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

91,718 questions, page 233
1. Math

Hi again, I don't know how to solve this problem. cube root of(cube roof of(x-1)-1) It would be ninth root of 1/(x-1) Thank you. Do you think you can explain to me how did you solve it? what are your feelings about math, rate your math anxiety, and

asked by Lisa on March 3, 2007
2. Algebra

Please help me to solve this problem. Thank you in advance for helping to solve this problem. Have a great day. Here is the question? Find an equation of the line that passes through the two given points. Write the equation in slope-intercept form, if

asked by Jay on October 20, 2014
3. math

Find the values of theta (0,2pi) that satisfy sin theta= square root 3 over 2 Solve 2costheta sintheta-sintheta on (0, 2pi) please I really need help in knowing how to solve these questions. quite urgent. I don't understand how to do them at all.

asked by Temmick on December 13, 2013
4. Chemistry

What effect on the molar mass of the unknown acid would each of the following have-that is-would it make the calculated molar mass high, low, or would it have no effect? 1. Adding 5 drops of phenolphthalein instead of 1 drop. 2. Using a standard NaOH

asked by Sean on April 3, 2013
5. algebra 1

please help me solve this problem. The formula R=0.075 + 3.85 can be used to predict the world record in the 1500 meter run, t years after 1930. Determine an inequality that identifies the years in which the world record will be less than 3.7. Solve for t.

asked by thawk on November 18, 2010
6. science,technology and the environment

describe,compare and contrast induction and deduction as methods of science.using examples where appropriate.Identify and solve a problem using both induction and deduction.where appropriate illustrate why and how one would use experimentation and cycle of

7. Math

You are a letter and now your in a math problem explain to the numbers what your purpose is, how you are a friend, and how you solve algebra problems. Create a math problem and solve it. Use the letter and the number as the characters. Please tell me that

asked by Jordan on May 2, 2007
8. math- last time then i'm giving up

im sorry but this problem is part of a major grade i have in my pre-ap algerbrea 2 class.... ummm... okay lxl 0 2. Now solve lax+bl >or equal to c for x in terms of a, b, and c where a>0 and c>0 this help?

asked by arya on September 24, 2008
9. 1 more chem check.

Alright, here is my question: 22. References list the Ka value of hydrosulphuric acid, H 2S(aq) , as 1.1 x 10^–7 at 25°C. Assume a solution is prepared by dissolving 1.00 g of H2S(g) to make 1.00 L of acidic solution. What percentage of this solution

asked by Jacy on July 20, 2006
10. Geography

5. what causes earthquakes? a. Blocks of crust slide against one another, often at plate boundaries b. Pressure builds up in the molten rock beneath earths crust and causes it to shake c. Tectonic plates break apart into smaller plates, and the crumbling

asked by alyecce on October 1, 2018
11. college algebra

Suppose that the number of new homes built, H, in a city over a period of time, t, is graphed on a rectangular coordinate system where time is on the horizontal axis. Suppose that the number of homes built can be modeled by an exponential function, H= p *

asked by hilda on April 21, 2010
12. Chemistry

To what volume should you dilute 124mL of an 8.10M CuCl2 solution so that 49.0mL of the diluted solution contains 4.81g CuCl2? Molar Mass of CuCl2= 134.45 g/mol Convert: 4.81g * (1mol/ 13.45g CuCl2)= 0.0358mol CuCl2 [CuCl2]= M= mol/L= (0.0358mol/ 49ml) *

asked by Nyle on February 21, 2015
13. calculus

Consider curve given by x^2+ 4y^2= 7 + 3xy.. Three part question A) show that dy/dx = 3y-2x/8y-3x B) Show that there is a point P with x-coordinate 3 at whiich the line tangent to the curve at P is horizontal. Find the y-coordinate of P. C) find the value

asked by Jane on January 11, 2009
14. English

I need to revise these sentences. Can you please help me? 1) What music instrument do you play? Which music instrument do you play? 2) When does their show start? What time does the show start? 3) Do you have a lot of fun? You always talk around. (What

asked by Henry2 on January 12, 2012
15. Chemsitry

How do you find the amount in moles of excess reactant that reamins Please retype that, minding your spelling. =) Can you please show me how to determine the amount in moles of excess reactant that remains Sorry about the mistakes =) This is part of an

asked by Beautiful on February 24, 2007
16. chemistry

A student is asked to standardize a solution of barium hydroxide. He weighs out 0.986 g potassium hydrogen phthalate (KHC8H4O4, treat this as a monoprotic acid). It requires 27.8 mL of barium hydroxide to reach the endpoint. A. What is the molarity of the

asked by charlotte on October 5, 2015
17. Physics

If a supersaturated sugar solution is allowed to evaporate slowly, sugar crystals form in the container. Hence, sugar molecules go from a disordered form (in solution) to a highly ordered, crystalline form. Does this process violate the second law of

asked by S on November 25, 2012
18. Chemistry

When aqueous solutions of lead(II) ion are treated with potassium chromate solution, a bright yellow precipitate of lead(II) chromate, PbCrO4, forms. How many grams of lead chromate form when a 1.60-g sample of Pb(NO3)2 is added to 24.0 mL of 1.01 M K2CrO4

asked by Jamie lee on April 27, 2015

A solution is prepared by dissolving 3.44 g of sucrose, C12H22O11, in 118 g of water. a) What is the molality of the resulting solution? b) What is the mole fraction of water in this solution? B) moles of h2o=118g/18(g/mol)=6.5556 mol moles of c12h22O11=

asked by Kate on January 16, 2014
20. Social STUDIES

President John F.Kennedy said in his inaugural address "ask not what your country can do for you, ask what you can do for your country" 1.President Kennedy was calling on U.S citizens to a. renew their spirit of service to the nation b. have more

asked by Anonymous** on July 7, 2011
21. Physics

Two electrons are fixed 2cm apart. Another electron is shot from infinity and comes to rest midway between the two fixed electrons. A)Find the energy of the system initially( unknown quantity leave as a variable) B) Find the final energy of the system?(

asked by Eileen on March 28, 2012
22. MATH

1.)Find the exact solution algebriacally, if possible: (PLEASE SHOW ALL STEPS) sin 2x - sin x = 0 2.) GIVEN: sin u = 3/5, 0 < u < ï/2 Find the exact values of: sin 2u, cos 2u and tan 2u using the double-angle formulas. 3.)Use the half-angle formulas to

asked by MAKITA on April 10, 2009
23. medical transcription

Ten years ago I started working for DMD medical Supplies as a clerk. Six months ago I was promoted to Office Manager. I manage two people. My office provides secretarial support for the four members of the executive team. Two years ago, my boss Liz

asked by Charlene on August 14, 2011

1)What is the pH of a saturated solution of lead(II) hydroxide? The Ksp= 4.0e-15 Pb(OH)2 4.0e-15 = (x)(2x)^2 = 4x^3 I divided by 4 and took the cube root and got 1.12e-5 but I am not sure I took the cube root correctly. -log(1.12e-5)= 4.95 14-4.95 = 9.05

asked by Hannah on April 9, 2012
25. Physics - KE/inertia

The rigid body shown in Figure 10-66 (it is a triangle with the upper mass = to M and the bottom two corners/masses equal to 2M. The bottom side length equals .70 cm with point P in the middle of the side and the other two sides equal .55 cm)consists of

asked by COFFEE on March 27, 2007
26. Math

The Pioneer 10 spacecraft passed the planet Jupiter on December 12, 1973, and exited the solar system on June 14, 1983. The craft traveled from Mars to Jupiter, a distance of approximately 1 billion kilometers, in one year and nine months. a.Calculate the

asked by Aubrey on November 17, 2013
27. Chemistry

In the space below, show your work for determining the volume, mass, and moles of baking soda Moles of baking soda reacted Mass of baking soda reacted (g) Volume of baking soda reacted 140 ml of vinegar 5 tsps of baking soda were used

asked by Matt on October 6, 2013
28. algebra

you want to build a playhouse for your sister in your backyard. You have the blue print which show the playhouse is 13 feet long and 12 feet wide. you want to change the dimension such that the lenght will be decreased and the width will be increased by

asked by sue on October 15, 2014
29. Precalculus 11

I have kind of a general question... I'm working on a unit about solving systems of equations & I just feel like I've lost the general concept a little bit. When something says, "use your graphing calculator to solve the following systems of equations."

asked by Kayla on October 6, 2018
30. math

. what are the steps to solve this problem? 0.000027/0.000009 requirements: explain how to use scientific notation to solve the problem describe how to divide written in scientific notation give your final answer in simplest form.

asked by math help asap on November 12, 2014
31. Science ...Urgent plz

Describe, compare and contrast INDUCTION and DEDUCTION as methods of science – using examples where appropriate. Identity and solve a problem using both induction and deduction. Where appropriate illustrated why and how one would use experimentation/

asked by Sheer12 on October 27, 2008
32. chem

Water is the solvent and you can assume the density of water is 1.0g/cc. a.) What will be the amount of solute in grams if the volume is 500 mL and the concentration of solution is 15% w/w? The molar mass of the solute is H2SO4, 98.0g/mol b.) What is the

asked by Angel Locsin on November 29, 2012
33. English

1. Artists show feeling and ideas with colors. 2. Painters show feeling and ideas with colors. 3. Drawers show feeling and ideas with colors. ------------------------- Does 'artists' mean 'painters' or 'drawers'? Can musicians such as guitarists or

asked by rfvv on September 13, 2017
34. English

1. What is it like to live in the future? - It is like watching a magic show to live in the future. 2. What will it be like to live in the future? - It will be like watching a magic show to live in the future. 3. What would it be like to live in the

asked by rfvv on November 17, 2016
35. Mitchell, Art

Here is another Website that takes FOREVER to show what you need. At the bottom, if you click on each tiny rectangle you can get her statements and even under "Contact" her address in London. I sent her an e-mail as well requesting she provide that

asked by SraJMcGin on October 3, 2008
36. math

i need help with this question can u please show me how to figure this out and show me how you figured out the problem. the question is 1/3 pnut butter sandwiches 1/6 cheese and 9 ham how many total? i assume you mean how many sandwhiches total? in that

asked by felicia on May 23, 2007
37. Science ASAP

Can you tell me the Main Idea(s)? There’s an old saying that oil and water don’t mix. But sometimes they do — especially when a chemical called a surfactant brings the two together. Once blended, oil and water become tough to pull apart. Unless, that

asked by Anonymous on February 26, 2013
38. Algebra 2

I'm working on Lesson 6: Absolute Value Equations and Inequalities Algebra 2 A Unit 2: Expressions, Equations, and Inequalities and feel confident in my first few answers, but beyond that am lost. May I have some help? **=the answer I believe to be true

asked by Nina on September 23, 2017
39. math

Factor 2x²+13x+40 I thought with this sort of problem you are supposed to multipy 40 by 2 and get 80 and then come up with two factors that equal 13. If this doesn't work, you are supposed to factor out a number/variable. Since neither of these methods

asked by Rory on November 16, 2006
40. Chemistry

In the laboratory a student combines 41.7 mL of a 0.386 M iron(III) fluoride solution with 21.3 mL of a 0.616 M iron(III) bromide solution. What is the final concentration of iron(III) cation ?

asked by Anonymous on October 19, 2017
41. chemistry

The solubility of the oxidizing agent potassium permanganate is 7.1 g per 100.0 g of water at 25° C. What is the mole fraction of potassium permanganate (KMn04) in this saturated solution? What is the molality of the potassium permanganate solution?

asked by thanh on March 14, 2008
42. Chemistry

The addition of a crystal of sodium chlorate to a sodium chlorate solution containing no undissolved solute causes additional crystals of sodium chlorate to precipitate. The original solution was supersaturated or unsaturated

asked by Ang on November 30, 2014
43. science

a man of mass 80kg standing on a stationary frictionless trolley of mass 60kg has in his hands a parcel of mass 10 kg.He throws the parcel horizontally from the rear of the trolley at 4 m.s-1 in relation to the ground. 2.1 what is the total momentum of the

asked by Anonymous on February 9, 2010
44. Algebra II

Need help please. Thank you. 1. Determine whether the function has a maximum or minimum. State that value. f(x)= -2x^2-4x 2. Determine what c would in order to complete the square. x^2-5x+c 3. Solve the quadratic by factoring. 3x^2-16x+5=0 4. Solve the

asked by Michael on November 24, 2015
45. MATHS ASAP!!!!!

At the x axis, y is zero. So if the x intercept is (1,0) then (y-a)^2=x + b (0-a)^2=1 + b Now the vertex. (y-a)^2=x +b (2-a)^2= 0 + b or these two equations are.. a^2= 1+b or b= a^2 - 1 putting this into the second equation. 4-4a + a^2=a^2-1 solve for a,

asked by bobpursley on November 2, 2006
46. Calculus

I've been trying to solve the improper integral of ln(x)/sqrt(x) dx as a=1 and b=infinity I am required to solve for this question and according to my answer, it is divergent. However, my answer is infinity-4. Is it acceptable to say that infinity minus a

asked by Confused on February 28, 2013

Tony and Alice are trying to reduce the amount of television they watch. For every hour they watch television, they have to put \$2.50 into savings. The table shows how many hours of television Tony and Alice have watched in the past two months. Tony watch

asked by STEPHON on October 2, 2014
48. material balance

In a process for concentrating 1000kg of freshly extracted orange juice containing 12.5 wt% solids, the juice is strained, yielding 800kg of strained juice and 200kg of pulpy juice.the strained juice is concentrated in a vacuum evaporator to give an

asked by maya on March 23, 2014
49. Calculus AP

Let R be the region in the first quadrant bounded by the graph y=3-√x the horizontal line y=1, and the y-axis as shown in the figure to the right. Please show all work. 1. Find the area of R 2. Write but do not evaluate, an integral expression that gives

asked by Jess on March 1, 2013
50. maths exponential functions

Hi I have a Maths quiz on Monday and i have been of sick for the past week. I received these review questions from my teacher via email and he isn't replying to my questions i really do not get these questions if someone can do these and explain to me how

asked by TroubleInMathedise on March 13, 2011
51. english-grammar

I am writing an essay and am not sure If I should combine these two sentences with a semi colon or just leave them separate. Please help! (It may take...will be fruitful) I have found that nothing can be accomplished without hard work. It may take a large

asked by Hannah on August 14, 2012
52. Language Arts

hink about the work you completed in your reading character role. Determine the ideas that would be most worthy to share in a literary discussion about Johnny Tremain. Provide an explanation for your choices. How did the role you selected and the work you

53. Electrochemistry

Is it possible to separate platinum, palladium, and iridium as chloro-complex ions from an HCl solution through electrolysis if the solution is a constant 1.0 molarity in chloride ions and 0.020 molarity in each complex ion? The E values for the half

asked by Jeff on December 23, 2018
54. chemistry

a 10.0mL sample of an unknown H3PO4 solution requirs 112mL of 0.100 M KOH to completely react with the H3PO4. What was the concentrartion of the unknown H3PO4 solution? H3PO4 + 3KOH -----> 3H2O + K3PO4 Ive seen these problems with one volume but not two

asked by Monique on November 3, 2011
55. chemistry

A student weighs out 0.568 g of KHP (molar mass = 204 g/mol) and titrates to the equivalence point with 36.78 mL of a stock NaOH solution. What is the concentration of the stock NaOH solution? KHP is an acid with one acidic proton. a. 3.15 M b. 0.0757 M c.

asked by mathew on October 12, 2014
56. chemistry

When 5.00 g of barium hydroxide are added to 250.0 mL of 0.250 hydrochloric acid in a calorimeter, the temperature off the solution increases from 25.0 C to 28.0 C. Calculate the enthalpy ( in kJ per mole of water) given the density of the hydrochloric

asked by Jen on June 1, 2013
57. Chemistry

Hi Can someone please help me undersand how to get the answer to this question A 15.0 mL solution of 0.050 mol/L AgNO3 was titrated with 0.0250 mol/L NaBr in the cell SCE || titrated solution | Ag(s) Find the cell voltage for 10.0 mL of titrant added. (a)

asked by James on April 26, 2010
58. chem??????????????????

YEs, it is the correct balanced equation bobpursley A 2.80 mol/L solution of iron (II) dichromate is combined with 5.00L of a 2.25 mol/L acidic solution of tin (II) bromide. Calculate the volume of iron (II) dichromate required. FeCr2O7 + SnBr2 --> SnCr2O7

asked by bobpursley on May 16, 2007
59. Chemistry

What is the final concentration (M) of a solution prepared by diluting 50.0 mL of a 6.00 M KCl solution to a volume of 0.500 L? A. 1.67 B. 0.600 C. 0.0167 D. 3.0 E. none of these My initial thought was to take the 6.00 M KCl/0.500 L, for an answer of 12.

asked by Coug on November 21, 2009
60. Chemistry

1 g of acid was mixed with 120 ml of distilled water and the solution was filtered into a clean dry beaker. A 25 ml aliquot of this solution was titrated with 0.1120 M NaOH. The pH of the acid was recorded to be 4.42. Calculate the initial concentration of

asked by Annie on March 25, 2013
61. Chemistry

I have 93.954 mL of a generic cola solution. The solution contains: Molarity of H++1.005e-7 Molarity of OH- = 1.005e-7 Molarity of Sucrose(aq) = 6.386e-1 Molarity of Dye= 5.322e-3 Calculate the mass percent, molarity, molality and mole fraction.

asked by Emily on November 3, 2011
62. Predicting products for electrolysis

when you have your 4 different equations to form 4 different possible equations, what two equations do you use for water, O2(aq) + 4H+ + 4e- ----> 2H20 (+1.23) 02 (g) + 2H2O (l) + 4e- ----> 4OH- (+0.40) 2H20 (l) + 2e- ---> h2 (g) + 2OH- (aq) (-0.83) I'm

asked by Sienna on January 16, 2007
63. College Chemistry

A buffer solution contains 0.120M acetic acid and 0.150M sodium acetate. a. How many moles of acetic acid and sodium acetate are present in 50.0 ml of solution? b. if we add 5.55 mL of 0.092M NaOH to the solution in part (a) how many moles of acetic acid ,

asked by Elizabeth on November 10, 2010
64. Chemistry

I think I made a mistake with my previous question. I have two solutions potassium thiocyanate (KSCN) and iron (III) chloride (FeCl3). The reaction is Fe+++(aq) + SCN-(aq) FeSCN++(aq) What will happen if the solution is heated? Will the reaction rate shift

asked by Fiona on May 2, 2007
65. physics

I am having some difficulty with a few problems on my homework and I'm hoping to get some insight. the first one: a robotic space probe of mass 7600 KG is traveling through space at 120 m/s. Mission control determines that a change in course of 30.0

asked by H.M. on April 13, 2009
66. Math

How do I write the Symmetric Equation of a line given the following parametric equations: (where t is a scalar) x=0t y=0t z=1+1t I know normally I would solve each equation for t and set the equations equal to one another. However, I can not solve for t in

asked by Dwight on November 3, 2010
67. 5th grade math (dividing fractions)

Hi.. I need help figuring out this problem, sovling for x: 3 divided by x/9 = 5 and 2/5 I was able to solve: x divided by 3/4 = 6 by multiplying 6 x 3/4 = 4 1/2. Just not sure how to solve the first problem. If I change 5 2/5 into mixed number,I still

asked by Alex on December 9, 2012
68. Math

How do I write the Symmetric Equation of a line given the following parametric equations: (where t is a scalar) x=0t y=0t z=1+1t I know normally I would solve each equation for t and set the equations equal to one another. However, I can not solve for t in

asked by Dwight on November 4, 2010
69. input output

I'm in 12th grade. But I find this 6th grade problem a bit CHALLENGING. X: 4 12 Blank Blank Y: 6 18 Blank 60 Someone please solve this. Like.. WHAT. (Solve the blanks)

asked by lucas on January 26, 2016
70. Math

Precalc stuff.. square root of z-1= square root of z +6 are you solving for z? square both sides then solve for z. that's my problem, i'm not sure how to solve for z. i need a process. it's not in my book or anything.

asked by Blondie on March 7, 2007
71. Chemistry

Consider this system at equilibrium. A(aq) B(aq) Delta H = +750 kJ/mol .. What can be said about Q and K immediately after an increase in temperature? a] Q > K because Q increased.. b] Q>K because K decreased.. c] Q

asked by Tracy on March 5, 2012
72. math

Four boxes of cereal are to be selected at random from a continuous process that fills boxes labeled "Contents: 340 g." The contents of the first three boxes are found to weigh 339.0g, 337.7 g, and 338.9 g. (a) What minimum weight of cereal must the fourth

asked by david on September 23, 2012
73. Science

PLEASE DO NOT THINK I AM CHEATING AND ASKING FOR ANSWERS. DO NOT LECTURE ME, I AM SIMPLY ASKING WHAT IN THE HELL THIS MEANS: Collecting and Analyzing Data There are two types of observations: qualitative and quantitative. Qualitative observations use words

asked by D on August 28, 2017
74. Physics

A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of

asked by jan on March 13, 2016
75. Phys

A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of

asked by Sara on March 13, 2016
76. Physics

A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of

asked by fatma999 on March 12, 2016
77. Physics

A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of

asked by jojo on March 13, 2016
78. Bio

Proteins are manufactured from the "blueprints" found on DNA. After they are translated, they are moved through a system of internal membranes before being distributed throughout the rest of the cell. At some point in this process, they are modified to

asked by Barbiie Abreu on June 1, 2010
79. Acid-Base chem

Which of the following would for a buffer if added to 250.0 mL of .150 M SnF2? a).100 mol HCl b).060 mol HCl c).040 mol HCl d).040 mol NaOH e).040 mol HF I figured I could find out the pH of the solution with HCl/NaOH/HF added, and then find the pH when

asked by Taylor on May 5, 2007
80. Math! Help! Help! Help!

Hello a compound with: density of: .80 g/cm^(3) volume of: 1ML what is the mass? How do you conver this? mass = volume x density solve for mass volume = 1 mL = 1 cc = 1 cm^3 density = 0.8 g/cc plug and chug Post your work if you don't understand this and

asked by Amber on January 31, 2007
81. Calculus

I am stuck on both of these questions. Would you please tell me if my reasoning is correct? 1. An object is dropped off a building. When comparing the average velocity of the object over equal time intervals, explain the difference between early time

asked by Sarah on April 10, 2014
82. college

Rs 150 will be given to cultivate one hectare of land.A and B can do this work 12 hours.B and C can do it in 15 hours and C and A ca do it in 10 hours.How much each will get if all the three work together?

asked by Rambabu on January 20, 2010
83. Math

Set up an equation that can be used to solve the problem. Solve the equation and answer the question asked. A car rental agency charges \$250 per week plus \$0.25 per mile to rent a car. How many miles can you travel in one week for \$450

asked by gokp on July 25, 2012
84. chemistry

A solution containing 5.00g of solid Al2(CO3)3 dissolved in water to a total volume of 200. mL is combined with 140. mL of 1.0 M HBr. Write the total of ionic equation for the reaction described below and find the molar concentration of all ions remaining

asked by SELDIL on April 16, 2012
85. Molecular cell Biology

The following chemicals have the indicated formula weights:Sucrose-342.3,Potassium dihydrogen phosphate(KH2PO40-136.09,Tris -121.14.You also have the following solutions made:20%SDS,5M NaCl,500mM EDTA.You have a 40%glycerol solution and 10X TBE.List the

asked by Caroline on January 18, 2014
86. English

Question: Much of the writing in Animal Farm uses verbal irony or situational irony to make a point. List three examples of verbal or situational irony and then state what is really meant in the passage or what actually happens in the plot. Answer: Animal

asked by AyPa on June 24, 2010
87. English

What does Lian Dolan mean in “Carrying Your Own Skis” when she says that “skiing was work”? A. Skiing was not at all enjoyable. B. Skiers then did not have the conveniences they have now. C. Skiing was a very expensive sport, and you had to work

asked by Asther on October 8, 2014
88. physics

a block (mass m1) on a smooth horizontal surface, connected by a thin cord that passes over a pulley to as second block (m2), which hangs vertically. Ignore friction and the masses of the pulley and cord. If m1 = 13.0 kg and m2 = 6.0 kg determine the

asked by physics on July 14, 2009
89. College Physics

Suppose a 10.0 kg fireworks shell is shot into the air with an initial velocity of 62.0 m/s at an angle of 80.0 degrees above the horizontal. At the highest point of its trajectory, a small explosive charge separates it into two pieces, neither of which

asked by Marqueta on December 3, 2014
90. Math

I need help calculating the finance charge and new balance using the previous balance method. Previous balance = \$179.32 Annual rate = 16% Finance charge = \$ ? New purchases = \$117.42 Payments/credits = \$85.00 New balance = \$ ? I also need help calculating

asked by Ralph on January 26, 2010
91. chem

Show the calculation of (1) the expected grams of salicylic acid (C7H6O3) formed in the reaction of 1.75 grams of methyl salicylate (C8H8O3) with excess NaOH and then show the calculation of (2) the % yield if the actual yield of salicylic acid is 1.19

asked by emily on March 12, 2015
92. College Physics

Two iron spheres contain excess charge, one positive and the other negative. a) Show how the charges are arranged on these spheres if they are very far from each other. b) if the spheres are now brought close to each other, but do not touch, sketch how the

asked by Jen on January 21, 2008

Calculate the position of the center of mass of the following pairs of objects. Use acoordinate system where the origin is at the center of the more massive object. Give youranswer not in meters but as a fraction of the radius as requested. Get data from

asked by john on February 28, 2012
94. Chemistry-Is this correct?

The concentration of NaOH is normally in the range of 3-6 M when they peel potatoes and soak them in a solution of NaOH , remove them and spray them off. If I have 45.7 mL of 0.500M of H2SO4 required to react completely with a 20.0 mL sample of NaOh. What

asked by Sara on May 20, 2010
95. Chemistry

What does it mean to say that a solution is saturated with a solute? (Select all that apply.) a) A solute that is at equilibrium with undissolved solvent. b) A solvent that is at equilibrium with solute. c) A solution contains the maximum amount of solvent

asked by Michael on May 12, 2010
96. Physics

(a) Determine the amount of work (in joules) that must be done on a 95 kg payload to elevate it to a height of 1007 km above the Earth's surface. 1 ? MJ (b) Determine the amount of additional work that is required to put the payload into circular orbit at

asked by Steve on March 21, 2011
97. Physics

A 2.0kg object is moving at 3 m/s. A 4-N force is applied in the direction of motion and then removed after the object has traveled an additional 5m. The work done by this force is. Would the answer be simply: W=F*d= (4* 5m)= 20N and you only take the

asked by Nancy on November 4, 2006
98. Science

An engineer discovered that a TV set was receiving too much voltage to work properly. Which of the following circuit parts should the engineer add to make the TV set work properly? A:switch B:insulater C:resistor D:conductor I think C is the right answer.

asked by Evie on May 3, 2017
99. physics

a) What is the minimum work needed to push a 900 kg car 410 m up a 17.5° incline with zero friction? If i know this answer is 1.08e6 what equation should i use for the next part because the one i used was wrong (b) What is the minimum work needed if the

asked by bill lin on March 1, 2011
100. physics

What is the average useful power output of a person who does 5.50×106 J of useful work in 6.50 h? Working at this rate, how long will it take this person to lift 1850 kg of bricks 1.20 m to a platform? (Work done to lift his body can be omitted because it

asked by stephanie on November 14, 2017