# 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 284
1. ## math

Ashley can ride her bike to work in 2/3 of an hour. When she drives to work it takes 1/3 of an hour. If she drives 12 miles per hour faster than she rides her bike, how fast does she ride her bike?

asked by morgan on March 1, 2011
2. ## math

Samantha can ride her bike to work in 2/3 of an hour. When she drives to work it takes 1/3 of an hour. If she drives 12 miles per hour faster than she rides her bike, how fast does she ride her bike?

asked by Bob on February 7, 2011
3. ## Chemistry repost

Whoever you are -- Please DO NOT USE TUTORS' NAMES where your name or nickname should be. ~~~~~~~~~~~~~~~~~~~~~~~~~~ as i earlier posted and , 1 day ago , i am confusesd hw we ll find freezing point......isnt it T pure solvent - T solution .. which ll be

asked by Writeacher on January 25, 2009
4. ## Physics help

Are you sure that's how you do #4 because they have 2 different directions. I need physics help. I don't understand how to do these questions. Can someone show me what I should use? and explain. I'll do calculations by myself. A stationary curling stone is

asked by HENRY - I NEED YOUR HELP? on January 28, 2016
5. ## Physics

A horizontal force, F1 = 85 N, and a force, F2 = 18.4 N acting at an angle of θ to the horizontal, are applied to a block of mass m = 2.1 kg. The coefficient of kinetic friction between the block and the surface is μk = 0.2. The block is moving to the

asked by Harry on October 9, 2014
6. ## CHEMISTRY

1) An NaOH solution of unknown concentration is titrated with HCl. 51.9 mL of 0.400 mol/L HCl will neutralize 75.0 mL of the NaOH. What is the concentration of the NaOH solution ? Record your answer in decimal notation. I think the answer is 0.277 mol/L.

asked by TIANDRA on January 31, 2012
7. ## accounting

Neer Department Store uses the retail inventory method to estimate its monthly ending inventories. The following information is available for two of its departments at August 31, 2011. Sporting Goods Jewelry and Cosmetics Cost Retail Cost Retail Net sales

asked by Sara on March 29, 2011
8. ## AP CHEM

I would really appreciate some help on this problem. =) At 218 C, Kc = .00012 for the equilibrium NH4HS(s) NH3(g)+ H2S(g) Calculate the equilibrium concentrations of NH3 and H2S if a sample solid NH4HS is placed in a closed vessel and decomposes until

asked by Jenn on March 15, 2007
9. ## physics

A force of 8 N acts on a 2 kg object as it is displaced along the x-axis. The speed of the object when it is at x= 2m is 5 m/s. a) what is the net work done by F(x) on the object as it is displaced from x=2m to x=8m? sol) 8m - 2m = 6m; 6m * 8N = 48 J b)

asked by Matt on March 13, 2007
10. ## Chemistry

A 25 mL sample of waste water was treated with acid and SCN- to form an intense red complex. This complex was diluted to 100.0 mL and put in a variable pathlength cuvet. For comparison, a 10.0 mL reference sample of 6.8 x 10-4 M Fe3+ was treated with acid

asked by Ken on November 27, 2011
11. ## PHYSICS

You throw a 20-N rock vertically into the air from ground level. You observe that when it is a height 14.8m above the ground, it is traveling at a speed of 25.0m/s upward. A) Use the work-energy theorem to find its speed just as it left the ground. What is

asked by Garrett on March 17, 2014
12. ## Physics

You throw a 20-N rock vertically into the air from ground level. You observe that when it is a height 14.8m above the ground, it is traveling at a speed of 25.0m/s upward. A) Use the work-energy theorem to find its speed just as it left the ground. What is

asked by Garrett on March 17, 2014
13. ## Algebra

In six years Jill will be twice as old as Amanda. One year ago Jill was nine times older than Amanda. How old is Jill now? I tried 6 + 2x = x because in six years Jill will be twice Amanda's age, but this doesn't work. I need a formula to work out but

asked by Gail on April 14, 2017
14. ## science

how would you make 500.0mL of a 0.200M NaOH solution from a 15.0 M stock NaOH solution?? I assume that you want the volumes rather than the mechanics of carrying it out? a) How many moles do you need in the 500 ml to have 0.200 M? b) What volume of 15.0 M

asked by Mel on April 5, 2007
15. ## Calculus

dy/dx= (y^2 -1)/x 1. Give the general equation of the curves that satisfy this equation. 2. Show that the straight lines y=1 and y=-1 are also solutions. 3. Do any of the curves you found in 1) intersect y=1? i started by dy/(y^2 -1)= dx/x and found that

asked by Hebe on November 4, 2006
16. ## Biology :)

Consider the following situation. A cell is in a solution that contains dissolved oxygen. As the cell uses oxygen for respiration, a. oxygen will be carried across the cell membrane by special transport molecules. b. oxygen will naturally diffuse out of

asked by Anonymous on December 31, 2015
17. ## science

A jellyfish can propel itself with jets of water pushed out of its bell, a flexible structure on top of its body. The elastic bell and the water it contains function as a mass-spring system, greatly increasing efficiency. Normally, the jellyfish emits one

asked by Anonymous on December 3, 2014
18. ## physics

A jellyfish can propel itself with jets of water pushed out of its bell, a flexible structure on top of its body. The elastic bell and the water it contains function as a mass-spring system, greatly increasing efficiency. Normally, the jellyfish emits one

asked by Jason on November 29, 2014
19. ## science

A jellyfish can propel itself with jets of water pushed out of its bell, a flexible structure on top of its body. The elastic bell and the water it contains function as a mass-spring system, greatly increasing efficiency. Normally, the jellyfish emits one

asked by Jason on November 30, 2014
20. ## science

A jellyfish can propel itself with jets of water pushed out of its bell, a flexible structure on top of its body. The elastic bell and the water it contains function as a mass-spring system, greatly increasing efficiency. Normally, the jellyfish emits one

asked by Anonymous on December 1, 2014
21. ## Physics desperate Help!

A 2.0 kg lunch box is sent sliding over a frictionless surface, in the positive direction of an x axis along the surface. Beginning at time t=0, a steady wind pushes on the lunchbox in the negative direction of the x-axis. Estimate the kinetic energy of

asked by Krystal on October 26, 2006
22. ## maths

2(n-5) = 4 (n+2) Solve the equation is the answer -0.3 ? 2(n-5) = 4 (n+2) Solve the equation is the answer -0.3 ? If the intent of 4 (n + 2) is 4 times (n + 2), Expanding, 2n - 10 = 4n + 8 Therefore, 2n = -18 making n = -9. If the intent of 4 (n + 2) is 4

asked by asa on April 14, 2007
23. ## Physics

A wheel with a weight of 395N comes off a moving truck and rolls without slipping along a highway. At the bottom of a hill it is rotating at an angular velocity of 23.0rad/s . The radius of the wheel is 0.607m and its moment of inertia about its rotation

asked by l on April 11, 2014
24. ## Chemistry

Explain how the calculated molarity of the potassium permanganate would be affected by each of the following experimental errors. In each case, you must also state if the calculated molarity is higher or lower than the actual morality. a) Some sodium

asked by 4B on December 1, 2011
25. ## Chemistry

Explain how the calculated molarity of the potassium permanganate would be affected by each of the following experimental errors. In each case, you must also state if the calculated molarity is higher or lower than the actual morality. a) Some sodium

asked by P102 on December 1, 2011
26. ## chemistry

When 0.752 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 12.2C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to

asked by nickel on February 9, 2007
27. ## physics

A) Assume the mass of a pendulum is 3kg. Calculate the work done by the pendulum on the mass from 0 degrees to 180 degrees ( you will need to integrate with respects to d(theta ) instead of dx given: the mass at the end of the string experiences a

asked by Spice on December 7, 2015
28. ## social studies and an essay thanks

A revolution is an overthrow of the government or politic system by the people who they govern. Violence is an act of aggression and anger. Violence is never the way for justice; but according to a reactionary violence is the way. They argue violent

asked by gube on May 1, 2007
29. ## spell

Should Illegal Immigrants Be Allowed Into The U.S? Illegal immigrants should be allowed into America. An illegal immigrant is any person who enters the United States illegally, or any person who enters legally and stays past the time allowed. There are

asked by Walker on March 4, 2008
30. ## Chemistry

I am required to design an experiment which will allow me to produce exactly 12.5g of pure dry Copper Hydroxide. I need to include equipment required, Chemicals required, step by step method and any particular limitations/cautions which must be exercised

asked by Rachel on October 12, 2010
31. ## physics

A surveyor measures the distance across a straight river by the following method. Starting directly across from a tree on the opposite bank, she walks 90 m along the riverbank to establish a baseline. Then she sights across to the tree. The angle from her

asked by Zoe on October 4, 2009
32. ## physics

A surveyor measures the distance across a straight river by the following method. Starting directly across from a tree on the opposite bank, she walks d = 72 m along the riverbank to establish a baseline. Then she sights across to the tree. The angle from

asked by mo on September 8, 2010
33. ## HRM

o Name three selection tools that you would consider using for a hiring program at a supermarket. o Choose what you think is the best selection tool or combination of selection tools. o Justify your choice by describing the advantages of your method

asked by scooby9132002 on September 23, 2009
34. ## maths

A small business predicts sales according to a straight line method. if sales were\$110000 in the first year and \$2000000 in the fourth year find the rate of growth in sales per year .......text book answer is \$30,000 per year

asked by sultana on December 23, 2016

Catherine borrowed \$19,000 on June 20, at 10% interest. If the loan was due on September 17, what was the amount of interest on the loan using the exact interest method? (Round to the nearest cent) (Points : 2) \$500.01 \$273.06 \$463.00 \$463.29

asked by Anonymous on June 22, 2013
36. ## calculus

how do i use a taylor series centered at some x value to approximate the value of the function centered at a different x value? for example, if im given some taylor series centered at 5 of f(x) but i want to find f(3), how do i do this? (btw that example

asked by Marli on March 15, 2011
37. ## CHEMISTRY

Method for getting correct answer for this? Thank you! For the reaction A ↔ 2B K = 3.80x10-7 , if one started with 0.154 M A approximately how much A and B would there be after equilibrium had been established? a. very little A, 0.154 M B b. 0.126 M A;

asked by Chemistry on April 6, 2014
38. ## Chemistry

You have to prepare a pH 3.50 buffer, and you have the following 0.10M solutions available HCOOH, CH3COOH, H3PO4,CHOONa, CH3COONa, and NaH2PO4. a) What solutions would you use? b) How many milliliters of each solution would you use to make approximately 1

asked by Caitlin on April 21, 2015
39. ## Physics

The ball spins at 7.7 rev/s. In addition, the ball is through with a linear speed of 19 m/s at an angle of 55 degrees with respect to the ground. If the ball is caught at the same height at which it left the quarterback's hand, how many revolutions has the

asked by Christopher on December 21, 2009
40. ## physics

To push a 25.0kg crate up a frictionless surface incline angled at 25 degrees to the horizontal, a worker exerts a force of magnitude 209N parallel to the incline. As the crate slides 1.50m, how much work is done on they crate by (a) the worker's applied

asked by Lyss on November 2, 2010
41. ## physics

you push a physics book 1.50m along a horizontal tabletop with a horizontal push of 2.40 N while the opposing force of friction is 0.600 N. How much work does each of the follwing forces do on the book? A) you 2.40N push. B) the friction force. C) the

asked by Sarah on June 18, 2009
42. ## Social Studies

The largest mass migration in human history has taken place in China. Why? a. Chinese are seeking political amnesty in other countries b. Chinese are moving from the rural areas to work in urban factories c. Workers are leaving the rural areas to work in

asked by Kaai97 on October 30, 2015
43. ## Math-Geometry

Find the angle that the hr hands and the mins hand made when it at 10:00:45.67 so it 10olock 00 min and 45.67 sec and find the angles Show works it one of those clocks problem -thanks We're asked "Find the angle that the hr hands and the mins hand made

asked by Bob on September 16, 2006
44. ## History

1.)Which group believed that only a powerful government could safeguard liberty? A.)Federalists B.)Anti-federalists A? 2.)Which group believed that people needed the protection of a national government? A.)Federalists B.)Anti-federalists A? 3.)Which group

asked by YRN DJ on November 9, 2015
45. ## U.S History

Which group believed that failure to approve the Constitution would lead to chaos and mob rule? Federalists**** Anti-federalists 2. Which group believed a strong national government was critical to the country? Federalists*** Anti-federalists 3. Which

asked by Kenxie on June 7, 2015
46. ## chemistry

An Ideal solution is formed by mixing 0.26 mol of pentane (vapor pressure + 511 torr) with 0.34 mol of hexane (vapor pressure = 150 torr). What is the total vapor pressure of the ideal solution?

asked by Anonymous on March 6, 2014
47. ## Chemistry

The absorbance of a chlorophyll a standard solution in ethanol (density = 0.785 g/mL) is measured in a 1.3 cm cuvette or path length. The absorbance is 0.435 and the molar absorptivity coefficient is 86,300 M–1cm–1. The molecular weight for chlorophyll

asked by Anonymous on July 16, 2012
48. ## Calculus

We're doing a lab in my Calc II class and I'm stuck on this question. I tried to do it by looking at instructions for a similar question in the book, but it made me more confused. Here is the question and my work: Find the area of the region enclosed by

asked by Jenna on September 10, 2009
49. ## chemistry

OKOK I know that I have posted this question but I just don't understand the last part. 50.0 ml of a 0.0500 M solution of lead (II) nitrate is mixed with 40.0 ml of a 0.200 M solution of sodium iodate at 25°C. Calculate the Pb2+ and IO3- concentrations

asked by mel on May 16, 2007
50. ## Physics

A certain number of identical resistors are connected in series and their total resistance is measured. When the resistors are disconnected and re-connected in parallel, their total resistance drops to one-percent of the value measured when they were

asked by Tim on November 9, 2016
51. ## managerial economics

Players A and B are playing a simultaneous moves game and both can choose either strategy S1 or strategy S2. If both choose S1 both receive 0. If both choose S2 both receive -2. If their chosen strategies differ they both receive -4. (a)Write out a table

asked by matherik on September 7, 2008
52. ## chemistry

Suppose that a compound Z had a partition coefficient of 8 in ether-water. If 10g of z was dissolved in 100mL of water, and if the water solution was extracted with two 100 mL portions of ether, answer the following questions a) what is the total amount of

asked by carol on February 13, 2011
53. ## language arts help please

9. Which sentence uses the past form of an irregular verb? My friend is keeping a journal. Adam has seen that show twice. Elsa gave me this book. We listened to the weather report.*** 10. What does the present perfect tense show? action that began in the

asked by jam jam jam on November 20, 2017
54. ## Math calculation

A stock bottle contains 2.5 L of solution. How many 2 oz bottle can be filled using the stock solution?

asked by Samantha on May 16, 2016
55. ## chemistry

If you have a solution that is 1.7 M sodium chloride and you have 1 L of that solution, how many moles of sodium chloride do you have?

asked by emily on October 28, 2011
56. ## AP Chemistry

If the pH of a nitric acid solution is 2.34, then what is the molarity of nitric acid in the solution? A. 1.6 × 10-4 M B. 3.8 × 10-3 M C. 2.2 × 10-2 M D. 4.6 × 10-3 M

asked by jessica on September 14, 2016
57. ## Chemistry (quick clarification please?)

Is 50 ml of a 50 mM solution of NaCl the same concentration as 100 ml of a 100 mM solution of NaCl?

asked by Anne on September 5, 2012
58. ## Math calculation

A stock bottle contains 2.5 L of solution. How many 2 oz bottle can be filled using the stock solution?

asked by Samantha on May 14, 2016
59. ## Calculus

Find the particular solution of the differential equation particular solution of the differential equation dy/dx=(x−7)e^(−2y).

asked by Robin on November 15, 2013
60. ## Algebra 2

1. Find the midpoint and the distance between the points (8,–6) and (13, 4). 1. (4, –3), 10 units 2. 3. 4. (10, –1), 9 units 2. Find the vertex and the focus of the parabola with the equation 4y = x2 – 12x + 52. 1. V(6, 4), F(6, 5) 2. V(6, 4), F(7,

asked by Ben on June 4, 2011
61. ## Algebra word prob

I don't have a graphing calc so I need help with this one. A batter hits a fly ball. A scout in the stands makes the following observations. There is a table with time (seconds) and height (feet) in correspondence to each other time is .75,1.5,2,3.25,4.75

asked by Taylor95 on September 10, 2013
62. ## Physics newton

A rocket weighs 1 x10^7 N while on the surface of the earth. The ignition of its engines results in a lift off force of 1.5 X 10^7 N a) what is the mass of the rocket. b) what is its acceleration at lift -off c)How fast will it be moving if it acceleartion

asked by harry on November 5, 2006
63. ## rounding numbers

I need to to round 423,607,492 to the ten thousands. I then need to round it to the million. Can someone help me. I will be happy to check your work. Which numeral is in the ten-thousand place in this number? Which numeral is in the million place? Once you

asked by Don on April 18, 2007

Making inferences is an abstract critical thinking skill that involves the active and blended use of several sources of information, including a.)the application of the basiic method of problem solving b)using background knowledge,personal experience, and

asked by Michelle on October 10, 2010
65. ## history

What was the impact of the Napoleonic Code? It became the set of civil laws adopted throughout Europe and other parts of the world. It was the central method of determining criminal punishment in all French-held territory under Napoleon. It established a

asked by Bri on March 30, 2018
66. ## Statistics

In advance of the 1936 Presidential Elections, a magazine titled Literary Digest released the results of an opinion poll predicting that the republican candidate Alf Landon would win by a large margin. The magazine send post cards to approximately

asked by Ashley on August 28, 2015
67. ## Physics

An elevator cable breaks when a 950 kg elevator is 23 m above a huge spring (k = 2.3×105 N/m) at the bottom of the shaft. (a)Calculate the work done by gravity on the elevator before it hits the spring. (b) Calculate the speed of the elevator just before

asked by Sasha on November 17, 2010
68. ## CHEMISTRY QUESTION

Imagine you have a light bulb and battery conductivity tester. You are given a dilute solution of copper sulfate and a dilute solution of vinegar, acetic acid. Coppersulfate is an ionic compound. You may recall acetic acid reacts with water to produce ions

asked by ALISHA on January 9, 2007
69. ## trig

please help me with some questions I skipped on a review for our test coming up? solve 5-7 on the interval 0 greater than or equal to x less than or equal to 2pi. 5. sin x=sqrt3/2 6. cos x=-1/2 7. tan x=0 ---------------- 14. what is the exact value of

asked by BreAnne on February 22, 2012
70. ## Math

7. The ratio of an object's weight on Earth to its weight on Neptune is 5 : 7. How much would a person who weighs 150 pounds on Earth weigh on Neptune? A. 170 pounds B. 107 1/7 pounds C. 750 pounds D. 210 pounds I answered D, because I took 150 pounds and

asked by Cassie on November 1, 2013
71. ## chemistry

50.0 mL of a solution of HCl is combined with 100.0 mL of 1.15 M NaOH in a calorimeter. The reaction mixture is initially at 22.4°C and the final temperature after reaction is 31.2°C. What is the molarity of the HCl solution? You may assume that there is

asked by Marcus on February 28, 2015
72. ## Gen Chem 1

A tanker truck carrying 2.01×10^3kg of concentrated sulfuric acid solution tips over and spills its load. The sulfuic acid is 95.0% H2SO4 by mass and has a density of 1.84g/L. Sodium Carbonate (Na2CO3)is used to neutralize the the sulfuric acid spill. How

asked by Rachel on October 6, 2010
73. ## PHYSÝC

One end of a metal rod is in contact with a thermal reservoir at 745 K, and the other end is in contact with a thermal reservoir at 105 K. The rod and reservoirs make up a closed system. If 7030 J are conducted from one end of the rod to the other

asked by SUZAN on August 16, 2014
74. ## physics

One end of a metal rod is in contact with a thermal reservoir at 731 K, and the other end is in contact with a thermal reservoir at 107 K. The rod and reservoirs make up a closed system. If 6450 J are conducted from one end of the rod to the other

asked by maria on January 4, 2012
75. ## physics

Air is being compressed in a cylinder with a volume of 0.025 m^3 under a constant pressure of 3.0*10^5 Pa and the volume of the air in the cylinder is reduced to 0.020 m^3. a. By how much is the volume of the air reduced? b. How much work is done in the

asked by anonymous on February 19, 2007
76. ## Chemistry

How would the titration curve of hydrochloric acid solution differ if barium hydroxide was used to titrate instead of sodium hydroxide? How would the titration curve of hydrochloric acid solution with sodium hydroxide differ from the titration curve of

asked by Niki on March 6, 2012
77. ## Chemistry

Given that the structures of cocaine (on the right side of the equation) and its free base ( on the left side) with an H+ : a. Would you expect K for the cocaine to be greater or less than 1.0? Explain. b. Would K for the free base be higher or lower than

asked by Amber on April 13, 2014
78. ## chemistry

Concentrated hydrochloric acid is a 38% solution of hcl in water and has a density of 1.18g/ml. How many milliliters of concentrated hydrochloric acid are needed to prepare 500ml of a 1:200 hcl solution? My calculation 500ml x 1:200 =2.5 1:200 means

asked by Fai on August 9, 2012
79. ## CHEMISTRY

Given that the structures of cocaine (on the right side of the equation) and its free base ( on the left side) with an H+ : a. Would you expect K for the cocaine to be greater or less than 1.0? Explain. b. Would K for the free base be higher or lower than

asked by Amber on April 13, 2014
80. ## Calculus - Rate of Change

Can someone explain how to solve this problem? Sand is being dumped on a conveyor belt onto a pile in such a way that the pile forms in the shape of a cone whose radius is always equal to its height. Assuming that the sand is being dumped at a rate of 10

asked by Fred on July 29, 2015
81. ## physics

A) Assume the mass of a pendulum is 3kg. Calculate the work done by the pendulum on the mass from 0 degrees to 180 degrees ( you will need to integrate with respects to d(theta ) instead of dx given: the mass at the end of the string experiences a

asked by Spice on December 8, 2015
82. ## Calculus

The City Electric System(CES) recently constructed a major transmission line along parts of South Street in the city. The transmission lines are strung between power poles and the hanging lines form a catenary curve. For this Problem we will use the

asked by Jay on March 7, 2016
83. ## religion

i have to Submit a 700-1000 word paper. The paper should be formatted following APA guidelines, and answer these questions: 1. Considering that Hinduism lacks a uniting belief system, what makes up the Hindu religion? 2. What are the cultural and societal

asked by mike on June 3, 2007
84. ## Air pollution analysis

What are the effect of the following on demand for gas/oil/highways/airpollution? 1. a 900 annual tax on vehicle that gets less than 20 mil/gallon 2. 2000 annual income tax credit for owners of hybrids 3. income tax surcharge that lowers disposabl income

asked by Han on November 4, 2006
85. ## chemistry

Four solution are prepared and mixed together: Start with 100.0ml of 0.100M BaCl2. Add 50.0ml of 0.100M AgNO3. Add 50.0ml of 0.100M H2So4. Add 250.0ml of 0.100M NH4. Write an equation for any reaction that occurs after each step and calculate the

asked by Sean on May 2, 2012
86. ## chemistry

I used 10mL of unknown NaCl-NaBr mixture titrate with 0.10M silver nitrate solution. 10.15mL of silver nitrate solution is used. the conc. of NaCl-NaBr mixture is 8g/dm3 I need to calculate the % composition of the NaCl-NaBr mixture.

asked by albee on April 29, 2010
87. ## Chemistry

How come the charges of H*2O*2 (asterisk means subscript), which is hydrogen peroxide,don't equal? The charge of hydrogen is 2, and the charge of O is 4. For an ionic compound you can figure out the formula by the charges(when the charges of the ions add

asked by Emily on April 17, 2010
88. ## Urgent =Math

Tell whether this survey describes a good sample and if so, name the method of sampling used. A phone company randomly calls 6 names from the phone book to find whether the person is satisfied with the phone service. yes, random yes, systematic***** yes,

asked by Monica on May 6, 2016
89. ## math

Beer cans are right circular cylinders. My Mathematical Mead, my Polynomial Pilsner, and my Square-Root Stout cans from the Schmidt Brewery, have dimensional units called "brewskies". Using the zero product rule, they have a volume (in cubic brewskies)

asked by Jeremie on December 10, 2012
90. ## physics

A copper container of mass 100g contains 500g of water. A steel paddle of mass 85g stirs the water. A pulley system operates the paddle. A) the mass (15kg) drops 2,4m, turning the steel paddle. Assume heat lost to surrounding is negligible. 1. Find the

asked by Haiano on July 20, 2014
91. ## Statistics

Upon examining its records, a hospital computes the distribution of the number of days a patient stays at the hospital. They find that 50% of patients stayed just one day before leaving. 30% stayed two days, and 10% stayed 3 days. a.) A patient is selected

asked by Mandy on November 2, 2011

Ka for benzoic acid, C6H5COOH, 6.5x10^-5. Calculate the pH of solution after addition of 10.0, 20.0, 30.0, and 40.0 mL of 0.10 M NaOH to 40.0 mL of 0.10 M Benzoic acid. PLEASE CHECK MY ANSWER!!!!! My answer is: Moles acid = 0.040 L x 0.10 M = 0.0040 Moles

asked by Andy on October 20, 2010
93. ## SUPER URGENT-- CHEMISTRY

1. .0025 M tartric acid completely reacts with .0030 m of al bicarbonate if .913 l of co2 forms at 298 k with pressure of 1.4 ATM how much base used? 2. 3.1 x 10^23 molec of .0035 m hydriodic acid reacts with 25 g of magnesium bicarbonate how much carbon

asked by Danny on May 21, 2012
94. ## Engineering

The angular velocity of a rigid body rotating about an axis of rotation is w = 5^i + 2^j - 4^k rad. per. sec. Determine the linear velocity of point B on the body with a position vector r = 3^i - ^j + 3^k ft. directed from a point on the axis of rotation.

asked by Aaron on February 12, 2012
95. ## Math

Teresa put tiles marked with the letters of her name into a bag. The back of each tile is blank. The tiles are shown below. T E R E S A Without looking into the bag, Teresa will pick a tile. a. What is the probability that Teresa will pick a tile with the

asked by Frances on May 5, 2011
96. ## Physics

Can you plz give explaination to the solutions steps by steps in brief? Cz i really don't understand how 2 apply the formula when i revise it nw. Thnkz a lot. [g=10 ms^-2] Particles P, of mass 0.3 kg & Q, of mass 0.2 kg are attached to the ends of a light

asked by WarmLing on September 29, 2008
97. ## chemistry

What mass of solute is present in each aqueous solution? 40 mL of 6.0 mol/L, H2SO4, solution Soo I did: C=n/V 40 mL= 0.04 L C= 6.0 mol/L/0.04 L = 150 mol/L MH2SO4= 2.02 g/mol + 32.07 g/mol + 64 g/mol= 98.09 g/mol mass H2SO4= 150 mol x (98.09g/1 mol) =

asked by julie on December 1, 2014
98. ## psychology

A pregnant woman is most likely to decide to use the Lamaze method because she A is interested in eliminating the pain of delivery B would prefer to speed up the delivery process C would rather take a longer time in delivery to reduce trauma to her baby D

asked by tzeni on January 7, 2009