# Questions Asked onOctober 21, 2010

1. ## alegra.

A boat cruises 36 miles against a 3 mph current and 36 miles back in the direction of the same current. The round trip takes 5 hours. What is the speed of the boat in the still water? use d=rt

2. ## Science

A block is released from rest on a 45 degree incline and then slides a distance "d". If time taken to slide a rough incline in "n" times as large as that to slide on a smooth incline. Find the coefficient of friction.

3. ## math

things do not go quite as planned. you invested $8000, part of it in stock that paid 12% annual interest. however, the rest of the money suffered a 55 loss. if the total annual income from both investments was$620, how much was invested at each rate?

4c+2=18

23. ## GR.12 BIOLOGY

i have to do an experiment on alcohol fermentation using yeast and sugar. i decided that i will test the differnt types of sugars to see how fast or how slow the reaction will happen. The three types is sucrose which is brown sugar ,there is lactose and

24. ## math

please explain how 24 divided by 2.5 equals 9.6

25. ## physics

E^2/(e^(E/T)-1)Evaluate dn/dE at fixed T and enter it below.

26. ## College Chemistry

If 10.6 mol of carbon monoxide is produced how many grams of carbon were used? How do you convert moles to grams? And what are the steps please for the answer.

27. ## College Chemistry

Which is the correct form of equilibrium expression of the following reaction. 2PbS(s)+3O2(g)reverse arrow 2PbOs + 2SO2g Why is the answer Kc= SO2 power 2/O2 power 3 Why in particular is this the arrangement for equilibrium expression? Thank you

A marathon race has 522 runners divided into 6 groups. What is a reasonable number of runners in each group? A 112, because 522/6 is about 550/5=110 B 98, because 522/6 is about 500/5=100 C 87, because 522/6is about 540/6=90 D 82, because 522/6 is about

29. ## math

April rode 12.3 miles on her bicycle on Monday. Which is the best estimate of the totl distance April will ride if she rides the same distance each day for 7days? A 84 B 91 C 105 D 120

30. ## PROBABILITY

There are 3 lucky tickets among 10 lottery tickets. 3 tickets are drawn at random. What is a probability that one ticket selected randomly from those three is lucky?

31. ## Math

Explain how the digit 1 can have a different values in 111

32. ## Orientalism

I do not understand what Orientalism has to do with Arab and Muslim Americans. Can someone please explain

33. ## college

During the job analysis process, the primary purpoe of haveing workers review and modify data collected about their current positions is to

34. ## computer science(Algorithm)

An m X n YOUNG TABLEAU is an m X n matrix such that the entries of each row are in sorted order from left to right and the entries of each column are in sorted order from top to bottom. Some of the entries of YOUNG TABLEAU maybe ¡Þ, which we treat as

35. ## physics

A 90g arrow is shot straight up into the air with a spped of 23 m/s. It reaches a maximum height of 25.9898m. Find the initial kinetic energy. the acceleration of gravity is 9.8 m/s2. Answer in units of J. Find the potential energy at its highest position.

36. ## Math

Reduce each rational expression x^3-4xy^2/3x^3-2x^2y-8xy^2

37. ## geography

The connections between the countries of the world are likely to increase in the future. is this true or false

38. ## Math

How do you do this Simultaneous Equation? 3x+4y=14 x+y=3 Please give me the step by step solution. Thanks a lot!

39. ## physics

A 4600 kg helicopter accelerates upward at 2.26 m/s2. 2 The acceleration of gravity is 9.8 m/s . What lift force is exerted by the air on the propellers?

40. ## physics

A 4600 kg helicopter accelerates upward at 2.26 m/s2. 2 The acceleration of gravity is 9.8 m/s . What lift force is exerted by the air on the propellers?

41. ## logistics

For the logistic model f(x)=3x(1-x), if the starting fraction is 0.7, what will the next population fraction be?

42. ## English

Can you please check if it is everything right? Thank you. 1.I live in a small country village. My brother is a primary school student. 2.My parents are employees. 3.I’m a student at (of?) a technical high school with an emphasis on science. 4.I like

43. ## calculus

The population of less-developed countries in mid-2007 of 4086 billion expected to grow at 1.8% per year, If this growth rate continues until mid-2025, what will be the size of the population then?

44. ## computer program

where can i find a computer code for Simpson's 1/3 Rule using c++? please help. thank you.

45. ## physics

How long would it take for a stone to fall 250m traveling at a speed of 10m/s squared?

46. ## trig

how do you establish the identity of cos(3pi/2+0)=sin0

47. ## math

how far from the base of a 10ft ladder be placed so that it reaches 8ft up the wall

48. ## Chemistry

In this case, the inflection point, and equivalence, occurs after 23.25mL of 0.40 M NaOH has been delivered. Moles of base at the equivalence point can be determined from the volume of base delivered to reach the equivalence point and the concentration of

49. ## College Algebra

I REALLY don't understand the reason/basis/use of logarithms. I have listened to my teacher, who never is clear on much of anything (it would help if he spoke better English), and a more advanced student, who couldn't explain them to me. The problem I am

50. ## math

the diagram shows a square xyrz of side 15m with an inscribed circle centre o.calculate the area of the square, circle and the shaded region

51. ## english

My fiancé does not think he needs a credit card right now. We are already in enough debt. It has actually consumed our lives. Although most of the debt we have is his. I have my debts too, but they are much smaller. This is why he does not need a credit

52. ## english

What is the term for the character in conflict with the main character?

53. ## calculus

India's population has been catching up with China, with 1132 million in mid-2007 and growing at 1.6% per year, versus China then with 1318 million and growing at only 06%. If these rates continue, when will India have more people than China?

54. ## english

My fiancé does not think (he) needs a credit card right now. (We) are already in enough debt. It has actually consumed (our) lives. Although most of the debt (we) have is (his),I have (my) debts too, but (they) are much smaller. (This) is why (he) does

55. ## Physics

A 1.95 kg block is held in equilibrium on an incline of angle q = 53.1o by a horizontal force, F, applied in the direction shown in the figure below. If the coefficient of static friction between block and incline is ms = 0.313, determine the minimum value

56. ## english

whats dialogue?

57. ## History

Which statement is not a benefit of increased development? 1) improved access to health care 2) increased wealth 3) more even distribution of resources 4) reduced unemployment aren't all of these benefits?

58. ## math

how to find the values of x?? x^2 - 3x - 7 = 0 tried quadratic formula and completing the square what else can i do??

59. ## math

solve the equation giving your answer in correct to 2 decimal places 5x square+4x+1=3(1-3x)

60. ## chemistry

Determine the theoretical yield of CO2 if 250.0 g CaCO3 is heated.

61. ## math

using completing the square find the vertex and axis of symmetry for y = x^2 - 6x + 7 i cant complete the square for this one please help??

62. ## English

Would someone edit my essay so far please. So far, I only have the introduction, the first paragraph and the conclusion. I am arguing for school uniform. "You know, if we had a uniform policy, it would make things better in this school." (Mitchell). Said

63. ## Physics

The toy car in figure 6-12 runs off the edge of a table that is 1.225-m high. The car lands 0.400m from the base of the table a.How long did it take the car to fall? b.How fast was the car going on the table?

64. ## macroeconomics

Not really lookign for the answers btu moer of the fomrula or how to find the answers if ok. thank you The table below shows the United States components of M1 and M2 in billions of dollars for the month of December in the years 1998 to 2007 as published

65. ## test

grammar --verbs ) a helping verb is the verb that help the main verb make its statement(true or false)

66. ## calculus

India's population has been catching up with China, with 1132 million in mid-2007 and growing at 1.6% per year, versus China then with 1318 million and growing at only 0.6%. If these rates continue, when will India have more people than China?

67. ## earth

Is the amount of solar energy intercepted by earth affected by the presence of clouds in the sky?

68. ## math

find the vertex and axis of symmetry for y = x^2 - 6x + 7

69. ## calculus

solve tis 5x^+4x+1+3(1-3x)

70. ## literature

what is an oral language piece?

71. ## Math - point on the graph

Determine the coordinates of the point on the graph of f(x)=sqrt(2x+1) where the tangent line is perpendicular to the line 3x+y+4=0

What is the frequency of a photon with a wavelength of 2.50 102 nm? (The speed of light in a vacuum is 2.998 108 m/s. Planck's constant is 6.626 10-34 J · s.

73. ## chemistry

What is the energy of a photon with a wavelength of 1.45 103 nm? (The speed of light in a vacuum is 2.998 108 m/s. Planck's constant is 6.626 10-34 J·s.)

74. ## chemistry

What is the energy of a photon with a wavelength of 8.45 102 nm? (The speed of light in a vacuum is 2.998 108 m/s. Planck's constant is 6.626 10-34 J · s.)

75. ## chemistry

What is the frequency of a photon with an energy of 7.40 10-18 J? (The speed of light in a vacuum is 2.998 108 m/s. Planck's constant is 6.626 10-34 J·s.)

76. ## chemistry

What is the frequency of a photon with a wavelength of 5.60 10-7 m? (The speed of light in a vacuum is 2.998 108 m/s. Planck's constant is 6.626 10-34 J·s.)

77. ## chemistry

What is the energy of a photon with a wavelength of 4.55 10-6 m? (The speed of light in a vacuum is 2.998 108 m/s. Planck's constant is 6.626 10-34 J·s.)

78. ## chemistry

What is the wavelength of a photon with an energy of 6.35 10-19 J? (The speed of light in a vacuum is 2.998 108 m/s. Planck's constant is 6.626 10-34 J·s.)

79. ## hca/220

Can someone help me get started with this? If you were to break down the terms, "cervical", "mastoid", and "ethmoid"; how might those word parts look? What would be the definitions for each word part? I am not understanding what break down means?

80. ## physics

An athlete at the gym holds a 1.2 kg steel ball in his hand. His arm is 64 cm long and has a mass of 4.0 kg. What is the magnitude of the torque about his shoulder if he holds his arm in each of the following ways? 1. straight but 30 degrees below

81. ## physics

An athlete at the gym holds a 1.2 kg steel ball in his hand. His arm is 64 cm long and has a mass of 4.0 kg. What is the magnitude of the torque about his shoulder if he holds his arm in each of the following ways? 1. straight but 30 degrees below

82. ## Organic Chemistry Lab

For the "ISOLATION OF CHLOROPHYLL AND CAROTENOID PIGMENTS FROM SPINACH" Lab we have to think about how we can correct the following if they were to occur: a.) When a two-component mixture containing 1-ocetone and 1,4-dimethylbenzene gave only one spot with

83. ## English

Please check this paragraph.please. Wrongdoing and wickedness are as old as first man born in the world. These problems are so great that man cannot cope with it himself. Man can not escape way from wrongful act and the bad conscience without the help of

84. ## Organic Chemistry Lab

For the "ISOLATION OF CHLOROPHYLL AND CAROTENOID PIGMENTS FROM SPINACH" Lab we have to think about how we can correct the following if they were to occur: - A two component mixture containing dicarboxylic acid and a tricarboxylic acid gave only one spot

85. ## Organic Chemistry Lab

How do we correct the problem if during TLC development the solvent ran off the plate?

86. ## physics

Two children are balancing on a teeter-totter. One child has a mass of 30.0 kg and is sitting 1.3 meters from the pivot. The second child is sitting 0.8 meters from the pivot. What is the mass of the second child

87. ## chemistry

Problem#8: Metabolism of alcohol (ethanol, C2H5OH) by the body takes place according to the reaction: C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l) ΔHo = -1367 kJ Determine the number of “food calories” (Cal) supplied by the alcohol in a 12-oz (355-mL)

88. ## chemistry

Problem#9: Consider the fuel octane (the main component of gasoline) and its combustion reaction 2C8H18(l) + 25O2(g) → 16CO2(g) + 18H2O(l) ΔHo = -10,942 kJ The “fuel value” of a fuel (unit kJ/g) is defined as the energy released when 1 g of the fuel

89. ## chemistry

the half-life of radon-222 is 3.823 days. what was the original mass if 0.050g remains after 7.646 days?

90. ## physics

A Ferris wheel with radius 8.8 m rotates at a constant rate, completing one revolution every 34.6 s. Suppose the Ferris wheel begins to decelerate at the rate of 0.212 rad/s2 when a passenger is at the top of the wheel. Find the magnitude and direction of

91. ## calculus

If a store credit account charges 1.2% interest each month, what is the APR?

92. ## US History

Can I get some links to help me write this essay, please? 'Show how the ideas of the competing political positions on the creation of the new national government continued down to at least the time of the Civil War.' Thanks -MC

93. ## government

Who can impose the draft and under what circumstances?

94. ## physics

Two children are balancing on a teeter-totter. One child has a mass of 30.0 kg and is sitting 1.3 meters from the pivot. The second child is sitting 0.8 meters from the pivot. What is the mass of the second child

95. ## Chemistry

10. Avogadro's number can be used to find the number of atoms in an element.- T 12. A photon is a quantum of light energy.- T 17. The atomic mass unit is determined by Oxygen-16.- F 18. The number of particles in a mole is a constant.- T 19. The number of

what is 5 names for 15 useing distibutive properity

97. ## physics

A solid disc with radius R is is spinning. An object exerts a force F at the edge of the disc to slow down the disc. The disc slows down to rest in 2.0 seconds. How long would the disc take to stop if: the mass of the disc doubled in s the radius of the

98. ## physics

What angle does the tangent to the curve y(x)=sin^2(x/9)+16sin(x/9) at x=9\pi make with the x-axis?

99. ## chemistry

Crushed ice, at -25 digrees was heated using a bunsen burner. The temperature was recorded over a period of 16 minutes. Between 5 and 9 minutes there is no increase in temperature. What change of state is taking place?

100. ## PHYSICS

A model rocket is constructed with a motor that can provide a total impulse of 25.5 N · s. The mass of the rocket is 0.213 kg. What is the speed that this rocket achieves when launched from rest? Neglect the effects of gravity and air resistance.

101. ## PHYSICS

A stream of water strikes a stationary turbine blade horizontally, as the drawing illustrates. The incident water stream has a velocity of +18.0 m/s, while the exiting water stream has a velocity of -18.0 m/s. The mass of water per second that strikes the

102. ## PHYSICS

A student (m = 63 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.0170 s. The average force exerted on him by the ground is +16500. N, where the upward direction is taken to be the

103. ## algebra

Find the x and y intercepts: 3x - 2y = -12 i know the anwser is (2 , -3) but how do i show the work that i found that anwser?

104. ## chemistry

the heat of this reaction,Na + 1/2 Cl 2 NaCl, is 98.3 kcal/mole what is the heat given off two moles of NaCl are formed ?

105. ## Algebra

find the x and y intercepts: 3x - 2y = -12 i know for the x intercept, put y=0 in the equation,s olve for x. For the y intercept, do the reverse. But i still don't understand how to solve it. Its just majorly fustrating me. And i can't go to school and ask

106. ## Chemistry

24. A quantum is a finite amount of energy gained or lost by an atom.- F? 25. An atom is in an excited state when it has its lowest energy.- F 26. The Bohr model of the atom shows electrons in areas called energy levels.- F? 27. The principal quantum

107. ## physics

The velocity of a particle constrained to move along the x-axis as a function of time t is given by: v(t)=-(13/t_0) sin(t/t_0). a)If the particle is at x=4 m when t = 0, what is its position at t = 5t_0. You will not need the value of t_0 to solve any part

108. ## physics

In the vertical jump, an Kobe Bryant starts from a crouch and jumps upward to reach as high as possible. Even the best athletes spend little more than 1.00 s in the air (their "hang time"). Treat Kobe as a particle and let ymax be his maximum height above

109. ## Chemistry

Last ones: 32. There could be eight electrons in the first energy level.- F? 33. The first energy level can have only one sublevel.- F? 34. When electrons move from a high energy excited state to a low energy ground state, energy is absorbed by the atom.-

110. ## math

If f(x)=(3x+6)–1, find f'(x).

111. ## statistics

The Computer Anxiety Rating Scale (CARS) measures an individuals level of computer anxiety, on a scale from 20 (no anxiety) to 100 (highest level of anxiety). Researchers at Miami University administered CARS to 172 business students. One of the objectives

112. ## math

If f(x)=(3x+6)^–1, find f'(x).

113. ## probability!

we were given a chart - "researchers developed the following tabel of joint probabilities of number of drinks per day and development of ulcers" and the question is a. what proportion of people have ulcers - how am i supposed to know htis b. what is the

114. ## English

I'm having a hard time writing a thesis statement on three points that surrounding characters' traits in Arthur Miller's, The Crucible. Can anyone help me with three points. I have read it in class and reviewed it, but I still don't comprehend. I would

Why do your favorite teachers always leave?

116. ## calculas

If a ball is thrown vertically upward from the roof of 48 foot building with a velocity of 80 ft/sec, its height after t seconds is s(t)=48+80t–16t2. What is the maximum height the ball reaches? (my answer is 148). What is the velocity of the ball when

117. ## ap chemistry

Find the emf for the cell Cr(s) |Cr3+(aq, 0.37 M) || Pb2+(aq, 0.0095 M) | Pb(s). Answer in units of V I got .548733V Is this right?

118. ## calculas

If f(t) = square root of 7/t^5. Find f'(x) and f'(2)

119. ## calculus

If f(x)=(x^2+3x+2)^3, find f'(x).

120. ## US History

Linksss pleasee! 'A great deal of America's success can be traced to the impact of inventions. Show how several of these developments helped the country to grow.' Thaaanks! -MC

121. ## algebra

I don;t know how to solve the following equation. 9+6x=-6x+105 I have -6x +6x -105 -105 -96=12x 12 12 x=8

122. ## algebra

I don;t know how to solve the following equation. 9+6x=-6x+105 I have -6x +6x -105 -105 -96=12x 12 12 x=8

123. ## AP Chem

Calculate the average kenetic energy of the CH4 molecules in a sample of CH4 gas at 273K and at 546K. So, should I have two answers or one? Super confused

Can someone please help me understand what the best way would be to explain the possible benefits of using a network strategy to streamline operational procedures within a company which is working on its operational-management processes?

How do you divide three fourths of a square into 4 parts

126. ## Statistics

As standard deviation increases, samples size _____________ to achieve a specified level of confidence. A. Increases B. Decreases C. Remains the same

127. ## algebra

if 60% of m equals n, 60% of 6m is equal to what terms of n?

128. ## math

How many solutions satisfy the equation |3x-2|=|x|?

129. ## Algebra

The width of a rectangle is twice the lenght. If the area of the rectangle is 98, what is the width of the rectangle?

130. ## chemistry

what will be the mass of angydrous Alum left over if one starts with 100.00 g of hydrated Alum?

What does Air Mass Consist of?

132. ## chemistry

How many moles are in a sample of cobalt containing 5.0x10^23 atoms?

133. ## math

All the face cards (i.e., kings, queens, and jacks) are removed from a standard deck, and one card is drawn from the remaining cards. Let A be the event that a red card is drawn, and let B be the event that a spade is drawn. What is

134. ## Statistic

11.5 Consider an experiment with four groups with eighth values in each. For the following ANOVA summary table, fill in all the missing results. Source Degree of freedom Sum of Square Mean Square(Variance) F

135. ## geometry

What is 15cm x 10cm as using a picture frame?

136. ## ap chem

how do you find mole fraction?

137. ## world history

compare Byzantine society to rome

138. ## geography

What does this mean? Thank you Colonialism is a process whereby sovereignty over the colony is claimed by the metropole and the social structure, government, and economics of the colony are changed, by colonists - people from the metropole.

139. ## Math

If f(x)=x^2-6x+14 and g(x)=-x^2-20x-k, determine the value of k so that there is exactly one point of intersection between the two parabolas.

148. ## science

what type of liquid will cause a penny nail paperclip and a sewing needle to rust the fastest need help

comaring and ordering fraction books never written

150. ## social studies

How did the Chinese Exclusion Act nd the Gentleman's Agreement limit the Asian immigration?

151. ## Science

Where are memories stored in your brain?

Each traveler gives the cab driver a tip using the same nine coins. The total tip is $8.41 (8 dollars and 41 cents) How many dimes did the cab driver get? asked by Tosha 153. ## math The ratio of the sales price of a jacket to the original price is 3:4. the original price is$64. what is the sale price? how do i figure this out

An ice cube that is 3 cm on each side is melting at a rate of 2 cm cubed per minute. how fast is the length of the side decreasing?

155. ## Science

Which one is different in the catergories? Plus, could you calssify the rest in the group, without the circled one? A. wheelbarrow B. wagon C. car -- --- D. shopping cart -- -------- ---- I think that the answer is D. shopping cart whing is uderlined or C.

156. ## math

17-7(x-3)+x=86

157. ## chemistry

how many atoms are in 26 moles of Ag

158. ## social studies

i need to draw a kid verson of a separatist

159. ## chemistry

How much of a 100mM solution do I need to add to a 2.5mM solution to make a solution with a final concentration of 10nM? Is there a formula for this? Please HELP!

160. ## English

Can a rough draft for a letter of application or cover letter be written front and back? Also how many lines do you skip for each topic. Thanks!

161. ## Literature/The Crucible

Can you help me with these two questions thanks. Acts 1 and 2 Cause and effect relationships The Crucible Directions: Fill in the blanks to show what happened (effect) as a result of specific action (cause) 1. Because Sarah Good had mumbled in Mary

Can someone please help me understand what the best way would be to explain the possible benefits of using a network strategy to streamline operational procedures within a company which is working on its operational-management processes?

163. ## Chemistry

Suppose you are standing 201 m from a radio transmitter. What is your distance from the transmitter in terms of the number of wavelengths for the following conditions? (a) The station is broadcasting at 1150 kHz (on the AM radio band)? (1 kHz = 1

164. ## physics

A planet is 400 times more massive than the earth, and its radius is 10 times that of the earth. The weight of an object on the surface of the planet is?

can you unscramble this word cegghimnuw

166. ## math

lydia wrote 4_1/2 pages of her science report in one hour. what was her writing rate in pages per minute? (2-4 rates ratios and proportions)

167. ## math

the ratio of hydrogen atom to oxygen atoms in water is 2:1 if an amount of water contains 341 trillion atoms of oxygen how many hydrogen atoms are there? how would i do this?

168. ## math

can someone show me how to set up this equation? the following figure which consist of seven equal squares has an area of 63 square units. find its perimeter. I have been racken my brain trying to set this equation up.

169. ## chemistry

i am doing a graph for my chemistry class, and i need help with excel. How do i plot 3.50X10^-3 into excel? it comes out as a negative number! help!

170. ## Math

Determine the domain and range of f(x)=-sqrt(x+3) and the equation of the inverse.

171. ## chemisty

what will be the mass of angydrous Alum left over if one starts with 100.00 g of hydrated Alum? please can you explain what fraction do I need to use. Based on the given information I can find the %theoretical of water in angydrous Alum. But I still don't

how can you model 624 without using hundreds

78=3c+12-c+4 solve

174. ## math

if you used 2 hundreds, 18 tens, and 4 ones to model a number. what number did you model?

175. ## us history

what foods where in the new world before the columbian exchange?

176. ## calculus

Let f(x)=4cos^5x. Find f'(x)

177. ## calculus

Evaluate the limit lim sin4x/tan9x x-> 0

Byron threw two rings. the difference between the numbers is 12. the lesser number is 15. what is the greater number.

179. ## math

a model airplane flies 18 feet in 2 seconds what is the airplanes speed in miles per hour round you answer to the nearest hundredth how would i do this

180. ## Chemistry

Calculate the [H3O+] of each of the following H2SO4 solutions. For a 0.50 M soln How do I reach the answer? Do I have to use a ice table?

a hopper jumps straight up to a height of 0.45m. with what velocity will it return to the table?

182. ## physics

If you are driving 100 along a straight road and you look to the side for 1.9 , how far do you travel during this inattentive period?

183. ## mkt 230

As a marketing consultant, you are frequently asked by clients to develop recommendations for marketing communication strategies. The traditional elements used include advertising, sales promotion, public relations, and personal selling. Which of these do

184. ## Enaglish

Please check this paraph We know that every man commits sins. There is no way that we can Undo our mistakes. It is only possible through the salvation . God likes those people who seeks His mighty forgivenss after committing sins, He don’t like those who

185. ## calculus

use the definition of the deriviative to find the deriviative when: a) f(x)= the square root of x b) y=mx + b c) y= x^2 + x

186. ## Physics

If you are driving 100km/h along a straight road and you look to the side for 1.9s , how far do you travel during this inattentive period?

187. ## Algebra

in a dartboard ther r 2 circles,one large circle n a smaller shaded one inside the larger one. the large circle has a radius of 2 feet n the smaller circle has a diameter of 2 feet. if a dart os thrown at the board wats the probibility that it will land in

188. ## AP CHEM

Complete and balance the reaction Al(s) + Pb2+(aq) ! using the smallest possible integers. I got: 2Al(s) + 3Pb2 ==> Al2Pb3 Calculate the standard free energy. Faraday’s constant is 96485 J V · mol Answer in units of kJ/mol. I know the formula is -nFE

189. ## Science

Which one is different in the catergories? Plus, could you calssify the rest in the group, without the circled one? A. wheelbarrow B. wagon C. car -- --- D. shopping cart -- -------- ---- I think that the answer is D. shopping cart whing is uderlined or C.

190. ## college Chemistry

Hydrobromic acid is a strong acid. If you have 1 L of a 7.5 M solution of Hydrbromic acid? A) What is the concentration of H_3O^+? B) What is the PH of this solution? C) If you dilute 1 liter of 7.5M in HBR solution to a volume of 2 L what is the new

191. ## Math

There are 80 players at the baseball tryout. 5 players are not trying out b/c of injuries, 15 are trying out for pitcher or catcher and 6 are trying out for a feilding position that excludes pitcher and catcher, whats the probliblity that a player is tryin

192. ## US history

For what reasons was the Tweed Ring so notoriours?

193. ## Physics

What is the equation for average velocity given x1 (initial distance), x2 (final distance), t1 (initial time) and t2 (final time)?

194. ## physics

Hi: I need help with the following physics problem. Can you explain it to me? Thank you, The fastest measured pitched baseball left the pitcher's hand at a speed of 50.0 . If the pitcher was in contact with the ball over a distance of 1.50 and produced

How do find the speed of a marble after falling from rest a distance of 1.2 m?

196. ## algebra

I'm working with absolute values, and for some reason I'm just really stumped by this problem. 7=|3x+9|+7 I don't see how I can get any number that will make the equation equal 7?

197. ## algebra

what does it mean when 2 ratios form a proportion??

Light travels about 1 mile in 0.000005 seconds. if a spacecraft could travel at this speed, it would travel almost 10*6 miles in 5 seconds. About how far would this spacecraft travel in 50 seconds?

199. ## algebra

i need help i don't get this whats the ratio of the sales price of a jacket to the original price is 3:4. the original price is \$64. whats the sales price??

200. ## Eurpoean History

How did imperial forces entice resistant countries into submission? What role did the promise of democracy play? In your opinion, was this promise kept? Why or why not?

201. ## English

Thank you very much. Could you please check these sentences,too? 1.My hobbies are doing athletics, playing the drums and going to the scouts (??) 2.I like going to pizza restaurants with my friends.I live in a quiet big flat. In my family there are four

202. ## ethics of law

I have to write an essay and I am stuck on one part that asks "describe the nature of ethics and their role in policing?" Help is greatly appreciated.

203. ## Math

How would you complete 7000 hundred thousandths=? hundredths

204. ## math

t + 1/4 = 5/9 t =???

205. ## Calculus

If f(x) = 2 √x, use the definition of derivative to find f′( x )

206. ## math

a vehicle uses 1 tablespoon of gasoline to drive 125 yard how many miles can the vehicle travel per gallon? a model airplane flies 18 feet in 2 seconds what is the planes speed per miles an hour? how do i do these

207. ## math correct or not corrext

a - 1/8 = 5/8 a= 6/8?

208. ## math

c - 9/10 = 1/3 c= 1 1/15?

what hatchet

210. ## economics

what does diversification do to risk?

211. ## statistics 221

A shipment of 35 computers contains three that are defective. How many ways can a small business buy four of these computers and receive no defective ones. a. 128 b. 35960 c. 52360 d. 6545

212. ## math

what is the orginal cost of 565.00 with a 5.5% discount

213. ## Ap Chemistry

Find the emf for the cell Cr(s) |Cr3+(aq, 0.37 M) || Pb2+(aq, 0.0095 M) | Pb(s). Answer in units of V I kept getting .55V but it is wrong. Can someone please help me?

214. ## social studies

This is regarding compare and contrast. The choices are 3 areas to build your home, Montains, Valley far from a river, and Sandy area near steep rocks. Compare and contrast 2 choices. then tell where you will build your house and why.

Can someone explain the steps to solve this problem? If a number ends in zeros, the zeros are called terminal zeros. For example, 520000 has four terminal zeros, but 502,000 has just three terminal zeros. Let N equal the product of all natural numbers from

216. ## statistics

For the data in the following table, select a type of display and describe the steps that you would take in developing it to show the relationship between age and deaths/1000 people from car accidents:

217. ## Physics

A sports car accelerates from rest to 89 km/h in 6.1s . What is its average acceleration in

218. ## Physics

A sports car accelerates from rest to 89 km/h in 6.1s . What is its average acceleration in

219. ## physics

From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. The bullet puts a hole in a window of another building and hits the wall that faces the window. (y = 0.42 m, and x = 7.2 m.)Determine

220. ## Writing

Does my thesis statement sound ok? Deforestation should no longer go on, because endangered species are close to extinction, less oxygen is being produced, and global warming is turning into a bigger issue because of it.

221. ## math

5 1/6 - 2 1/2 = 3 1/12

222. ## 8th grade pre algerbra

problem solving investigation: draw a diagram problem: kelly is using 3-inch square tiles to cover a 4-foot by 2-foot area the tiles are 0.5 inches tall if the tiles were stacked on top of each other to create a tower, how many inches tall would the tower

223. ## US History

What are some of the barriers immigrants have faced in their struggle for equality? Thanks -MC

224. ## Inequalities

I'm looking a problem in my textbook and I don't understand how it goes from one step to another. It starts out as: (120 * 2^5)/(180 * n^4) < 1/10^4 That turns into: n^4 > (64 * 10^4)/3 Can you please explain the steps between those two? Thanks

225. ## chemistry

Find the emf for the cell Cr(s) |Cr3+(aq, 0.37 M) || Pb2+(aq, 0.0095 M) | Pb(s). Answer in units of V Can someone please help me? I have the equation: 2Cr +3Pb(+2) --> 2Cr(+3) + 3Pb

226. ## math

find the unit rate. 400 cm to 1m

227. ## Physical world science

A study measuring the max height reached for various launch velocities and obtained the following data: V at m/s max height 0 0 10 28 20 35 30 42 40 49 50 56 60 63 70 70 1. plot the data on a graph 2. draw a best-fit line or curve through the data points

228. ## Spanish

There's no shoe verbs for Vestirse (reflexive) in the preterite right?

229. ## US History

1. In the war of 1812 the most effective American Action against British shipping was by: A. US navy frigates B. navies of individual states C. pirates in the Caribbean D. US Navy submarines E. privateering merchantmen 2. The British changed their strategy

230. ## math

p - 3 2/3 = 1 1/3 p= 4 3/3 then do I simifly that ?

231. ## grammar

Please bring the pens to Julio and

232. ## math

p - 3 2/3 = 1 1/3 p= 4 3/3 then do I simifly that ?

233. ## MATH

FIND THE MEASURE OF A COMPLEMENT OF AN ANGLE THAT MEASURE 65DEGREES

234. ## math

find the unit rate. 5hr s of 6

235. ## math

The length of Laurie's rectangular swimming pool is triple its width. The pool cover an area of 192 m2. If Laurie swims across the diagonal and back, how far does she travel?

236. ## math

A department contains 13 men and 20 women. How many ways are there to form a committee with 6 members if it must have strictly more women than men?

237. ## physics

A daredevil jumps a canyon 10.6 m wide. To do so, he drives a car up a 19° incline. (The daredevil lands on the other side of the canyon at the same elevation as takeoff.) What minimum speed must he achieve to clear the canyon?

238. ## physics

A daredevil jumps a canyon 10.6 m wide. To do so, he drives a car up a 19° incline. (The daredevil lands on the other side of the canyon at the same elevation as takeoff.) What minimum speed must he achieve to clear the canyon?

239. ## math

How many 5-digit bank security Personal Identification Numbers (PIN) codes can be formed using the characters in the set {0, 2, 4, 6, 8, a, b, c, d, y } with the restrictions below. Note: For purposes of this problem, the PIN number can be "padded" with

240. ## math

There are a total of 152 foreign language students in a high school where they offer only Spanish, French, and German. You are given the following details for this semester: 58 take Spanish. 71 take French. 66 take German. 9 take Spanish and French but not

241. ## science

A 30kg girl and a 25 kg boy face each other on friction free roller blades the pushes the boy who moves away at a speed of 1.0m/s the girl's speed is m/s?

242. ## Math

lim as b approaches infinity of integral of xe^-x^2 from 0 to b aka lim b->inf int(0,b) x*e^(-x^2) dx

243. ## algebra

n to the 6th is greater than or equal to 38

244. ## math correct or not

y - 4 7/8 = 3/4 y = 5 5/8

245. ## physics

A model rocket is constructed with a motor that can provide a total impulse of 25.5 N · s. The mass of the rocket is 0.213 kg. What is the speed that this rocket achieves when launched from rest? Neglect the effects of gravity and air resistance.

246. ## Physics

I don't know the answer which is why I'm using this web site so I don't know why it's asking for the answer :(

247. ## US History

Last one! 'Describe the major territorial advances made by the US in the 19th Century.' Thanks -MC

248. ## algebra

a passenger train's speed is 60mi/h, and a freight train's speed is 40mi/h .The passenger train travels the same distance in 1.5 h less time than the freight train. how long does each train take to make the trip?

249. ## plz correct this line ..eng

but his purity is not last long as he start growing

250. ## social studies

what is the definition of values

251. ## math

f + 4 5/12 = 5 3/8 does 5 = 1 19/24? I don't think so and I'm confused

Recently my class and I watched the movie "The Martian Child", and the teacher told us to write about the theme: Changed perspectives lead to Understanding. ~ The teacher said that this could be our delayed thesis if we wished. This is how it needs to go:

253. ## Calculus

a populatioin of bacteria has an initial size of 500. the population doubles every 7 hours. a) how many bacteria will there be after 10 hours b) when will there be 3000 bacter? I keep getting answers that just don't make sense. Can someone do these out for

254. ## biology

in biology we are studying taxonomy. we are classifying our organisms by broadest to most specific: kingdom phylum class order family genus species how would i do this for a Siberian tiger?

255. ## algebra

megan paid 1.50 each for programs to the game. she sold all but 20 of her programs for 4.00 each. even factoring in the money she lost for not selling all the programs, she still made a profit of 45.00. how many programs did megan buy in the first place?

256. ## chemistry

Find the emf for the cell Cr(s) |Cr3+(aq, 0.37 M) || Pb2+(aq, 0.0095 M) | Pb(s). Answer in units of V I don't know what to do

257. ## algebra help

Two motorcyclists start at the same point and travel in opposite directions. One travel 3 mph faster than the other. In two hours they are 206 miles apart. How fast is each traveling? The speed of the slower motorcyclist is ___ mph.

258. ## Physics

A uniform solid cylinder of mass M = 2 kg is rolling without slipping along a horizontal surface. The velocity of its center of mass is 27.6 m/s. Calculate its energy. I got 761.76 Joules but I think it's wrong.

259. ## Physics - Height of ball launch

A solid ball of mass m and radius r rolls without slipping through a loop of radius R, as shown in the figure. From what height h should the ball be launched in order to make it through the loop without falling off the track? (Use any variable or symbol

260. ## english

I have to write a eulogy for Juliet. And every sentence have 10 sylables can you check my work please. Juliet was good,young,and full of love she was born a short 13 years ago. she was always polite,never talked back, she was in love too much with Romeo.

261. ## math

there are 4 girls in Mrs. Changs class than Mr. Blackwell's. 5 girls moved from Mrs. Changs to Mr. Blackwells. Now there are twice as many girls in Mr. Blackwells class as there are in Mrs. Changs, How many girls were in Mr. Blackwells class to begin with?

262. ## statistics

With a normal distribution and a mu=40 and sd =4, how can I figure out what percent of the area lies to the right of a reported score of x=45?

263. ## social economics

Does international law work? In what situations is it most effective? In what situations is it least effective?

264. ## Math

The highest point in NewOrleans, Louisiana is 15 feet above sea level.The Lowest Pont is 4 feet below sea level. Howmuch higher is the highest point than the lowest point ? How would you explanin this? Whats the Answer

265. ## management

I need help on where to find information on the effectiveness of wal-marts control mechanisms. The mechanisms are: price, communication, power and trust.

266. ## physics

A 435 N box is sliding down a 40 degree incline. If the acceleration of the box is 0.250 m/s^2, what is the force of friction on the box?

267. ## AP Physics

A marble is dropped from a height of 10 m. A 2nd marble is rolled off a 10 m table at 5 m/s. A 3rd marble is fired at 5 m/s at an angle of 45 degrees off the table. Which one is going 15 m/s when it hits the ground?

268. ## History

In their reporting of elections, the media tend to place cendidates and issues in the context of

269. ## To Writeacher

Writeacher, I did a composition on this movie, and I would appreciate it if u could check it over, thanks a lot.

270. ## math

A carpenter used 3 3/16 pounds of nails for a job. After the job was over, the remaining ails weighed 1 1/16 pounds. How many pounds of nails di the carpenter have at the beginning of the job? PLEASE HELP!

271. ## math correct or no

2 1/16 = d + 5 7/16 d= 3 1/4?

272. ## chemistry

Find the emf for the cell Cr(s) |Cr3+(aq, 0.37 M) || Pb2+(aq, 0.0095 M) | Pb(s). Answer in units of V I don't know what to do

273. ## Math

how do you show your work for long division this is the question 61.2 % -7.2

274. ## physics

A large boulder is ejected vertically upward from a volcano with an initial speed of 41.0 . Air resistance may be ignored.

A spider sits on its web, undergoing simple harmonic motion with amplitude A.What fraction of each cycle does the spider spend at positions with x>0.75A? Hint: Use the analog of uniform circular motion.

A spider sits on its web, undergoing simple harmonic motion with amplitude A.What fraction of each cycle does the spider spend at positions with x>0.75A? Hint: Use the analog of uniform circular motion.

277. ## math

one number is three more than a second number. Three times the first is 7 less than 2 times the second. Find the numbers. The value of the second number is ___

278. ## Physics

A 100-N force has a horizontal component of 80 N and a vertical component of 60 N. The force is applied to a box which rests on a level frictionless floor. The cart starts from rest, and moves 2.0 m horizontally along the floor. What is the cart's final

279. ## Chemistry

1. When a potassium atom reacts with a bromine atom, the bromine atom will a) lose 1 electron and form a positive ion b) lose 2 electrons and form a positive ion c) gain 1 electron and form a negative ion d) gain 2 electrons and form a negative ion I know

280. ## Chemistry

Which of the following elements has an ionic radius greater than its atomic radius a) Ca c) Fe b) Li d) N

281. ## math

how do you write an equation of the line containing point (4,-3) and perpendicular to the line y=3x-5? show steps please

282. ## Chemistry

4. Which has a larger radius, S or S-2? Explain. thanks for the help !

283. ## algebra

8x-6 over 5x squared over x squared +18x+46 over 6x

284. ## Chemistry 1

What is the minimum amount of a 6.0 M solution of sulfuric acid necessary to produce 25 grams of hydrogen gas if the molar ratio in the chemical reaction is a 1:1

285. ## Physics

A person pushes horizontally with a force of 270 N on a 55 kg crate to move it across a level floor. The coefficient of kinetic friction is 0.25. What is the magnitude of the frictional force? What is the magnitude of the crate's acceleration?

286. ## legal aspects of business

research an American firm/corporation that has been affected or is in the process of responding to recent shifts in international policies and regulations as they relate to foreign investment. Summarize your findings in 5-7 paragraphs. Write an additional

287. ## math

x - 3/4 + 1/6 = 1 5/12

288. ## math word problem

A restaurant chef needs 8 1/2 pound of salmon. To get a good price, he buys more than he needs. He ends up with 4 7/8 pounds too much. How much salmon did he buy?

289. ## physics

a satelitee breaks in half while in circular orbit about the earth

291. ## physics

You inflate your car tires to a gauge pressure of 2.43 atmospheres at a temperature of 24 degrees C. After driving a couple of miles the temperature of the tire increases by 46 degrees C. What is the new gauge pressure to the nearest hundredth of an

292. ## Science

Give the condensed structural formula for 1-butanol

293. ## math

what is 1/3 + 1/3 = ?

294. ## Math

Solve for: cos (2 theta) = 2 - 2 sin^2 (theta)

295. ## Chemistry

Which compound forms a colored aqueous solution? a) CaCl2 c) NaOH b) CrCl3 d) KBr i think its Cr because its an transition metal. but im not sure.

296. ## Physics

Along the remote Racetrack Playa in Death valley, California, stones sometimes gouge out prominent trails in the desert floor, as if they had been migrating. For years curiosity mounted about why the stones moved. One explanation was that strong winds

297. ## Math

Jarrels goal is to be half finished with the book he is reading by friday. By wednesday he has read 1/3 of the book.How much more does he need to read to meet his goal?

298. ## calculus

Explain and show how you would estimate 0.5 x 4.62 . Then justify why this is a good choice for arriving at the correct answer.

299. ## calculus word problem

a conveyor belt pours gravel into a pile at a rate of 20 lbs per minue. the pile is shaped like an upside-down cone. the proportions of the cone are such that when the pile is complete, the diameter of the base is 6 ft and the height is 10 feet. how fast

300. ## Math

find all real and imaginary solutions x^(2/3)-2=x^(1/3)

301. ## math

Write the fllowing statements as integers * 4 degrees below zero * 20,000 leagues under the sea * a gain of 11 yards in Footbal * a loss of 36,000

At the Natural History museum Paula saw 5 times as many beetles as spiders. She saw 6 more spiders than caterpillars. If Paula saw 50 insects and spiders, how many of each kind did she see? Aunt is stumped!

303. ## MUSIC

notes that begin a phrase before a downbeat are known as pick-up notes or a/an? A. duck walk B. Call and response C. shuffle groove D. Anacrusis

304. ## math

In Harry's attic there are three spider webs. The first web is twice as large as the second web. The third web is 3 inches larger than the first web. The combined width of the three webs is 1 foot and 6 inches. Aunt is stumped again!

305. ## math word problem

A rectangular bathtub with a base of 18 ft^2 is filling with water at a rate of ..7ft^3 per minute. How fast is the water level rising after 3 minutes?

306. ## statistics

Suppose only 75% of all drivers in a certain state regularly wear aseat belt. A random sample of 500 drivers is selected. What is theprobability that a). Between 360 and 400 (inclusive) of the drivers in the sampleregularly wear a seat belt? b). Fewer than

write the following expanded notation in standard form. 600+50+4+0.2+0.07+0.009 ?? Build a 4 digit numeral. write 3 in the hundreths place 4 in the tens place 6 in the ones place,and 9 in the tenths place . ___ ___ ___ ___ please !help me with these to

308. ## math

Find all real solutions: sqrt(x+10)+ sqrt(x-1)=11

309. ## algebra

train A and B are traveling in the same direction on parallel tracks. train A is going 80 miles per hour train B is going 84 miles per hour. train A past a station at 2:15 am train B passes at 2:45 am what time will train B catch train A

310. ## algebra II

An aircraft flew 6 hours with the wind. The return trip took 7 hours against the wind. If the speed of the plane in still air is 276 miles per hour more than the speed of the wind, find the wind speed and the speed of the plane in still air. The wind soeed

311. ## math

an oceanographic research vessel comes across a volcano under the sea. The top of the volcano is 450 ft below the surface and the sea floor is -6700 ft. What is the height of the volcano. I believe it would be -6250ft..is this true

312. ## math

what is the sign of the answer, when an odd number of negative numbers are multiplied?

313. ## math 11

Is it possible for a rectangle with a perimeter of 44cm to have the area of 125cm^2 ? If so, find the dimensions of the rectangle. Figure out the equation in general form.

314. ## math

solve the equation for all real and imaginary solutions (x-3/2)^2-2(x-3/2)+26=0

315. ## math

write a number pattern for 8 star fish if each has 5 arms

316. ## Math

Solve:(sec 35 degrees) (csc 55 degrees) - (tan 35 degrees) (cot 55 degrees)

317. ## algebra

what is the solution of this problem 0.6x+8