# Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 2x + 10y = 58 -14x + 8y = 140

91,330 questions, page 820

do you mean like this: 720/(V-30) + 720/(V+30) = 10 Get a common denominator of (v-30)(v+30) then multiplying both sides by that, then (v-30)(v+30)X 720(V+30) + (v-30)(v+30) X 720(V-30)=(v-30)(v+30)X 10(v-30)(v+30) then multily out, and solve for v.

asked by jas20 on February 25, 2007
2. ## College Algrebra Math 133 unti 1 IP 1

Suppose the width of a rectangle is 5 inches shorter than the length and that the perimeter of the rectangle is 80 inches. The formula for the perimeter of a rectangle is P=2L + 2W. Set up an equation for the perimeter involving only the L the length of

asked by Dana on May 11, 2013
3. ## mathemathics

an observer and a tree are standing against a slope. the observer is 80m from the tree.the angle between the slope, from the feet of the observer,and thetop of the tree is 14 degree.the slope makes an angle of 9 degree with the horizontal. solve the

asked by stanley on July 13, 2010
4. ## math

The speed of a locomotive without any wagons attached to it is 40 kmph. It diminishes by a quantity which is proportional to the cube root of the number of wagons attached. if the speed of the locomotive is 34 kmph when 27 wagons are attached. what is the

asked by praneethi on December 23, 2014
5. ## Physics

A 3.00 kg object with an intial velocity of + 5.00 m/s in the postive X direction collides with and sticks to a 2.00 kg object with an intial velocity of -3.00 m/s in the negative Y direction. Find the final componet of velocity of the composite object.

asked by Harry on December 11, 2006
6. ## analytical chemistry

In an experiment for determining water hardness, 75.00 ml of a water sample required 13.03 ml of an EDTA solution that is 0.009242 M. What is the ppm CaCO3 in this sample? Could someone please tell me if this is correct? Total hardness, ppm CaCO3 = mg

asked by Anonymous on February 3, 2013
7. ## physics

Bees often work together for the greater good of the hive. Sometimes they can get excess charge on them. Four pairs of bees, which can be represented as identical, conducting spheres, bump into each other in the hive. Rank the bees in the order of the size

asked by Justin on August 27, 2013
8. ## Physics

Bees often work together for the greater good of the hive. Sometimes they can get excess charge on them. Four pairs of bees, which can be represented as identical, conducting spheres, bump into each other in the hive. Rank the bees in the order of the size

asked by Jimmy on January 12, 2014
9. ## Math

The Higgins Company sold the Northwest Company some machinery parts. The net price was \$10,000, and the terms were 3 / 10 , n / 60. The items were shipped FOB shipping point and the shipping charges were \$100. The date of the invoice was July 10. If the

asked by Anonymous on October 6, 2011
10. ## AP Chem

A student conducts an experiments to determine the enthalpy of neutralization for phosphoric acid reacting with sodium hydroxide. The student combines 25.0 mL of equimolar solutions of acid and base, both having an initial temperature of 22.5 degree C, in

asked by Beth on November 6, 2010
11. ## Engineering Economics

A granary has two options for a conveyor used in the manufacture of grain for transporting, filling, or emptying. One conveyor can be purchased and installed for \$70,000 with \$3,000 salvage value after 16 years. The other can be purchased and installed for

asked by Anonymous on March 27, 2015
12. ## Physics

Suppose you’re eating in yet another restaurant where the dishes are shared at the table and all placed uniformly on a rotating disk-like surface. Model this surface as a thin disk of radius 30 cm. Someone else has spun the surface, such that it is

asked by Santhiya on April 22, 2016
13. ## Science

1) Which of the following is true about photosynthesis? A. It is an exothermic reaction B.It is a endothermic reaction ***** C.It produces carbon dioxide D. It occurs in animals 2) Atomic Theory is A.Subject to change if new information is discovered B.A

asked by noname on November 11, 2015
14. ## CICI

How do light microscopes work? Light microscopes use an electron beam to create an image of a specimen. Light microscopes use a combination of light and lenses to magnify a specimen.*** Light microscopes use a tiny tip that traces a specimen, enlarging it.

asked by Science on September 24, 2015
15. ## Math

Kenji has a box containing many blue rods, each one 252 cm long. Mei-Ling has a box containing many green rods, each one 408 cm long. They each start making a long line of rods of their colour by laying rods end to end. After a while, their lines are

asked by Sandy on April 22, 2015
16. ## Psychology

Jan is continuously late for school and has been stealing from others lockers and purses. How would each of these perspectives explain her behavior? Biological: Evolutionary: Humanistic: Jan could feel that she can't make her own choices, and can't control

asked by Jewbee on September 4, 2011

Which answer choice states the most logical conclusion based on the following statement by Patrick? I’ve never built anything before, much less a house. (1 point) 1. Patrick is not telling the truth. 2. Patrick feels uncertain in new 3. situations.

asked by Quinn on April 10, 2016
18. ## Math

A hippopotamus can stay under water for 15 minutes. A sea cow can stay under water y minutes. This is 11 minutes longer than one third the time a hippopotamus can. Write an equation and solve to determine how long the sea cow can stay under water.

asked by Mark on February 6, 2018
19. ## Geometry

Solve for x x/6 = x+1 / 9 x= 2 Tell whether the lines are parallel based on the given proportions (I think they are supposed to come out equal in order for the lines to be parallel) 16/4 = 8/2 32=32 yes, the lines are parallel 10/4 = 12.5 / 5 50 does not

asked by Anonymous on April 24, 2009
20. ## Biology- Amylase

Hello, In our class, we are doing a hypothetical digestion of starch by amylase lab. I do not know where to begin with this following information. If I add Benedict's solution (which I know will change color when the presence of sugar is noted). After all

asked by Nelson on November 4, 2007
21. ## physics

A 4.74 kg spherical ball with radius 1.4 cm rolls on a track with a loop of radius 39 cm that sits on a table 1.2 meters above the ground. The last 1 meter section of the track is horzontal and is not connected to the rest of the track. 0.33 meters of this

asked by jeff on December 21, 2008
22. ## Projectile Motion Help

I was wondering if you could help me solve this projectile motion problem. A projectile is launched with an initial speed of 14.5 m/s at an angle of 35° above the horizontal. The object lands at the same height from which it was launched. Air resistance

asked by Instantaneous on October 8, 2016
23. ## Physics

Hi, the following is a problem that concerns angular momentum: Modern hard drives spin very fast! The part that holds the data is a disk called the platter. Assume an aluminum platter that is 3.5in. in diameter, 1mm thick, and spinning at 5400 rpm. Treat

asked by Grace on February 17, 2017
24. ## pharmacology

1. Which one of the following drugs would you instruct a patient to take during a fasting period? A. Buspirone; B. Probucol; C. Lisinopril; D. Oxcarbazepine I think B. 2. You're training a new employee. He wants to know how to determine which needle to use

asked by Alisha221 on January 29, 2012
25. ## SOC 313

1. Motor and perceptual consequences of brain damage affect: (Points : 1) visual-spatial relations; vision and hearing; and bowel and bladder function memory; attention and concentration; and judgment speech and language personality change and affective

asked by Ms P on March 17, 2013
26. ## English

Read each sentence. Identify the comma error and put Add or Omit on the line to show how to correct the sentence. Then put the word in () before the error That shiny sleek car is new shiny add Courtney brought a delicious ham turkey, and beef sandwiches

asked by Jerald on November 27, 2012

In a recent survey of middle school students about pizza toppings, it was found that 25 students like pepperoni pizza, 31 like banana peppers pizza, and 5 likes both pepperoni and banana peppers on their pizza. if 66 students were surveyed, how many

asked by Anonymous on March 9, 2015
28. ## Science

PLANTS AND ANIMALS 18. Plants can cause mechanical weathering. The seed of a tree, bush, or other plant may sprout in soil that has collected in a cracked rock. As the roots grow, they ___, eventually breaking the rock into pieces. 19. Animals that ___,

asked by Barry Vacker on March 12, 2019
29. ## Physics

As a traffic light turns green, a waiting car starts with a constant acceleration of 6.0 m/s^2.At the instant the car begins to accelerate, a truck with a constant velcoity of 21 m/s pass in the next lane. (a) How far will the car travel before it

asked by Lena on April 17, 2009
30. ## English

I left out the following two sentences I varied. Thank you very much! 1) Macbeth hears a supernatural voice telling him that in murdering Duncan he has deprived his life of sleep. 2) He compares sleep to an innocent murder victim, to someone who repairs

asked by Henry2 on November 1, 2011
31. ## CHEMISTRY

As you may well know, placing metal objects inside a microwave oven can generate sparks. Two of your friends are arguing over the cause of the sparking, with one stating that the microwaves "herd" electrons into "pointy" areas of the metal object, from

asked by KTM on October 26, 2014
32. ## Physics

I'm stuck on this problem. "You mix 100 ml 60 degree C water with 100ml 20 degree C water. Find the final temperature" Changing 100 ml to .1kg, I set .1*4186*(60-final temp.) + .1*4186*(final temp-20)=0 but my t's cancel out. I know it would work if I set

asked by Brigid on April 28, 2009
33. ## Chemistry

Calculate the theoretical yield in moles of Fe(C5H7O2)3 for this experiment. Record this number on your data sheet. Calculate the theoretical yield in g Fe(C5H7O2)3 (GMM: 353.18g mol^-1), for this experiment. Record this number on your data sheet. I really

asked by Singh on October 21, 2012
34. ## chemistry

Calculate the theoretical yield in moles of Fe(C5H7O2)3 for this experiment. Record this number on your data sheet. Calculate the theoretical yield in g Fe(C5H7O2)3 (GMM: 353.18g mol^-1), for this experiment. Record this number on your data sheet. I really

asked by Anonymous on October 21, 2012
35. ## Finance

Describe a work-related situation you feel could be improved. For example, you want to streamline the process for reimbursing employees, or you want to create a high-tech website for your small business but have no experience in programming or graphic

asked by mee on June 11, 2010

Describe a work-related situation you feel could be improved. For example, you want to streamline the process for reimbursing employees, or you want to create a high-tech website for your small business but have no experience in programming or graphic

asked by mee on June 11, 2010
37. ## Motion equation

A stone, which weighs 0.62kg, is thrown, at 5.5ms, its kinetic energy at its maximum height above the surface is 2.3J, what is the height of the stone at this point? Any eqautions or advice gratefully received. I assume that is 5.5 m/s, the initial

asked by Mac on December 17, 2006
38. ## chemistry

Shown below is a schematic representation of the water-ethanol phase diagram. Making reference to the phase diagram, explain in a few sentences how one could enrich a solution of 15 percent ethanol - 85 percent water to a composition of 60 percent ethanol

asked by C on December 21, 2012
39. ## chemistry

Hi, I'm doing a post-lab report and I have no idea how to solve this question. It asks which of the following molecules would be useful in quenching benzophenone photoreduction. it then lists oxygen (s1 = 22kcal/mol), 9,10-diphenylanthracene (t1=42

asked by Alexa on February 16, 2017
40. ## Physics

Question about doppler effect: How do you solve when it gives you percentage value? (Q 1) How do you calculate for doppler effect when the listener is moving instead of the source of sound? (Q 2) Questions 1. As a racing car zooms by you, its pitch

asked by Tommy on November 25, 2009
41. ## psychology

You would be concerned about possibility of Rh incompatibility if A enzymes produced by the fetus infect the mother B bacteria from the mother cross the placenta and are transmitted to the fetus C antibodies produced by the mother are transmitted to the

asked by tzeni on January 7, 2009
42. ## MATHS

3 PUMPS WORKING 8 HOURS A DAY, CAN EMPTY A TANK IN 2 DAYS. HOW MANY HOURS A DAY MUST 4 PUMPS WORK TO EMPTY THE TANK IN 1 DAY?

asked by SEETHA on February 20, 2015
43. ## Physics

A 0.38-kg particle has a speed of 2.0 m/s at point A and kinetic energy of 7.5 J at point B. (a) What is its kinetic energy at A? J (b) What is its speed at point B? m/s (c) What is the total work done on the particle as it moves from A to B?

asked by Anonymous on September 27, 2011
44. ## calc check: hooke's law

A force of 27N is required to maintain a spring stretched from its natural length of 12cm to a length of 15cm. How much work is done in stretching the spring from 15 to 25cm? and this is what i did.. please check to see if i did it correctly.. thanks :)

asked by COFFEE on June 29, 2007
45. ## math

a baseball is hit straight up from a height of 6 feet with an initial velocity of90 feet per second. given the equations=-16t^2 +v0t + s0, that models the height of the ball,s, as a function of time ,t where the initial height of the ball is s0 and the

asked by sara on October 21, 2018
46. ## Spanish

Can someone please check my work? We all have new clothes. Write sentences using the elements below. Replace the direct objects with the correct direct object pronoun. 1. Aníbal/preferir (unas camisas de color rojo) Aníbal las prefiere. 2. Julieta y

asked by Larry on April 6, 2009
47. ## Foreign languages

Bob and Writeacher, I just wanted to inform you that my science project on water has been approved by the EU Commission. We'll be working on the project starting from September. (I will certainly need your help to work out a list of "scientific words"

asked by John on July 5, 2012
48. ## English

1. Wrie down your woriries and work in pairs to comfort/console each other by using the model dialogue in Part A. -------------- Can we use both verbs, comfort and console in this sentence? 2.I am worried about my brother who is into computer games. Why

asked by rfvv on March 11, 2016
49. ## human services

My Beliefs, Values, and Clinical Gestalt With Individuals and Systems Paper The paper must address what you are learning about your personal and professional assumptions about clinical helping and their relationship to your own beliefs, values, past

asked by patiance on August 29, 2010
50. ## mohale

Kwaito enrolled at university of johannesburg, his family gives him a pocket money that doesn't last for a month. So he decided to work at Ramodumo car wash next to his campus to make extra cash. A car wash agrees to pay him R55.00 per day and extra R10.00

asked by wisdom on March 1, 2015
51. ## Algebra

Mary, Margaret, Ron and Nick are to share a sholarship. Ron receives 1/3 of the scholarship; Nick gets 1/4 of the scholarship; Mary receives the same as Nick, and Margaret receives \$72,000. Find each person's share in the scholarship as well as the

asked by Michelle on January 10, 2013
52. ## math

this is dealing with line plots: if you have a box that has the following in it: number of clay models made by art club members in may 8 6 6 6 2 5 8 8 5 5 4 6 6 3 7 models in may then you have a line graph as such: how would you solve this? it just says

asked by monica on March 14, 2007
53. ## algebra

in 1995 the life expectancy of males in a certain country was 67.4 years. in 2000, it was 70.9 years let E represent the life expectancy in years t and let t represent the number of years since 1995. the linear fucntion E(t) that fits the data is E

asked by Dolores on July 23, 2009
54. ## Art

We are lookin at a painting by Alfred Jacob Miller called The Walters Art Museum 1.Look at the following illustration of an early American settler. It would likely inspire a writer to create story based on all of the following except A. The clothing worn

asked by Lovely on November 16, 2018
55. ## confidentiality in allied health

1.   Which one of the following statements is an example of hearsay? "The report said the patient died on January 15." "I saw the doctor administer the injection." "I checked the patient's blood pressure three times." "The report was on my desk when

asked by Anonymous on December 12, 2014
56. ## English III

Read this sentence from Abraham Lincoln's Second Inaugural Address: . . . let us strive on to finish the work we are in; to bind up the nation's wounds; to care for him who shall have borne the battle, and for his widow, and his orphan - to do all which

asked by Halo4Records on May 25, 2014
57. ## literature

Two quotes dealing with puns in act one and two in Romeo and Juliet.And a 3-5 analysis. Best look in the text for these items. Here's a link in case you left your book at school: http://shakespeare.mit.edu/romeo_juliet/index.html Once you have some ideas,

asked by michelle on April 24, 2007
58. ## physics

A mass m = 9.0 kg is attached to the lower end of a massless string of length L = 83.0 cm. The upper end of the string is held fixed. Suppose that the mass moves in a circle at constant speed, and that the string makes an angle theta = 21 with the

asked by sam on July 3, 2015
59. ## Math

Why would you use square roots in the following question: Chang is participating in a charity bicycle road race. The route starts at Centreville and travels east for 13 km to Eastdale. He then makes a 135° turn and heads northwest for another 18 km,

asked by Alex on September 25, 2014
60. ## Civics

Leaders from several states of a nation meet once a year to settle common issues. They govern their own states independently, but they work together on issues that affect them all like trade and defense. They do not have a central government that handles

asked by Student on April 28, 2015
61. ## Oral Presentations

I've got an upcoming speech to prepare, and my teacher has hardly given any preparation time and I'm the type of person who is very conservative and quiet. I'm afriad of being boring with my speech because our teacher has told us to make it interesting,

asked by TP on May 25, 2008
62. ## limiting position of the particle

A particle moves along the x axis so that its position at any time t>= 0 is given by x = arctan t What is the limiting position of the particle as t approaches infinity? Answer is pi/2 How do I solve this? Thanks a lot. You want to find the limit of

asked by Jen on October 20, 2006
63. ## chemistry

I have a problem that I need help with. The diameter of the oil molecule has to be calculated and presented in scientific notation. The data in the questions tells me that drop of oil(volume 0.05cm ^3) is released from a dropper onto the surface of the

asked by ruby on February 4, 2007
64. ## Math (Ratios)

Ok, I already know how to work ratios, but I'm confused on this question: Jessica had 3 pairs of tennis shoes and 3 pairs of sandals, What is the ratio of tennis shoes to sandals Jessica owned? Pair means 2 right? So would it mean 6 tennis shoes to 6

asked by Sydney on September 3, 2015
65. ## Physics

An electric force moves a charge of +1.40 x 10^-4 C from point A to point B and performs 4.70 x 10^-3 J of work on the charge. (a) What is the difference (EPEA - EPEB) between the electric potential energies of the charge at the two points? ____________J

asked by Mary on September 3, 2007
66. ## Chemistry

What is the strongest intermolecular force present in each molecule: H2S CF4 NH3 CS2 PCL3 N CH2O C2H6 CH3OH BH3 My work: Hydrogen bonding London dispersion Dipole dipole London dispersion Dipole dipole London dispersion Hydrogen bonding Hydrogen bonding

asked by Rose on February 28, 2016
67. ## Physics

a 61 kg skier on level snow coasts 184 m to stop from a speed on 12.0 m/s. A) use the work energy principle to find the coefficient of kinetic friction between the skis and the snow. B) suppose a 75 kg skier with twice the starting speed coasted the same

asked by Sarah on June 18, 2009
68. ## Math

I need to know if I did this right. Below is story problem. It has questions labeled a-f. Under each lettered question, I provided an answer, but I am not confident with my outcome. Can you read it over and tell me if I did it right? If not can you steer

asked by Heather C amendment to question on November 19, 2009
69. ## Statistic help

Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = + x (ii) Graph this equation on a scatter diagram. (Do

asked by Tracy on June 26, 2013
70. ## math

Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. yhat = + x (ii) Graph this equation on a scatter diagram. (Do

asked by Sue 12 on May 30, 2013
71. ## Social studies

Could you please check these other sets of terms. Here are the terms: scarcity cost benefit analysis marginal revenue needs incentives economy opportunity cost variable costs capitalism marginal cost food, clothing,shelter, and other things required for

asked by Sam on March 23, 2009
72. ## Physics

A spring is 16.2 cm long when it is lying on a table. One end is then attached to a hook and the other end is pulled by a force that increases to 28.0 N , causing the spring to stretch to a length of 19.0 cm . Part A What is the force constant of this

asked by Jess on November 24, 2017
73. ## Com 155

I need to know if I have found the errors for an assignment. Thanks! I put the corrections in parenthesis. Comparative forms of superlative adjectives: Since 1995, the third week in April has been TV-Turnoff week. A not-for-profit group in Washington,

asked by Ron on October 29, 2010
74. ## Biology

Mendel is the father of modern genetics, but there are some genetic characteristics that cannot be explained by simple Mendelian genetics. Such is the case with the human blood types in which there are 3 alleles for the same gene, A B, and o. A parent can

asked by Sherri on April 13, 2009
75. ## Maths

Three tired and hungry men went to sleep with a bag of apples. One man woke up, ate 1/4 of the apples, then went back to sleep. Later a second man woke up and ate 2/3 of the remaining apples, then went back to sleep. Finally, the third man woke up and ate

asked by Khris on October 21, 2013
76. ## Math help??

Find the missing length of the right triangle if a = 7 and b = 24. Read the followng and see if it hepls to solve this. If you still don't get it repost your answer. http://en.wikipedia.org/wiki/Pythagorean_theorem a sqaured+b squared=c squared 7

asked by carol on March 9, 2007
77. ## Science

I need help with a quiz. I just want to clarify these are correct. 1. Which of the following traits is acquired A. The number of petals that grow in a plant's flower B. The wing shape of a wild bird C. The ability of some gorillas to use sign language D. A

asked by Cosmic on January 19, 2019
78. ## Science

I need help with a quiz. I just want to clarify these are correct. 1. Which of the following traits is acquired A. The number of petals that grow in a plant's flower B. The wing shape of a wild bird C. The ability of some gorillas to use sign language D. A

asked by Cosmic on January 18, 2019
79. ## math (statistics)

The following table shows the percentage of individuals in each age group who use an online tax program to prepare their federal income tax return. AGE ONLINE TAX PROGRAM (%) 18-34 16 35-44 12 45-54 10 55-64 8 65+ 2 Suppose a follow-up study consisting of

asked by sarah on February 9, 2015
80. ## English

Can you check these sentences for me, please? Thank you 1) Eliot's The Waste Land is divided into five unequal sections which show no realistic or logical continuity. 2) The first four sections correspond to the four Greek classical elements of earth,

asked by Henry1 on May 14, 2011
81. ## Physics0

The currently accepted maximum depth limit for safe scuba diving while breathing air is 50 metres. What is the absolute partial pressure of oxygen at this depth? my solution was as the following, please correct me if I'm wrong: P=F/A Thus the pressure

82. ## chemistry

you extract 10 g of benzoic acid from an ether solution with aqueous NaHCO3 what is the min amount of concentrated HCl (37% by w/v%) that would be needed to convert the sodium benzoat back to free energy? (answer: 8.2 mL) I know that the 37% is basically

asked by Anonymous on October 26, 2009
83. ## Angular acceleration

A flywheel of 480 mm diameter is accelerated with an angular velocity of 0.4 rad/s^-2 from rest by an electric motor until it is rotating at 400 revs/minute. Calculate: a) the time of acceleration b) the linear speed of the rim of the flywheel My answer

asked by Jim (BIGEYE) on January 21, 2007
84. ## Physics

please tell me where I went wrong. A proton is moving parallel to a uniform electric field. The electric field accelerates the proton and increases its linear momentum to 5.0x 10^-23 kg m/s from 1.4x 10^-23 kg m/s in a time of 6.5x 10^-6 s. What is the

asked by Mary on August 31, 2007
85. ## Calculus AP

Let R be the region bounded by the graphs of y=cos((pi x)/2) and y=x^2-(26/5)x+1. A. Find the area of R. B. The vertical line x=k splits the region R into two equal parts. Write, but do not solve, an equation involving integrals that solves for k. C. The

asked by Jess on March 1, 2013
86. ## psychology

Marla is a 42-year-old Hispanic female who comes to the mental health clinic complaining of trouble sleeping, feeling “jumpy all of the time,” and an inability to concentrate. These symptoms are causing problems for her at work, where she is an

asked by Rose on July 4, 2009
87. ## math

Maximum or minimum values of the function f(x) = (1 – x)^2 e^x is: i need solution (a) Minimum value at x = –1; maximum value x = 1 (b) Minimum value at x = 1; maximum value x = –2 (c) Minimum value at x = 1; maximum value x = –1 (d) None of these

88. ## Chemistry

A solution with pH = 4 has 1. relatively high concentration of OH- 2. relatively low concentration of H3O+ 3. relatively high concentration of H3O+ 4. zero concentration of OH-

asked by nan on October 22, 2011
89. ## physics

A 10.0-kg cylinder rolls without slipping on a rough surface. At the instant its center of amss has a speed of 10m/s, determine (a) the translational kinetic of its center of mass (b) the rotational kinetic energy about its center of mass and (c) its total

asked by cyndi on January 29, 2007
90. ## Chemistry - DrBob222

CH3OH + MnO4- ----> Mn2+ + CH2O Earlier I posted this question and then realized that CH3OH didn't have a charge. It changed my work because the oxidation state changed. Can you check if what I fixed is correct? CH3OH- + MnO4- ----> Mn2+ + CH2O 1e-/C

asked by Alex on February 20, 2008
91. ## Physics

Betty weighs 427 N and she is sitting on a playground swing seat that hangs 0.22 m above the ground. Tom pulls the swing back and releases it when the seat is 0.88 m above the ground. The acceleration of gravity is 9.8 m/s2. How fast is Betty moving when

asked by brian on February 20, 2013
92. ## chemistry

In a reaction A to products, ,4.40 min after the reaction is started concentration of A is 0.588M. The rate of reaction at this point is rate= -change in concentration of A/change in time=2.2x10^-2Mmin^-1. Assume that this rate remains constant for a short

asked by Temmi on January 18, 2014
93. ## physics electricity

An electric force moves a charge of +1.65 multiplied by 10-4 C from point A to point B and performs 6.40 multiplied by 10-3 J of work on the charge. (a) What is the difference (EPEA - EPEB) between the electric potential energies of the charge at the two

asked by alex on January 3, 2010
94. ## AP Physics

6. a)A 1260 kg car accelerates uniformly from rest to 4.65 m/s in 2.6 s. Find the work done on the car in this time.Answer in units of J. b)Find the average power delivered by the engine in the first 1.768 s. Answer in units of W. c)Find the instantaneous

asked by jeff on February 26, 2011
95. ## Math

John is passing out RED, WHITE, and BLUE construction paper for an art project. There are (12) people in his group. John, who likes to show off, tells everyone to watch closely as he hands out the paper. The first person gets a RED paper. John puts the

asked by Amy on January 30, 2011
96. ## Physics

The process of inhalation in the lung may be modelled (very simplistically) by the pV diagram shown below , in which the pressure drops sharply in the lungs at constant volume, followed by expansion at constant pressure, and then finished by the pressure

asked by Sarah on March 19, 2013
97. ## Physics

The process of inhalation in the lung may be modelled (very simplistically) by the pV diagram shown below , in which the pressure drops sharply in the lungs at constant volume, followed by expansion at constant pressure, and then finished by the pressure

asked by Sarah on March 19, 2013

Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS = 7O2 --> 2Fe2O3 + 2SO2 Calculate the % yield. My Answer: nFeS=23.4g/87.92 g/mol =0.266 mol 4mol FeS /

asked by Sarah H on May 23, 2008
99. ## English

Thank you very much! I would like you to check these few more statements, too. 1) Summarise briefly (or briefly summarise) the history of England from the prehistory (or from its prehistoric inhabitants) to the Anglo-Saxon invasion (or to the Anglo-Saxon

asked by Franco on February 21, 2010