1. physics

A stone is suspended from the free end of a wire that is wrapped around the outer rim of a pulley, as shown in the figure (see the figure ). The pulley is a uniform disk with mass 10.4 and radius 51.0 and turns on frictionless bearings. You measure that

2. Physics

A balloon rubbed against denim gains a charge of -8.0 uC. What is the electric force between the balloon and the denim when the two are separted by a distance of 5.0 cm? (Assume that the charges are located at a point!)

3. Chemistry

How do I identify the reducing agent in a reaction of magnesium with oxygen?

4. English

1. A major difference between today’s Hispanic and past European immigrants is that— (1 point) for Hispanics, the old country is only two hours away. European immigrants were all light-skinned. Hispanics are willing to take jobs Americans don’t want.

5. Physics

A balloon rubbed against denim gains a charge of -8.0 uC. What is the electric force between the balloon and the denim when the two are separted by a distance of 5.0 cm? (Assume that the charges are located at a point!)

6. Chemistry

Consider the following reaction: 2NOCl(g) 2NO(g) + Cl2(g) Initially pure NOCl(g) is placed in a vessel at 3.00 atm. At equilibrium, 0.416% of the NOCl has decomposed. Determine the value for Kp.

7. English

How do the styles and themes of “Theme for English B” and “Ballad of Birmingham” compare? Answer this question in at least a paragraph and make sure to cite examples from the text. Answer:

8. Chemistry

Write a balanced equilibrium equation and kb expression for the reaction of the hydrogen phosphate ion (HPO4^2-) with water. Answer: HPO4^2-(aq) +H2O(l) PO4^3-(aq) +H3O+ (aq) kb= [PO4^3-][H3O+]/ [HPO4^2-] is that right?

9. Chemistry

I keep getting the last part of this question wrong. Strong base is dissolved in 765 mL of 0.200 M weak acid (Ka = 4.63 x 10^-5) to make a buffer with a pH of 4.18. Assume that the volume remains constant when the base is added. HA(aq) + OH-(aq) -. H2O(l)

10. Math

A die is rolled, and the number that falls uppermost is observed. Let E denote the event that the number shown is even, and let F denote the event that the number is odd number. A. Are the events E and F mutually excluseve? B. Are the evnts # and F

11. Chemistry

Classify the following 3 acids in order of increasing acidity: Acid 1:Ka = 8 x 10-6  Acid 2:Ka = 6 x 10-4  Acid 3:Ka = 9 x 10-11

12. Physics

A baseball is hit at ground level. The ball is observed to reach its maximum height above ground level 3.0 s after being hit. And 2.5 s after reaching this maximum height, the ball is observed to barely clear a fence that is 97.5 m from where it was hit.

13. Chemistry

Are the reactants or the products favoured in the following reactions? a. CH3COOH with NH3? b. HS- with HCO3-? c. HNO2 with NH3 d. NH4+ with F- e. C6H5COOH with CH3COO- f. H2SO3 with HCO3- g. H2CO3 with SO32- h. H2SO3 with SO32-

14. calculus

Eliminate the parameter and write the corresponding rectangular equation whose graph represents the curve. x=4+2cos(theta) y=-1+2sin(theta)

15. English

ENGLISH HOMEWORK.. Need to write a antecedent for each Pronoun that is Capitilized in sentences.? Need to write a antecedent for each Pronoun that is Capitilized in sentences 1. Some of the Students brought THEIR lunches to the beach. 2. Ken took Meg home

16. chemistry

what is the ionization reaction and acid ionization constant expression for the HS- ion in water?

17. Chemistry

Commercial vinegar usually has a concentration of 5%, per volume. a) Calculate the [H3O+] , if the density of acetic acid is 1.051 g/mL. b) Calculate the pH.

18. Chemistry

For the following acids: i. CH3COOH ii. HNO2 iii. HCN a) What is the dissociation equation in an aqueous solution? b)Give the KA expression for each of the acids. c)Identify the acid-base pairs.

19. Chemistry

Calculate the volume of Ba(OH)2 0.20 M necessary to neutralize 300.0 mL of H3PO4 0.30 M. (4 marks)

20. circle

A park maiand mantenance person stands 16m from a circular monument. Assume that her lines of sight from tangents to the monument and make an angle of 47 degrees. what is the measure of the arc of the monument that her lines of sight intersected possible

21. geometry

hich is the equation of a circle with diameter AB with A(5,4) and B(-1,-4)? possible answers; (x-5)^2+(y-4)^2=10 (x+5)^2+(y+4)^2=100 (x-2)^2+y^2=25 (x+2)^2+y^2=5 Not sure

22. trig pre calc

cos x (sec x +cos x csc2x)=csc2x

23. CHEMISTRY

Write the formulas for the following substances as they would appear in a total ionic equation: a) Aqueous acetic acid b) solid lithium carbonate c) Aqueous ammonia d) Aqueous sodium dihydrogen phosphate I don't know, do we have to write the formula [like

25. Chemistry

The equilibrium constant for the following reaction is 7.2 x 10-10. What is the [H+] in a solution 1.0 M of this acid? HCN + H2O --> H3O+ + CN-

26. Chemistry

Which of the following contains the highest H3O+ ion concentration? Explain your answer. HCl 0.1 M HCH3CO2 0.1 M

27. geometry

The ratio of the areas of two similar triangles is 36 : 25. What is the ratio of the perimeters of the two triangles?

28. chem

what is the maximum amount of KNO3 that can dissolve in 300 grams of water at 40 degree C. Solubility of KNO3 is 60g/100g at 40C. how do i start to solve this?

29. Maths

A fence that is 4 metres tall runs parallel to a tall building at a distance of 1 metre from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

30. ICT

Indicate the type of method used to access data for the following: (a)Hard drive (b)Magnetic tape

31. Chemistry

A weak acid solution, HX 0.37 M, has a pH of 3.70. Calculate the acidity constant for this acid.

32. math

A solid cone is cut into two parts by a plane parallel to the base and 3/5 of the height of the cone above the base. Find the ratio of the volumes in the two parts.

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33. open collages "pet obedience trainer'

which one of the following statements describes classical conditioning: A. it generally involves more than one independant variable B. it involves the pairing of a conditioned stimulus with an unconditioned stimulus C. it depends on a close relationship

34. Geometry

The surface area of a cone is 55 pie cm squared. The radius is 5 cm. What is the slant height?

35. chemistry

calculate the molar solubility of FeCO3. How many grams of FeCO3 are present in 15 L of a saturated FeCO3 solution ?

36. finance

the bubba corp. had net income before taxes of \$200.000 and sales of \$200.000. if it is in the 50% tax bracket ifs after tax profit margin is?

Please check to make sure I did these correctly, so confusing. Thank you. Rename each fraction as a terminating or repeating decimal 13/20 .65 1/3 0.3333333333333333 2/9 0.2222222222222222 5/12 0.4166666666666667 1/16 0.0625 Rename each mixed number as a

38. geometry

The scale factor for two similar triangles is 4 : 3. The perimeter of the smaller triangle is 12. What is the perimeter of the larger triangle?

39. CHEMISTRY

Use the solubility rules to predict whether the following substances are soluble or insoluble in water: a) K2CrO4 _______________ b) NiSO4 _______________ c) Cu(OH)2 ______________ d) Pb(C2H3O2)2 __________ e) Ag2CO3 _______________ f) Al2S3

40. Algebra 2

Soo the equation is 25y^2-9x^2-200y-36x+139=0 and for the center is got (2,4) and the vertices I got (2,7) and (2,1) But i cant figure out how to find the slopes of the asymptotes and it wants the answer is reduced fraction please explain

41. pre-calculus

Currently in school we're learning about proving identities and for extra credit I got this problem. cosB= -8/17 in quad II and I have to find sin 7B. I have gotten this far: sin7B= sin(3B+4B) sin3Bcos4B+sin4Bcos3B my problem I can't figure out how to

42. math

Franklin deposited \$1,400 in a savings account that accrues simple interest at 6.75%. What is the balance in his account at the beginning of the third quarter?

43. statistics

Compare the standard deviation for the heights of males and the standard deviation for the heights of females in the class. Compare the values and explain what can be concluded based on the numbers. female 2.541 male 4.21

44. economics

When the price of corn dogs is \$1.00, 5,000 corn dogs are demanded. When the price of corn dogs is \$2.00, 2,500 are demanded. What is the price elasticity of demand for corn dogs?

45. math

A box contains five blue, eight green, and three yellow marbles. If a marble is selected at random, what is the probability that it is not blue?

The volume of a sphere is V = 14,130 ft3. What is its surface area? What is it's radius? The volume of a sphere is V = 4443 m3. What is its surface area? What is it's radius?

47. chemistry

What is the pH of a solution prepared by dissolving 12.2 g of benzoic acid in enough water to produce a 500 mL solution?

48. Physics

What will be the final temperature of 130 g of 20°C water when 100 g of 35°C iron nails are submerged in it? (The specific heat of iron is 0.12 cal/(g·°C).)

49. physics

Hi, my teacher doesn't teach us too well and we have a few packets to hand in for tomorrow that I really don't understand much of. If someone could give me the answers to all of the problems on the first link if you search "the electrical energy converted

50. algebra

determine the amount of an investment if \$500 is invested at an interest rate of 4.25% compounded quarterly for 12 years?

51. English

Hello. I will be very grateful for some language help. 1)Is it possible to use "have" with the word "victory", for example "Last year our country had an important victory - it joined UNESCO"? 2)Is it possible to use "have a win" in the same context: "Last

52. physics 30

an object is thrown from 1.5m above the ground with a velocity of 15m/s and at an angle of 25deg with the ground. using vectors and motion equations, determine how long the object will remain in the air before returning to the ground. ARGHHHHHH help

53. Chemistry

A balloon that has a temperature of 12C and a volume of 10.0Lt has its temperature raised to 150C. Assuming a constant pressure, what will the new volume of balloon be?

54. English - ms. sue

ms. sue teacher say i have to do easy bib workcite page even for pictures i get from internet she say they need to have authors but images i get from google not have any authors you know site i get pictures from that have authors?

55. Chemistry

200 g of CH3COOH are dissolved in enough water to make 1.5 L. What is the molarity of the acetic acid solution?

56. Chemistry

Calculate the KA of formic acid if 2.3 g of it is dissolved in 1 litre of water to give [H+] of 0.003 M.

57. Chemistry

The highest positive oxidation number that chlorine can exhibit an any compound is +7, whereas its most negative oxidation number is -1. Write the electron configuration of chlorine and explain why these are limiting oxidation numbers for chlorine.

58. Art

I would like you to check these last sentences? Thank you very much Writeacher. 1) They had an argument but they made it up. 2)They held up a bank but they managed to get away with it. 3) He needn't have bought a new map. 4) It wasn’t necessary for her

59. MATH

The probability that a voting-age adult in 2004 voted in the presidential election was 0.57. Five voting-age adults in 2004 were randomly selected. Find the probability that exactly 2 or the 5 adults voted in the presidential election.

60. Psy

it has been proposed that students have difficulty retuning to their academic schedule after a holiday or break. Specifically, it has been predicted that there will be more students absences on the Monday following Spring Break than on the Friday prior to

61. English - ms. sue

ms. sue i also want to say that jacob feel alone, but i not find proper word to say that he feel like a handful duty on his children. i not know what proper word to use.

62. statistics

the probability that a voting-age adult in 2008 voted in the presidential election was .57. Five voting age adults in 2008 were randomly selected. Find the probability that exactly 2 of the 5 adults voted in the presidential election.

63. trig

find the values of x between 0 and 2 pi where the tangent line to the graph of y = sinxcosx is horizontal

64. Reinbursement Methodologies

Which of the following would be the best to use to help plan home health care outcomes and assessments? A.MAC B.Oasis C.Raven D.Haven Can someone check my answer i chose (B)

65. geometry

In circle O, ∠AOB intercepts an arc whose measure is 50°. What is the measure of ∠AOB?

66. trig

2sin(4x)[(cos(3/2)x)(cos(5x/2)-sin((15/4)x)]+x can someone simplify this using trig identities?

67. physical

Fiend moment of inertia of a circular ring about a tangent to the ring the lying in its planc

68. Foreign languages

Writeacher, could you please check these other sentences. Thank you. Fill in the blanks with a suitable preposition. 1) I regret ….. inform you that you didn’t pass your FCE test. 2) Lucy dreams of………(go) to live in Australia. The fire officer

69. Physics

You are driving your car at a constant speed down the freeway. You are using 42 horsepower to do this. If the air resistance and frictional forces add up to 650 N, what is the net force on your car?

70. economics

The central bank is rensponsible for the management of monetary policy. What is the major tool of monetary policy, and how would it operate in the context of a tight money policy?

71. English - ms. sue

ms. sue i already say what rosemary represent but why she be important in story? because she introduce peace and happiness to main character? i not know wat else to say

72. Health

I left out two last sentences, Writeacher. Could you please check them? 1) I have no credit on my phone. I need to top it up. 3) They are trying out a new vaccine against cancer.

73. English, novel, ivanhoe

How is the late 12th century depicted by Sir Walter Scott, and do you find his interpretation realistic or purely fictitious? On what do you base your conclusions?

74. Calculus

Show by vector calculation that the bisector of the angle between the two equal sides of an isosceles triangle bisects the third side and is perpendicular to it.

75. geometry

Find the surface area of pyramid that has a regular hexagonal base od edge 6 cm and a height of 8 cm. Thank you so much

76. Spanish-Help with this question please

I'm not sure what they're asking in this question- are they asking where you are when you vacation? ¿Dondé te ustedes cuando de vacaciones? Answer-Yo estoy en Florida.

77. Psychology

I need my 10 quiz questions check for correctness. Thank you! 1. An asymptote is: a) a decrease in the strength of the conditioned response. b) an increase in the strength of the conditioned response. c) stability in the strength of the conditioned

78. geometry

Find the surface area of pyramid that has a regular hexagonal base od edge 6 cm and a height of 8 cm. Thank you so much

79. algebra

you have just graduated from college and recently opened a specialty pizza restaurant. Based on surveys conducted in your area, you determine what it is feasible to sell your specialty for \$15. The cost for making the pizzas includes a fixed cost of \$55

80. chemsitry

how do you find PH of {H+} = 1.0 * 10 to the -5 power M?

81. physics

you take 250.0 g of ice from the refrigerator at -8.00 degrees celsius. how much heat does it take to warm it to room temperature, 20.0 degrees celsius?

82. Algebra

how do i find the fractional notation of 11.443 and equal it to ?/1000

83. Calculus

As you know, Chemproc, Inc. is a premier manufacturer of chemicals and chemical waste. Further, as has been recently highlighted on the local news, we are in the process of expanding our Lonlinc, Skanebra chemical manufacturing plant to add two or three

84. Science

What is a galaxy with no definite shape or size called?

85. GED-Word Problems

How many cubic feet of gravel will be needed to fill a circular area 14 feet across and 3 inches deep?

86. math

garys cat weighs 11 lb.How many ounces is that?

87. GED-Word Problems

Roland drives a mixer for a cement company. The mixer is a cylinder 10 feet long with a diameter of 9.5 feet. What is the volume of the mixer?

88. math

2 planes parallel to the base of a pyramid cut the pyramid at 1/4 and 2/3 of the height as measured from the base up. If the volume of the pyramid is 100 cubic inches, what is the volume of the middle piece to the nearest tenth?

89. algerbra 2

What did the baby pocupine say when it backed into a cactus?

90. chemistry

a 8.6 *10 to the -3 power M solution of H3PO4 has a PH of 2.30 what is the Ka for H3PO4?

91. math

If an object with the weight of 70 newtons requires 37 newtons to start sliding, what is the value of the coefficient of the static rounded to the nearest tenth?

92. Physics

A block of mass m lies on a rough plane which is inclined at an angle è to the horizontal. The coefficient of static friction between the block and the plane is ì. A force of magnitude P is now applied to the block in a horizontal direction, towards the

93. English - ms. sue

ms. sue you know what I name my poster on rosemary?

94. algebra

an angle is (3x+43) and (8x+8) what is the degree of the angle

95. Psychology

Alexander, a fifth grade teacher, believes that Kimberly's behvior is a result of poor parenting. The school counselor is concerned with her inability to focus, attendto directions, and recall information from the prevous day or events from earlier in the

96. Please can you help me (Statistic))

If the confidence interval obtained is to wide. How can the width of this interval be reduce and which alternative is the best and why? Thank you for your help

97. Spanish

I had to write about what I do when I go to the airport. Is this correct Voy al aeropuerto con mi equipaje. Me presento en el mostrador con mi boleto aéreo y mi pasaporte. Registro mi equipaje. Voy con mi maleta de mano y paso por seguridad. Luego de

98. English Literature

What is the purpose of Cantos 26-28 of Dante's Inferno?

99. math

what is the locus of the midpoints of the line segments joining a given external point to all points of a plane? (Locus is set in space aka 3d)

asked by My Name Is Bob
100. English - ms. sue

WFE question chapt 12 uncle al want be like ring ling bros, wat be harms he be putting his team in? that be he making them do hard work? main character jacob say he hate that he be in love with mrlena nd hate he let both of them down. who be they nd why he

101. English - ms. sue

WFE queston chapt 13 what difference main character see in circus in nursing home and one he see when he be young? this be be less abusive and not interesting?

102. English - ms. sue

chapt 14 WFE camel not alright because he drink jake and he be paralyzed? it ask what be physically wrong with him and what do kinko say he have. he have jake leg? how u ease someone in camel's place? i not get how to ease someone in that place

103. English - ms. sue

chapt 14 question WFE kinko say we cant keep camel concealed 4ever Wat be some presumptions u hve about this statement that everyone find out about his problem?

104. Chemistry

What is the pressure of a sample of Chlorine gas if the gas sample contains 0.25 moles of Chlorine and has a volume of 150 L with a temperature of 25 K?

105. English - ms. sue

WFE chapt 14/15 in chapt 14 end wat do mrlena say w/o verbally saying it? that be she love jcob?

106. Chemistry

Working on a practice question for finals so I really want to understand how this works: What is the coordination number of mercury in K2[HgI4]? I say that mercury's coordination number is 4 because I^- is a monodentate ligand. Does the potassium affect

107. math

2x^-15y^15/x^20y^-10

108. English - ms. sue

WFE question it be right for jcob & kinko to inform cmel son? i think it be because they not want him to get killed and that be only other option. who be blamed? uncle al or agust? for that rosie complication that happen in chapter 15? al for buying

109. physics

a bus engine can operate at very high temperatures . if one of the cylinders has a volume of 1 litre and is initially at 25°C and atmospheric pressure , what is the temperature when the gas in the cylinder is reduced to a volume of 100cubic centrimeters

110. statistics

Compare the standard deviation for the heights of males and the standard deviation for the heights of females in the class. Compare the values and explain what can be concluded based on the numbers

111. deforestation

im making a list of negative effects of deforestation, could I get a couple of effects?

112. Author

When being an author, what's the salary Do you get paid when you publish a book? Is it the author choice for the price of the book? Do you get paid a lot when being author?

113. Math

A hi-tech bowling ball is constructed from concentric spheres, kind of like a perfectly round M&M peanut. The inner sphere, of material X, has a radius of 1 inch. The middle spherical shell of material Y has a thickness of 2 inches. The outer shell of

asked by My Name Is Bob
114. chem

what is the boiling point elevation when 31.5 g of menthol (C10H20 O ) is dissolved in 258g of acetic acid? Kb for acetic acid is 3.07 C/m.

115. Chemistry

Hi Dr.Bob, Which is the correct formula for dinitrobis(ethylenediamine)cobalt(III) nitrate? I'm not sure which is the correct one out of these two: a)[Co(en)2(NO2)2]NO3 or b)[Co(NO2)2(en)2]3(NO3)3 ? At the instance, I've choosen option a). Is my naming

116. math

2006 the population of a country was 32.4 million. This was a 4.1% increase since 2001. What was the population in 2001?

117. Volume and Surface Area

Find the exact surface area and volume of a right square pyramid with a radius of 2 inches and a height of 6 inches.

118. math

which two points of a trignometric function will always give an average rate of change of 0?

119. Algebra

Use the graph of the function to estimate: a. f(2) b. f(–4) c. All x such that f(x) = 0

120. English -ms. sue

ms. sue do the character Mr. Freeman in movie Speak be good representation of rosemary in WFE? He give the main character Melinda encouragement.

121. English

Hello. I've just noticed that I posted my previous question in the wrong place. Sorry. I'll be grateful if you will answer my questions. 1)English has many synonyms,and sometimes it's quite difficult to choose the correct word. Is it possible to use the

122. ECO/372

product with an import surplus and the impact that has on the U.S. businesses?

123. Computers

For each order, display the Company Name, City, and the Country for the customer who placed the order.

124. Biology

What is a good question I can ask my class about Pulmonary Embolism that would create a good discussion?

125. Chemistry

Got another practice question but I'm really stumped on this one: If the [ZnCl4]^2- ion is diamagnetic what must its structure be and why - octahedral, tetrahedral or square planar? I know that diamagnetic means that all its electrons are paired and that

126. Chemistry

An aqueous solution of volume 7 dm3 is obtained by dissolving 5.5 kg of C12H22O11 in enough water. express the concentration in mol/L and mol/Kg

127. Statistics

M80,sd10,s8,n25 how do I calculate the sampling distribution parametes

128. Chemistry

A sample of a gas at STP has its temperature raised to 510C and its pressure raised to 5 atm. If the initial volume of this gas is 100.0 ml, what will the final volume be?

129. Math

hello I need help to do this exercise Consider the function f (x) = (16 x + 33) / (x +3) 1) Determine its domain Df 2) Solve the equation f (x) = 14 3) Show that for all x in Df: f (x) - 15 = (x-12) / (x +3) 4) deduct the resolution of the inequality f

130. Statistics

Having problems reading the z-table. I don't understand how .1500% equates to a 1.04 z-score Thank you for your help

131. Chemistry

A container with a volume of 19.6 L that has temperature of 37C and a pressure of 0.900 atm has its temperature lowered to 0.00C and its pressure raised to 1.90 atm. What will the new volume be? Assume that the number of moles is constant.

132. Chemistry

How many moles of Xe gas are there in a container of Xe with a volume of 1.5L, and a pressure of 1.25 atm, and a temperature of 150C?

133. math

1/5x+y=2 x-10++-5y

134. math

4x-y=7 5x+y=20

135. math

30d^2+71d+42=0

2sin(4t)[(cos(3/2)x)(cos(5x/2)-sin((15/4)x)]+x

x^2+x+3=0

138. Easy Math

If a basketball has a circumference of C = 2.98 ft, what is its surface area and its volume?

139. statistics

Transformation

140. English

Hello. I'll be grateful for some more help. Is it possible to use the Perfect tense twice in the sentence, for example "Peter, who has long lived in New York, has promised to show me the city"? Thank you very much for help. As for the sentence about

141. chemistry

how to calculate PH and POH {OH-) = 1.0 *10 to -11 power M?

142. algebra

-71+square root of 1/142 simplify

143. Writing

I need help answering this question. "America is a nation of entrepreneurs. Franchises provide too many people an avenue to achieve the “American Dream” by starting and maintaining a successful business. Investigate the positive contributions that fast

144. Art

I still have a few doubts on some corrections you did yesterday, Writeacher. Could you please check them? Thank you very much. 1)It took me a long time to grow into the job. (Also: It took a long time for me to grow into.....?) 2) She handed down a

145. Chemistry

4.00L of water was added to 0.400L of an aqueous ethanol solution, giving a final concentration of 0.0400 M. What is the initial concentration of ethanol? I just need help setting it up pls Thanks!

146. Chemistry

the chemical dichlorobenzne will not disolve in water, what muct the polarity of dichlorobenznebe by and why?

147. Chemistry

25g of ethanol is dissolved in 1.50 kg of whater. what will the boiling point of the solution be?

148. algebra

how do i round 2/15 to the nearest tenth, hundreth and thousanth?

149. Physics

A block of mass m is projected at speed Vo up a rough plane inclined at an angle theta to the horizontal. Model the block as a particle and assume that the frictional force acting is given by kv^2, where v is the block's speed and k is a constant. What is

150. GED-Word Problems

A pan is 24 cm wide 35 cm long and 2 cm deep. A full pan of brownies is how many cubic centimeters?

151. math

how many tons are in 35,00 lb?

152. math

how fast are 13 inch trailer tires going when my truck is going 55mph with 15" tires

153. social studeis

why do people celebrate when its kosovo's independence day?