 0.1 M NaoH ka= Ch3Cooh 1.8E-5 idek how to do it?

9. ## health part2

The sole activity of the respiratory system is breathing. True False The exchange of gases between the blood and tissue cells is external respiration. True False Air flows in the process of pulmonary ventilation because of pressure differences between the

10. ## math check

determine whether the given vector A in M22 belongs to the span (a1,a2,a3) where a1=[1 -1; 0 3] a2=[1 1; 0 2] a3=[2 2; -1 1] and A=[5 1; -1 9] so I set up an augmented matrix , but im not sure if I set it up correctly. I made a1 a2 and a3 into columns. 1 1

11. ## physics

An unstretched ideal spring hangs vertically from a fixed support. A 0.4 kg object is then attached to the lower end of the spring. The object is pulled down to a distance of 35cm below the unstretched position and released from rest at t=0s. A graph of

12. ## math

a statistics professor plans class so carefully that the lengths of his classes are uniformly distributed between 45.0 and 55.0 minutes. find the probability that a given class period runs greater than 50.75 minutes? find the probability of selecting a

13. ## Math

Simplify 6/sq root 3 +2 My answer is 12 - 6 sq root 3

14. ## physics

The gravitational force that the sun exerts on the moon is perpendicular to the force that the earth exerts on the moon. The masses are: mass of sun=1.99 × 1030 kg, mass of earth=5.98 × 1024 kg, mass of moon=7.35 × 1022 kg. The distances shown in the

15. ## physics

mercury rotates about its own axis once every 58.6 Earth days. a satellite orbits mercury once every murcurian day. how high is this satellite above mercury's surface? mass of mercury = 3.2x10^23 kg. the radius of mercury is 2400km.

16. ## Ethics in Technology

Which of the following laws was upheld as constitutional by the U.S. Supreme Court? A. Communications Decency Act B. Child Online Protection Act C. Child Internet Protection Act D. All of these laws were upheld as constitutional by the U.S. Supreme Court.

17. ## English 3

A fictional event ... Am I supposed to write about a real story that has happened in MY life ? Or make up a story ? Write a short story that tells about a fictional event in which a central conflict is - or is not.

18. ## mathematical physics

A series circuit consists of a resister with R = 200 ohm, an inductor with L = 1H, a capacitor with C = 0.002F, and a 12V battery. If the initial charge and current are both 0, find the charge and current at time t.

19. ## Trigonometry

Solve each equation, giving a general formula for all of the solutions: a. 2sin^2(x)-5 sin(x)-3=0 b. (cos(x)-((sqrt2)/2))(sec(x)-1)=0

20. ## Medical physics

1.A hypodermic needle of lenght 0.020m and inner radius 3.0 x10^-4 is used to force water at 20 degree celcious into the air at a flow rate of 1.0 x10^-7m^2 s-1 (a) what is the average velocity in the needle?(assume laminar flow), (b) what is the pressure

21. ## Project management

Build a PowerPoint ® presentation that will address each of the Project Management Areas of Knowledge, the process groups that use these areas of knowledge, and how the process groups interact with the knowledge area processes. Use table 3-1, Project

22. ## Medical physics

1.A hypodermic needle of lenght 0.020m and inner radius 3.0 x10^-4 is used to force water at 20 degree celcious into the air at a flow rate of 1.0 x10^-7m^2 s-1 (a) what is the average velocity in the needle?(assume laminar flow), (b) what is the pressure

23. ## physics

The gravitational force that the sun exerts on the moon is perpendicular to the force that the earth exerts on the moon. The masses are: mass of sun=1.99 × 1030 kg, mass of earth=5.98 × 1024 kg, mass of moon=7.35 × 1022 kg. The distances shown in the

Which of these is true? The nervous system doesn't react as quickly as the endocrine system. The endocrine system doesn't react as quickly as the nervous system. (My Answer) The nervous system and the endocrine system have similar reaction times. The

25. ## health part2

The sole activity of the respiratory system is breathing. True False The exchange of gases between the blood and tissue cells is external respiration. True False Air flows in the process of pulmonary ventilation because of pressure differences between the

26. ## physics

Calculate the net charge on a substance consisting of a combination of 6.7 ✕ 10^13 protons and 3.0 ✕ 10^13 electrons.

27. ## math fractions

which of the following pairs of numbers contains like fraction

28. ## Language art

In the multi-draft reading process, what does a reader look for in the second reading of a drama A. The theme of the drama B. How each scene moves a story forward C. When and where the action takes place D. The internal and external conflict

29. ## cda

The help of a computer program can help reduce the time that you as a director spend on payroll by as much as A. 75% B. 10% C. 50% D. 25% I am lost

30. ## Science NOT A QUIZ

1. __________ is/are NOT an angiosperm because it does not _______. (1 point) Barley; produce fruit Wheat; produce seeds* Lentils; produce cones Ginkgoes; flower 3. The leaves of plants ____, while the roots of plants _____. (1 point) make food; store

31. ## math

Mona has \$27.05 in quarters and dimes. There are 152 coins. How many quarters are there?

32. ## St. Michael

25ml of NaCl was mixed with 10ml of AgNO3. A precipitate was made. What is the theoretical yield? What is the limiting and excess reagent?

33. ## math

50 feet of fencing is used to create a rectangular fenced-in region. if the length of the region is x, express the width, w, as a function of x

34. ## college chemistry HARD

a solution containing 100.0 mL of 0.135 M CH3COOH (ka=1.8E-5) is being titrated with 0.54 M NaOH. calculate the ph: at the equivalence point and 5 mL past the equivalence point. how much is 5 mL past? i do not know how to do it?

35. ## science

I posted this under science because I see it occurring most under this subject. Many of the tutors here are very rude and useless at times. Honestly, if kids are on the internet seeking help for questions on their homework or whatever, they aren't going to

asked by You don't need to know
36. ## physics

A golfer imparts a speed of 25.8 m/s to a ball, and it travels the maximum possible distance before landing on the green. The tee and the green are at the same elevation. (a) How much time does the ball spend in the air? (b) What is the longest "hole in

37. ## Math

Find the exact value of the sine, cosine, and tangent of the angle 330 degrees. I know the tangent is -(square root 3)/3, but how?

38. ## physics

A criminal is escaping across a rooftop and runs off the roof horizontally at a speed of 4.6 m/s, hoping to land on the roof of an adjacent building. Air resistance is negligible. The horizontal distance between the two buildings is D, and the roof of the

39. ## Geometry

we have line QR parallel= to line ST, PQ = 8, QS = , and PT = 12. Find PR.

40. ## physics

A 46.2-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.566 and 0.440, respectively. What horizontal pushing force is required to (a) just start the crate moving and (b) slide the crate across the

41. ## physics

A cup of coffee is on a table in an airplane flying at a constant altitude and a constant velocity. The coefficient of static friction between the cup and the table is 0.420 . Suddenly, the plane accelerates forward, its altitude remaining constant. What

42. ## chemistry

What is the total concentration of cations in a solution made by combining 700.0 mL of 3.0 M (NH4)3PO4 with 300.0 mL of 2.0 M Na2SO4? numbers next to compounds are subscripts

43. ## physics

The steel I-beam in the drawing has a weight of 1.75 × 103 N and is being lifted at a constant velocity. The angles are at 70 degrees. What is the tension in each cable attached to its ends?

44. ## Math

A gardener is mowing a 20 by 40 yard rectangular pasture using a rectangular pattern. He mows from one corner of the pasture to the corner diagonally opposite. What is the length of this pass with the mower? Give your answer in simplified ,form. a- 10 sq

45. ## statistic

A statistics quiz consists of 10 multiple questions. There are four choices for each question. One student is unprepared and decides to guess the answers to every question. Assuming 70% is a passing grade, find the probability that the student will pass

46. ## Chemistry

A 1.500 mol sample of PCL5 dissociates at 160C and 1.00 atm to give 0.203 mol of PCL3 at equilibrium. What is the composition of the final reaction mixture?

47. ## mathematical physics

For any two vectors u and v show that : ( Vector u.vector v )^2 = [(vector u× vector v)×vector v ].vector u = u^2v^2

48. ## mathematical physics

Show that : vector del(r^2) = 2vector r

49. ## mathematical physics

Solve the initial value problem. d^2x/dt^2+2dx/dt-3x =0, x(2π) = 1, x(2π) = 13

50. ## mathematical physics

Show that :(I) u = e^xsiny is a solution of Laplace's equation. (ii) u = x^2+t^2 is a solution of the wave equation.

51. ## math

for f(x)=x^2+3 and g(x)=ãx find (f/g) (x) the domain (f/g)

52. ## mathematical physics

Separate the following partial differential equation into a set of three ODEs by the method of separation of variables: d^2u/dt^2 =c^2,[d^2u/dr^2+1/r du/dr+1/r^2 d^2u/d theeta^2]

53. ## mathematical physics

Obtain the temperature distribution u(x,t) in a literally insulated rod of length L if both ends on the road are kept at 0°c and the initial temperature distribution in the bar is: u( x, 0 ) = 6sin[πx/L]

54. ## Accounting

Stuck on a few questions from my Accounting class. If anyone can help; I would be really grateful! 32. Of the following accounts, which might appear in the adjusted trial balance, but not in the post-closing trial balance? A. income summary B. owner's

55. ## electromagnetism

A plastic rod is rubbed against a wool shirt, thereby acquiring a charge of -0.8micro colomb. Haw many electrons are transferred from the wool shirt to the plastic rod?

56. ## Math

A playground is shaped like a rectangle with a width 5 times it's length (t). What is the simplified expression for the distance between opposite corners of the playground? a- tsq root 26 b- 5t c- 26t squared d- 6t my answer is d 5t 5t+t =x x=6t

57. ## Maths

What is the simple interest for the loan \$500 with a 6% interest rate for 10years?

58. ## Ethics in Technology

Which of the following laws does NOT provide some sort of authorization for governmental wiretapping? A. Title III of the Omnibus Crime Control and Safe Streets Act B. Electronic Communications Privacy Act C. Federal Communications Act D. Communications

59. ## Trigonometry

Solve each equation on the interval [0, 2pi): a. 4sin^2(x)-3=0 b. cos(3x)=-1

60. ## Trigonometry

Solve each equation for theta, giving a general formula for all of the solutions: a. tan(theta)=-1 b. sin(theta/2)=1/2

61. ## Chemistry

A 1.0-g sample of MgCl2 produced a 10.00C increase in a calorimeter charged with 40.0mL of deionized water. The specific heat is of MgCl2 is 0.750J/C*g. What is the value of delta(s)H for MgCl2? I know that the formula needed is

62. ## chemistry

What mass of ammonium chloride must be added to a 0.500 L solution of 0.250 M ammonia to make a buffer with a pH of 9.26? Kb (NH3) = 1.8 × 10–5?

63. ## Trigonometry

Evaluate the expressions a. arctan(-(sqrt3)) b. Arctan(-(sqrt3)) and tell the difference between the two...

64. ## electromagnetism

An elctron starts at the position shown in Figure with an initial speed v=5000000m/s at 45^°to the X-axis the electric field is in the positive you direction and has a magnitude of 3500N/C on which plate and at what location will the electron strike?

65. ## electromagnetism

An elctron starts at the position shown in Figure with an initial speed v=5000000m/s at 45^°to the X-axis the electric field is in the positive you direction and has a magnitude of 3500N/C on which plate and at what location will the electron strike?

66. ## History

1) Why did the five powers directing the “Concert of Europe” from 1815-1823 believe they had a common interest in suppressing revolutionary activity across Europe? (Choose one) a. While differing in their constitutional make-up, all five agreed that

67. ## HARD COLLEGE CHEMISTRY

a solution containing 100.0 mL of 0.135 M CH3COOH (ka=1.8E-5) is being titrated with 0.54 M NaOH. calculate the ph: at the equivalence point and 5 mL past the equivalence point. how much is 5 mL past? i do not know how to do it?

68. ## Math

The first term of geometric is 124.the sum of infinity is 64.find the common ratio

69. ## Math

1. At midnight, you are 60 feet due north of Jonas. You run due east at ten feet per second. Jonas walks two feet per second due north. How many seconds after midnight is Jonas closest to you? What is the corresponding minimum distance separating you and

70. ## SUPER HARD CHEMISTRY

a solution containing 100.0 mL of 0.135 M CH3COOH (ka=1.8E-5) is being titrated with 0.54 M NaOH. calculate the ph: at the equivalence point

71. ## science

If a car has a constant acceleration of 4 m/s², starting from rest, how far has it travelled by the time it reaches the speed of 40 m/s?

calculate the molarity of cl- ions in a solution made from mixing 50.0 ml of a 0.100 m/l solution of ferric chloride with 50.0 ml of a 0.500 mol/l solution of ammonium chloride

73. ## Statistics

The percentage of various colors are different for the "peanut" variety of M&M's candies, as reported on the Mars, Incorporated website. Brown: 12% Yellow: 15% Red: 12% Blue: 23% Orange: 23% Green: 15% A 14-ounce bag of peanut M&M's is randomly selected

74. ## physics dicussion question

is there any physics teachers available to help right now?

75. ## physics

A golfer imparts a speed of 25.8 m/s to a ball, and it travels the maximum possible distance before landing on the green. The tee and the green are at the same elevation. (a) How much time does the ball spend in the air? (b) What is the longest "hole in

Calculate the concentration of I- in an aqueous solution prepared in a 250 ml volumetric flask from 50.0 ml of a 0.840 mol/L aluminum iodide solution and 160.0 ml of a 0.500 mol/L tin(IV) iodide solution.

77. ## cda

. Helping a child adjust to a child care facility is known as A. in loco parentis. B. orientation. C. parenting. D. involvement. My answer is D

78. ## French Grammar

Can someone please check these 4 sentences? a. La bibliothèque à New York est plus grande que la bibliothèque à Paris. b. Les résidences des New York sont plus moderns que les résidences de Paris. c. Le campus de New York est moins intéressant que

79. ## Body Systems II

Arteries carry blood ________ the heart.

80. ## physics

A golfer imparts a speed of 25.8 m/s to a ball, and it travels the maximum possible distance before landing on the green. The tee and the green are at the same elevation. (a) How much time does the ball spend in the air? (b) What is the longest "hole in

81. ## math

A different eight grader has been asked to work at the face painting booth every half hour. Use division to find how many eighth-graders are needed to work at the face painting booth during the fair. Show your work. I don't understand the division part,

82. ## Math questions

1. Shawn Fitzgerald finds a suitable property and agrees upon a selling price of \$137,900. The mortgage company requires a 20% down payment and Shawn chooses to finance the property for 30 years at 8%. What is the total amount of interest charged, rounded

83. ## geometry

In quadrilateral QRTS, we have QR = 11, QS = 9, and ST=2. Sides line RQ and line ST are extended past Q and S, respectively, to meet at point P. If PS = 8 and PQ = 5, then what is RT?

84. ## chemistry

a solution containing 100.0 mL of 0.135 M CH3COOH (ka=1.8E-5) is being titrated with 0.54 M NaOH. calculate the ph: at the equivalence point and 5 mL past the equivalence point. how much is 5 mL past? i do not know how to do it?

85. ## chemistry

calculate the ph at the equivalence point for the titration of 0.01 M Ch3COOH with 0.1 M NaoH ka= Ch3Cooh 1.8E-5 idek how to do it?

86. ## chemistry

calculate the ph at the equivalence point for the titration of .1 M NH3 and .1 M HCl. kb NH3= 1.8E-5 how you do it?

87. ## MATH

I am confused about the following problem. Could someone help me out? In a statistic class, the average score of midterm is 75 and the SD is 8. The average score of final is 65 and the SD is 12. The scatter diagram of the two variables (midterm/final

88. ## Math

In triangle ABC, points X and Z are on line AB and Y is on line AC such that line XY is parallel to line BC and line ZY is parallel to line XC. If AZ = 8 and ZX = 4, then what is XB?

89. ## Chemistry

Use half reaction to balance: CuS + NO3^- = Cu(NO3)2 + NO2 + SO2 S^2- = SO2 S Oxidized Cu^2+ + NO3^- = NO2 + Cu(NO3)2 N Red After balancing the atoms & balancing the charges, I cannot get all the correct coefficients

90. ## statistics

If I selected one player at random what would be the probability of an NBA player in the Eastern conference being less than 6 feet tall? First calculate the z-score and then use the standard normal table to find the probability.

91. ## chemistry

What is the formula for the following problem What is the kinetic energy, in joules of a mole of oxygen moving at a speed of 225m s ⁻1? Should I use KE= 1/2mv2 Thanks

92. ## phoenix

Select the approximate values of x that are solutions to f(x) = 0, where f(x) =- 8x2+5x+3. I don't know if i did it correctly but my answer is (1.00,-0.38

93. ## Science

which of these statements provides evidence to the fact that oceans influence climate by transporting water from one place to another? A)warm ocean water off the east coast of Florida affects the climate of Europe. B)warm ocean water off the east coast of

94. ## ss

which of the following inventions increased the availability of electricity in homes? a. telephone b. transformer c. reinforced steel d. linotype machine i think a kinda in a rush but i'll be patient. thank you in advance

95. ## Science Check Thank You

1. __________ is/are NOT an angiosperm because it does not _______. (1 point) Barley; produce fruit Wheat; produce seeds* Lentils; produce cones Ginkgoes; flower 3. The leaves of plants ____, while the roots of plants _____. (1 point) make food; store

96. ## rela 10H

requirenment for essay: Attention-grabber: Relevant quotation Create imagery to evoke imagination Fragment & general discussion Hypothetical question Who/what/when/where/why/how the mystery began (why is it mysterious?) Ask the question from the list of

97. ## chemistry

What is the total change in entropy when 10.0 g of ice melts at 25.0°C? DHfus = 6.01 kJ/mol The answer is 1.03 J/K but idk how to find it.

98. ## chemistry

dissolving 4.022 g of a salt in 100 mL of water changes temperature by -1.2^oC: what is the heat absorbed? The specific heat of water is 4.184 J/(g*C)

99. ## Chemistry

If 84.1 g of sodium hydroxide are reacted with 51.0 g of aluminum in the following equation: 2NaOH + 2Al + 2H2O --> 2NaAlO2 + 3H2 a) what mass of excess reactant remains? b) what mass of water would react?

100. ## Education/College level

Considering the pros and cons concerning electronic gaming make a case for or against the use of these educational games in the leaning environments. if I get ideas from others I must use a citation. Can you help me write teacher. I work in the prek

101. ## Math

Use Newton’s Method to approximate 3^(√7) to four decimal places. Use x1 = 2 as your seed. Round off intermediate iterates to five decimal place