1. physics

Using Newtons second law of motion if the force on an object is 20N, and its mass is 5g, what is it's acceleration? A=F/M A=20N/5g now I'm not sure what to do. Can someone please help?

2. statistics

The average electric bill in a residential area is \$72 for the month of May. The standard deviation is \$6. If the amounts of electric bills are normally distributed, find the probability that the mean of the bill for 15 residents will be less thatn \$75

3. algebra

I have a math worksheet and it is SO confusing. can anyone help. the question on the worksheet is IN MUSIC WHAT DOES "ALLEGRO" MEAN? it's page 190. PPPPLLLLLLLLZZZZZZZZ. like right now i need the answer. i looked it up on google what allegro means and it

4. Math

What is the approximate surface area of the sphere? C= 37.68 km

5. Physics Help!!

A passenger on an interplanetary express bus traveling at v = 0.94c takes a seven-minute catnap by his watch. How long does the nap last from your vantage point on a fixed planet?

6. Chemistry

What volume of 0.716M KBr solution is needed to provide 10.5g of kBr?

7. Math

A spinner is divided into 20 equal sections and are numbered 1 through 20. What is the probability of the spinner's pointer landing on section 5?

8. chemistry

6.0mol of ammonia gas is injected into a 3.0 mol L container. at equilibrium 1.5 mol of hydrogen gas is found in the container. the number of moles of ammonia gas left in the container must be which of the following?

9. Calculus

The region R is a rectangle with vertices P(a,lna), Q(a,0), S(3,0), and T(3,lna), where 1

10. mathematics - sinusoidal curves

Owen is jumping on a trampoline. When his feet hit the deck of the trampoline, the material depresses to a minimum height of 2cm. On average, Owen is reaching a maximum height of 200cm every 10 seconds. Determine the equation of a sinusoidal function that

11. English

i have to put carl sandburg's poetry definitions in thematic statements telling what poem be? it have to be tagged. Poetry is a projection across silence of cadences arranged to break the silence with definite intentions of echoes, syllables, wavelengths.

12. English

Poetry is the journal of a sea animal living on land, wanting to fly the air. i not understand what he mean

13. CALCULUS

The region R is a rectangle with vertices P(a,lna), Q(a,0), S(3,0), and T(3,lna), where 1

14. Nutrition

Read this summary and then answer the questions. This is Tyler's freshman year in college, and he has been earning good grades and performing well in his part-time job. However, Tyler's eating habits have been poor, and has gained a few pounds. His

15. Physics

A -10 mC charge experiences a force of 75 N directed south. What is the electric field magnitude and direction at the location of the charge? If this charge is removed and not replaced, what is the electric field magnitude and direction at the location it

16. mathematics - sinusoidal curves

The propeller of a boat at dock in the ocean will rise and fall with the waves. On a particularly wavy night, the propeller leaves its resting position and reaches a height of 2m on the peaks of the waves and -2m in the troughs. The time between the peak

17. Calculus

The strength of a beam with rectangular corss-section is directly proportional to the product of the width and the square of the depth (thickness from the top to bottom of the beam). Find the shape of the strongest beam that can be cut from a cylindrical

18. ENGLISHH 12

"The Rime of the Ancient Mariner" is famous for its use of vivid figurative language and memorable sound devices. What do you think are several especially effective examples of simile, metaphor, personification, alliteration, assonance, and internal rhyme?

19. chemistry

the equilibrium system shown below was analyzed and the concentrations of HI(g, and I2(g) were found, in mol/L, to be 4.4, 3.2, 1.5 respectively. the equilibrium constant must be which f the following? H2(g) + I2(g) 2HI(g) + 65KJ

20. phyics

during a process, 21.6 MJ of heat is added to closed system. if the internal energy is increased by 59.6 MJ, how much work in Btu was done? is the work done on ro by the system?

21. Calculus

Determine if the planes in each pair are parallel and distinct or coincident. a) 5x - 2y + 4z = 7 5x - 2y + 4z = -3 b) 7x - 3y - z = 9 21x - 9y - 3z = 27

22. Calculus

Explain why a line in three-space cannot be represented by a scalar equation.

23. physics

during a process, 21.6 MJ of heat is added to closed system. if the internal energy is increased by 59.6 MJ, how much work in Btu was done? is the work done on ro by the system?

24. algebra ll

Need help please.. Identify -7x^3+6x^2+6x+9 Searching for the degree of the first term, 2nd term, 3rd term, 4th term and the degree of the polynomial? I thank you

25. Calculus

Explain why a line in three-space cannot be represented by a scalar equation.

26. Geometry

The base of the prism is a rectangle with sides 13 m and 5 m in length. Find the lateral surface and surface area of the given prism.

27. Math and Society

Which solid has the greatest volume? a)A right cylindrical cylinder with a radius of 4 inches; b)A cube with a side of length of 4 inches; or c) a sphere with a radius of 4 inches?

28. Physics

What is the electric field at a distance of 2 cm from 11 mC of negative charge? 2cm converts to 0.02 meters

29. geometry

The surface area of a cone is 38 in^2. The radius of a similar cone is triple the radiusof the orginal cone. What is the surface area of the new cone?

30. English

Cry, the Beloved Country refers at various points to the fear that exists in South African society. According to the novel, what are the causes of this fear and what are the consequences of this fear? Include evidence from the novel to support your

31. physics

a father pulls hi children in a wagon for 25 minutes covering 1.25 miles on a level sidewalk. he pulls with an average force of 35 lbf at an angle of 45 degrees to the sidewalk. (a) how much work is done (in ft.lbf)? (b) what is the average horsepower

32. Physics 121

The disk has mass 10kg and radius 0.25m. The rod has mass 5kg, length 0.5m and radius 0.05m. The rod is split down the middle and is hinged so that its two halves can lay flat against the disk. Suppose that the disk and rod are initially rotating at

33. Physics 121

The pulley has an inner radius of 0.35m and an outer radius of 0.65m. It has a mass of 1.8kg. A string wrapped around the inner part of the pulley is fastened to the ceiling. A second string wrapped around the outer part of the pulley is fastened to a

34. Chemistry

Explain the Hyberdaization scheme for the central atom&the molecular geometry of CO2.

35. physics

A 8.01-nC charge is located 1.95 m from a 4.06-nC point charge. (a) Find the magnitude of the electrostatic force that one charge exerts on the other. (b) Is the force attractive or repulsive?

36. phi103

need a thesis statement on abortion

37. Physics 121

Two block are connected by a rope that runs over a pulley. The block on the tables has mass 4kg, the hanging block has mass 2kg, and the pulley has mass 0.5kg and radius 0.25m. Assume that the table is friction-less. If the block are released from the

38. geometry

The coordinates of point A on triangle ABC are (2, -4). What would be the image of point A after triangle ABC is reflected over the y-axis andthen rotated about the origin 180 degree?

39. Chemisty

A 0.5-L saturated solution of silver chloride, AgCl, is evaporated to dryness. The residue is equivalent to 1.4 x 10^-3 mole. Calculate the experimental value of the Ksp of silver chloride. Show all of your work.

40. Biochemistry

Explain how an animal that persists on a diet composed of 90% protein, 7% fat, and 3% carbohydrate utilizes food of this composition to maintain itself and grow

41. calculus(related rates)

Water is leaking out of an inverted conical tank at a rate of 12200 cubic centimeters per minute at the same time that water is being pumped into the tank at a constant rate. The tank has height 15 meters and the diameter at the top is 6.5 meters. If the

42. Art

Does "top up the phone" mean put money on your account? Can you give me an example, Writeacher? I need to include two or three more sentences on mobile phones, Writeacher. Could you please help me? 1) Parents have to shoulder responsibility for their

43. Math

In 2004, your family bought a new car for \$15,000. Each year the value of the car is decreasing approximately 15% per year. Your father plans to keep the car 5 years before he buys another new car. What will be the value of the car when he's ready to

44. Maths-Help needed!!!

Compare the graphs f(è)=sinè and f(è)=sin(-è). f(è)=cosè and f(è)=cos(-è). What conclusions can you make?

Can anyone please explain these problems to me?? I really need help!I need to simplify these trig expressions but I don't understand how my teacher is doing it at all and I have a quiz on this tomorrow! I've really been trying but I just don't get it!

46. College algebra

A circular vent pipe with a diameter of 5.5 inches is placed on a roof that has a slope of 1/4. Find an equation of the ellipse that should be cut from the roof so that the pipe will fit. Round parameters to the nearest hundredth.

47. statistics

a set of maths exame score mean is 70 and variance is 8. a set of english score has mean is 74 and variance is 16. for which exame whould a score of x=78 have a higher standing?

48. Decision modeling

A forest fire is buring down a narrow valley 3 miles wide at a speed of 40 feet per minute. The fire can be contained by cutting a firebreak through the forest across the valley. It takes 30 seconds for one person to clear one foot of the firebreak. The

49. hw

the presidential election of 1876 was decided by the house of representatives

50. chem

show why ka(kb)=kw for this pair of conjugate acid-base: H2C6H6O6 and HC6H66 ^-1

51. math

Can someone help me do this? I need to find the domain of this equation: x - 3 = 2√11-2x

52. Chemistry

During the phase of condenstion, is heat being absorbed from surroundings or released into surroundings! I think it is being released into surroundings! Thanks

53. College algebra

A fountain in a shopping mall has two parabolic arcs of water intersecting. The equation of one parabola is y = -0.25x^2+2x and the equation of the second parabola is y=-0.205x^2+4x-11.75. How high above the base of the fountain do the parabolas intersect?

54. College algebra

An architect wishes to design a large room 122 feet long that will be a whispering gallery. The ceiling of the room has a cross section that is an ellipse whose foci are to be located 14 feet to the right and the left of center. Find the height h of the

55. physics

Assignment 3-3 A mass M2 (including the pulley and hanger) is balanced by two equal masses M1 (including the hanger) acting as shown in the diagram below. (a). Derive a formula for angle θ that produces perfect static equilibrium. (b). Given that, M1 = 15

56. Physics

The electric potential energy of an object at point A is known to be 60 J. If it is released from rest at A, it gains 20 J of kinetic energy as it moves to point B. What is its potential energy at B?

57. Physics/Chemistry

Does an electroscope losing its charge by being grounded violate the law of conservation of charge?

¿Te gustaría quedarte en una pensión o en un hotel? ¿Porque? Me gustaría quedarme en una pensión porque una pensión es menos cara que un hotel.

59. chemistry

1-Barium sulfate and strontium sulfide both are placed into beaker of water. a- Will the strontium sulfide dissociate? ....... - If it does,write the equation showing the dissociation.

60. math algebra trig

For the graph of each function, find an equation of the line of symmetry and the coordinates of the vertex. Tell whether the value of the function at the vertex if a maximum or a minimum: a) y = -x^2 + 4x - 7; b) y = 2x^2 + 4x; c) y = -3x^2 - 18x + 5.

61. geometry

the top of a giant slide is 30 ft off the ground. the slide rises at a 30 degree angle. to the nearst whole foot, what is the distance down the slide?

A bus moving with speed 0.93c is 65 feet long according to its passengers and driver. What is its length from your vantage point on a fixed planet?

A box weighing 65.0 N rests on a table. A rope tied to the box runs vertically upward over a pulley and a weight is hung from the other end. Part a) Determine the force that the table exerts on the box if the weight hanging on the other side of the pulley

64. Algebra

b=2, c+ sqrt of 13. Trying to find the length of the 3rd side. It is a right triangle with A on top, 2 on the right side and the sqrt of 13 on the left.

65. Algebra

If the side of a square are lengthened by 7cm, the area becomes 225cm^2. Please help me find the length of the original side! Thank you

66. financial accounting

If a \$6,000, 10%, 10-year bond was issued at 104 on October 1, 2011, how much interest will accrue on December 31 if interest payments are made annually

67. Math

The bus stations in Trawlwy and Fenton are 220 miles apart. A bus left Trawley for Fenton at 9:00am. Traveling at 40 miles per hour. One hour later, an express bus left Fenton for Trawley traveling along the same road at 50 miles per hour. At what time did

68. Calculus

Does the line [x,y,z] = [-2,6,5] + t[3,2,-1] lie in the plane 3x - 4y + z + 25 = 0 ? Please show work.

69. Chemisrty

How many L of carbon dioxide gas will be produced from the decomposition of 5.0g of sodium hydrogen cardonate?

70. math

I would really appreciate it, if someone helped me how to do this. │x-4│ - │7-x│ = 1

71. phi 103

Which of the following may not qualify as a falsifiable claim? Student Answer: Your luck will improve. Your house will be sold tomorrow. Granite is more dense than sand. Smoking may cause heart disease

72. Health

Foundations Of A Healthy Lifestyle PF answers.

73. CHEMISTRY

if the [H] of a solution at 25degrees is 1.7*10^-4 mol/L, calculate the [OH] in mol/L, the PH, and the pOH?

74. algebra-trig help asap

An isosceles triangle has a base 36 cm long and a base of 65 degrees. Find its perimeter. I'm not sure if this is right but my answer is 1250.4 in^2

75. math

1) Describe the similarities and differences between hyperbolas and ellipses. 2) List the properties of a hyperbola that allow you to sketch its graph.

76. algebra-trig help asap

Write an equation I'm not sure how to do this though. The sine of x with an amplitude of 4, period of 3(pie) and phase shift to the right of pie/4

77. algebra

find all the zeros of each function. 1. f(x)=2x^4-13x^3-34x^2+65x+120 2. f(x)=4x^4+19x^2-63

78. Statistics

For this assignment you are to imagine that you are part of a select marketing group. This select group has been asked to consider the Colorado City Convention and Visitors Bureau survey of 25 hotels in the local area. The survey is concerned with the

79. United States History

the least controversial actions of president bush regarding? a. war in iraq b. hurricane katrina c. immigration reform d. economic crisis of 2007-2009 e. "no child left behind" educational program I think the answer is E?

80. algebra 2

factor x squared+ 8x+3

81. algebra 2

factor x cubed-12y squared + 32y

82. Finite Math

In August 2008, General Motors was offering the choice of a 2.9% loan for 36 months, or \$2000 cash back on the purchase of a \$30,000 Pontiac Grand Prix. (a) If you take the 2.9% loan offer, how much will your monthly payment be? \$_________ (b) If you take

83. Chemistry

I took 25 mL of an unknown weak acid and added it to 10 mL of NaOH solution. I measured the pH and got 2.88 with concentration of NaOH @ .0098 and weak acid at 0.0102. What is pKa for the acid?

84. English

Please fix this sentence: As I was reading the Bible, I became interested in the book of Psalms and its idea of spreading the teachings of God through song.

85. Biochemistry

Explain how an animal that persists on a diet composed of 90% protein, 7% fat, and 3% carbohydrate utilizes food of this composition to maintain itself and grow.

86. College algebra

Find the standard form of the equation of the hyperbola with the given characteristics. Foci:(+4,0) or (-4,0) Asymptotes: y=4x or y=-4x.

87. English

help me finish the sentence? "I enjoy writing and the privilege of having me intern here is a _______?"

88. physics

A body is projected so that on its upward path it passes through a point x meters and y meters vertically from the point of projection. Show that if R is the range on the horizontal through point of projection the angle of elevation is

89. science

a metallic cube of mass M and dencity D is kept on a table .find the pressure on table.

90. Algebra

Find the variation constant and an equation of variation where Y varies directly as X and Y=60 when X=10 k=variation constant y=equation of variation Still do not understand..please..

91. Algebra

1.Solve 2x = 5x2 for x. A. 2.322 B. 0.431 C. 0 and 2.322 D. 0 and 0.431 2.Which of these is a factor of 2x100 − x7 − 1? A. x B. x − 2 C. x + 1 D. x − 1 3.If P(x) is a polynomial with P(–6) = –1.12 and P(–5) = 0.6 then which of the following

92. english

If your baby does not like cold apple juice, make it heated.

93. Law

In law we watched a movie called 12 angry men , and there is a question I am stuck on, any help would be great! How does the film 12 angry men deepen our understanding of the guarantee of the right to trail by jury and the role of the jury system in

94. Accouting

How much investment per dollar of expected annual operating savings can a company afford if the investment has an expected life of 8 years and its required rate of return is 14%?

95. algebra

haley read less than twice as many books as her brother did last summer. Haley read five books. Which equation could you use to find how many books her brother read(b)?

96. math

how do you solve this? cosx - cos(2x) =

97. medical terminology

Making use of the following terms, write a fictitious medical report of about two paragraphs describing a dermatologic condition or disease. Focus the report on the onset, progression, location, and etiology of the condition or disease, and the treatment

98. Social Studies

List 2 reasons why people abuse cocaine. Explain 2 consequences of abusing cocaine.

99. english

a sign warned drivers about falling rocks along the street.

100. math

One last darn problem.. A square: the top is labeled b+4, the right side is labeled, b. The perimeter is? The area is? :-)

101. math

Solve the equation: 6x^2+12x+5=0

102. math

Solve the equation: 1/x+3/x^2=-1

103. Algebra

One last darn problem.. A triangle: the top is labeled b+4, the right side is labeled, b. The perimeter is? The area is? :-) Not a square..

104. Art

Thank you very much, Writeacher. Here are some more phrasal verbs related to phone calls I'd like you to check. Thank you again! 1) When I rang her the first time, we were/got cut off (the line dropped) and I had to call her again. 2) As soon as I got back

105. civics

why is the u.s. presidental power decreasing?

106. marketing

You have been approached by the makers of the Holo-Generator. The Holo-Generator is an innovative product that fits in the palm of your hand and plays three-dimensional music videos through sound and holographic images. This product has not yet been

107. Math..plzz help

Compare the graphs f(¦È)=sin¨¨ and f(¦È)=sin(-¦È). f(¦È)=cos¨¨ and f(¦È)=cos(-¦È). What conclusions can you make?

108. algebra 2

List all possible rational zeros of each function. f(x)=4x^5+4x^2-9 Find all rational roots of each function f(x)=2x^3+x^2+8x+4

109. psychology

the term "insanity" is used

110. Physics 121

One end of the string in the diagram at right is wrapped around the cylinder. The other end is tied to the ceiling. The cylinder is released from rest. How fast is it moving after it falls 3.0m?

111. Algebra

Divide (42b^3 + 23b^2 + 38b + 49)/ (6b + 5)

112. Calculus

Where does the line [x, y, z] = [6, 10, 1] + t[3, 4, -1] meet the xy-plane?

113. Amortization of Loans

A car is purchased for \$9,192.57 with \$1470 down and a loan to be repaid at \$200 a month for 2 years followed by a balloon payment. If the interest rate is 6% compounded monthly, how large will the balloon payment be?

114. Algebra

please help me to figure out in algebra 2/3-4/5-(-11/15) +7/10-5/2 the answer is 6/5 and I do not know how to work this out

115. math

Managers should consider ethical aspects of their decisions because:

116. algebra ll

Divide (42b^3 + 23b^2 + 38b + 49)/(6b + 5) This is tricky..help?

117. Algebra genius?

Find the variation constant and an equation of variation where Y varies directly as X and Y=60 when X=10 k=variation constant y=equation of variation

118. algebra

(2x4)x2 in the mod 5 system

119. algebra ll

One last darn problem.. A square: the top is labeled b+4, the right side is labeled, b. The perimeter is? The area is? :-)

120. Chemistry

Please can someone help explain the following: Explain the kinetics of combustion as a complex free radical process using hydrogen fuel.

121. Calculus

Determine an equation for the line parallel to 2x + 6y + 4z = 1 and contains the point P(3, 2, 1).