# 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 656
1. ## Chemistry

Oxalic acid is a relatively strong diprotic acid with Ka1 = 5.6 ´ 10-2 and Ka2 = 5.1 ´ 10-5. What is the oxalate ion, C2O42-, concentration in a 0.10 M oxalic acid solution? a. 0.052 b. 0.073 c. 0.10 d. 5.6 ´ 10-2 e. 5.1 ´ 10-5

asked by Fatima on May 26, 2011
2. ## Chemisty

The solubility of sodium floride, NaF, is 4.06 g NaF/100 g H2O at 20ºC. What mass of NaF would you have to dissolve in 1000 g H2O to make a saturated solution?

asked by Yvette on July 8, 2010
3. ## chemistry

A 25.0 mL sample of 1.00 M KBr and a 75.0 mL sample of 0.800 M KBr are mixed. The solution is then heated to evaporate water until the total volume is 50.0 mL. What is the molarity of the KBr in the final soltion?

asked by Anonymous on August 29, 2011
4. ## Chem

in a 0.40 M solution of diprotic acid H2A(Ka=7.4x10^-5, Ka2=5.0x10^-10 at 25 celsius), what is the equilibrium concentration of A^2-? A)0.40m b)0.80M C)5.4x10^-3m d)1.4x10^-5M E)5.0x10^-10M

asked by C on March 19, 2013
5. ## math

The 3rd term of a geometric progression is nine times the first term.if the second term is one-twenty fourth the 5th term.find the 4th term. solution ar^2=9a r=sqr of 9 r=3.pls help me on how to get the first term(a)

asked by james on November 27, 2014
6. ## science

Table salt has a solubility of 36 g of salt in 100 g of water at 40°C. If 15 g of the salt are added to 50 g of water at the same temperature, is the resulting solution saturated or unsaturated? Explain your answer.

asked by David on April 11, 2011
7. ## macro econ

Suppose that under the Bretton Woods system, the dollar is pegged to gold at a rate of $35 per ounce and the pound sterling is pegged to the dollar at a rate of$2 = £1. If the dollar is devalued against gold and the pegged rate is changed to \$40 per

asked by onemanmillitia on August 22, 2008
8. ## Maths- complex numbers

Find tan(3 theta) in terms of tan theta Use the formula tan (a + b) = (tan a + tan b)/[1 - tan a tan b) in two steps. First, let a = b = theta and get a formula for tan (2 theta). tan (2 theta) = 2 tan theta/[(1 - tan theta)^2] Then write down the equation

asked by Jake on February 13, 2007
9. ## math

Compute delta(y) and dy for the given values of x and dx=delta(x) y=x^2 , x=8 , delta(x)=0.5 Delta(y)= ??? dy = ??? I got dy=8 by doing: dy= (f prime of x)dx dy=2xdx dy=2xdelta(x) dy=2*8*0.5 dy=8 but I have not clue how to find delta(y) please help! deltay

asked by Julia on April 14, 2007
10. ## Physics - Optics

A photographic slide is to the left of a lens. The lens projects an image of the slide onto a wall which is a distance of 5.94 m to the right of the slide. The image is larger than the size of the slide by a factor of 82.0. How far is the slide from the

asked by Tifani on July 17, 2007
11. ## calculus

Find the linearization of the function below at x = π/3.? y=sin(x)/x Your answer should be a linear function of x where the coefficients are accurate to at least two decimal places. You can enter π in your answer as "pi" (without the quotes). I am not

asked by john on October 14, 2010
12. ## calculus

Find the linearization of the function below at x = π/3.? y=sin(x)/x Your answer should be a linear function of x where the coefficients are accurate to at least two decimal places. You can enter π in your answer as "pi" (without the quotes). I am not

asked by Vick on October 14, 2010
13. ## Physics

In the configuration shown (10m incline for m1 and 8m vertical length for m2 with a spring under it, both masses are linked by a rope and a pulley at the top), the 52.0 N/m spring is unstretched, and the system is released from rest. The mass of the block

asked by Alphonse on October 25, 2012
14. ## Physics

In the configuration shown (10m incline for m1 and 8m vertical length for m2 with a spring under it, both masses are linked by a rope and a pulley at the top), the 52.0 N/m spring is unstretched, and the system is released from rest. The mass of the block

asked by Alphonse on October 25, 2012
15. ## english

Thank you for using the Jiskha Homework Help Forum. Doing this research, I learned that white chocolate is not really chocolate! But, I prefer it anyway, even though dark chocolate is best for the immune system. i need a good lead for a paragraph about

asked by SraJMcGin on May 22, 2007
16. ## In Need of a Mathmetician!!!!

An ant of negligible dimensions start at the origin (0,0) of the standard 2-dimensional rectangular coordinate system. The ant walks one unit right, then one-half unit up, then one-quarter unit left, then one-eighth unit down, etc. In each move, it always

asked by Anonymous on December 3, 2007
17. ## 8th grande transition algebra

well, i am doing a math crossword puzzle on linear equations. I really need some help. here are the questions: what is Ax+By+C called? what are numbers used to graph a point? what is not a straight line? where does a line pass threoug the x-axes? what is

asked by ktm on November 18, 2009
18. ## Algebra, word problem

A small firm produces both AM and AM/FM car radios. The AM radios take 15 h to produce, and the AM/FM radios take 20 h. The number of production hours is limited to 300 h per week. The plant’s capacity is limited to a total of 18 radios per week, and

asked by Marinda on September 14, 2007
19. ## Algebra

I know what the answer is just not how to exopress it. Can someone help me please? State the domain of the function: f(x)(2+x)/(3-x) Now I know the domain is (-infinity,3) U (3, infinity)? (-infinity,3] U [3, infinity) ? How do I express it? do I use ]

asked by Cassie on July 27, 2009
20. ## Algebra

I know what the answer is just not how to exopress it. Can someone help me please? State the domain of the function: f(x)(2+x)/(3-x) Now I know the domain is (-infinity,3) U (3, infinity)? (-infinity,3] U [3, infinity) ? How do I express it? do I use ]

asked by Cassie on July 27, 2009

Hi.. i'm a little confused on using proprtion equations to solve percent problem. can you check the following? Is there a different way to solve? equation: is(part)/of(whatnumber)= %/100 1. What is 94% of 43? x/43 = 94/100 100x = 43*94 (cross multiply)

asked by Alex on October 8, 2013
22. ## science

Why are models useful? a) models work exactly like the things they present b) Models are the first stage in any experiment c) models are better than charts or graphs d) models are the first step in creating a prototype

23. ## MATH

WHAT IS THE LENGTH OF THE YARN TO THE NEAREST INCH A. 1 INCH B. INCH 2 C.INCH 3 D.INCH 4 THAT ALL THE ANSWER THAT'S ON MY WORK PLZ HELP ME THXS GUYS GIRL'S AND BOY'S

asked by REAWEN on March 14, 2017
24. ## Physics

In a control system, an accelerometer consists of a 5.15-g object sliding on a calibrated horizontal rail. A low-mass spring attaches the object to a flange at one end of the rail. Grease on the rail makes static friction negligible, but rapidly damps out

asked by Abdalla A. on May 7, 2013
25. ## chemistry

Given one of the starting materials and end product for each of the following reactions, show all reactants, reaction conditions in brackets (where known) and products. sorry i know this question has been posted already, but i need help. could you explain

asked by John on May 2, 2008
26. ## English

Ever since Lisa auditioned for the musical Annie in the third grade, she had been seriously interested in musical theater. She loves to sing, dance, and act. She performs in two or three shows in her city each year. This year, Lisa was excited to audition

asked by Anonymous on November 20, 2013
27. ## American History

Read the statement. The controversy during Jackson’s presidency over the Second Bank of the United States was largely a dispute over __________. Which phrase most accurately completes the statement? 1 1 1) the impact of the spoils system on the

asked by Klauus on June 22, 2019
28. ## Keyboarding and word processing

If you're compling a list of sources you used for your report in MLA style, the list is called a A. references list B. bigliography C. work-cited list. D. source list. I think the answer is "C"

asked by Sandia on December 9, 2012
29. ## Language arts

In which sentence is "diverts" used correctly? 1)it diverts us to heat bad news 2)be counted the diverts in the story 3)changing the topic, she diverts me. 4)sports are a diverts from school work.

asked by Flying pickles on January 15, 2016
30. ## chemistry

When magnesium metal and an aqueous solution of hydrochloric acid combine, they produce an aqueous solution of magnesium chloride and hydrogen gas. Using the equation, Mg (s) + 2HCl (aq) Imported Asset MgCl2 (aq) + H2 (g), if 72.9 g of Mg and 146.0 g of

asked by Anonymous on July 11, 2016
31. ## chemistry

When magnesium metal and an aqueous solution of hydrochloric acid combine, they produce an aqueous solution of magnesium chloride and hydrogen gas. Using the equation, Mg (s) + 2HCl (aq) Imported Asset MgCl2 (aq) + H2 (g), if 72.9 g of Mg and 146.0 g of

asked by Anonymous on July 11, 2016
32. ## physics

The water supply of a building is fed through a main entrance pipe 6cm in diameter. A 2cm diameter faucet tap positioned 2m above the main pipe fills a 25 liter container in 30s. (a) What is the speed at which the water leaves the faucet? (b) What is the

asked by Anonymous on December 19, 2007
33. ## h bonding

which exhibits hydrogen bonding (there can be more than 1) 1. IF7 2. SiH4 3. CH3CH2OH 4. (CH3)2CHOH 5. PCl3 6. CH3CHCHCH3 * do you have any tips for figuring it out? H bonding, by definition, takes place with H of one molecule and a highly electronegative

asked by christine on February 1, 2007
34. ## Physics

I riding in a car at constant velocity and see an open manhole. I take out an watermelon and hold it out window. My speed is 10m/s and the initial height of watermelon is 1 m. I need to do a calculation to be able to know how far ahead of manhole I have to

asked by Julia on October 3, 2010
35. ## Biology

A mutation has occurred in one chromosome of a spermatogonium. This mutation will show up in how many of the gametes produced from this cell? Choices: A. None B. Two C. All Four D. Cannot be determined I believe it is 2....If the mutation occurs in the

asked by Val on May 9, 2010
36. ## AP Biology

I'm working on a lab to show that light reactions must occur prior to dark reactions in photosynthesis. so far, i thought of the experiment involving two plants, one exposed to sunlight, the other is kept in a box. both receive the same amount of water

asked by Carly on January 4, 2008
37. ## English

Can you please check these sentences? Thank you. 1)What factors can have an influence (play a role?) on the way we dress? 2)Are you fashion conscious? Have you ever been to a fashion show? 3)Do you belong to any fashion conscious (?) teenage group? What

asked by Franco on December 12, 2010
38. ## distance problem

A car travels 20 km/h faster than a truck. The car covers 360 km in 3 hours less time than the truck.Find the speed of the truck. (kindly write the solution, thanks alot)

asked by HELP HELP MNHS on December 17, 2012
39. ## Chemistry

What is the silver ion concentration in a solution prepared by mixing 487 mL of 0.384 M silver nitrate with 379 mL of 0.583 M sodium phosphate? The Ksp of silver phosphate is 2.8 × 10-18

asked by Gabby on January 19, 2013
40. ## Chemistry

Calculate the mass ( kg ) of the solute C4H8O and the volume ( mL ) of the solvent C6H6 that should be combined to generate 6450 g of a solution that is 2.07 m C4H8O. Density (kg/l) C4H8O 0.8892 C6H6 0.8786

asked by Anon on February 1, 2010
41. ## chemistry

Three solutions are mixed together to form a single solution. One contains 0.2 mol \rm mol Pb(CH 3 COO) 2 \rm Pb(CH_3COO)_2, the second contains 0.1 mol \rm mol Na 2 S \rm Na_2S, and the third contains 0.1 mol \rm mol CaCl 2 \rm CaCl_2. Write the

asked by cc on October 19, 2013
42. ## Chemistry

What is the silver ion concentration in a solution prepared by mixing 345 mL of 0.352 M silver nitrate with 443 mL of 0.511 M sodium carbonate? The Ksp of silver carbonate is 8.1 × 10-12

asked by CP on March 11, 2013
43. ## Chemistry

A solution is made by mixing 500 ml of 0.172 M NaOh with exactly 500 ml of 0.100 M CH3COOH. Calculate the equilibrium concentration of the species below. Ka of CH3COOH is 1.8 x10^-5 [H+]=? {OH-]=? [CH3COOH]=? [Na+]=? [CH3COO-]=?

asked by Angela on April 9, 2014
44. ## Math

Help please... some diff equation prbolems... 1.) Transform 2xdy - y(x+1)dx + 6y^3dx = 0 into a Bernoulli Equation. 2.) The equation of the tangent line of the one-family of curve x^2 + y^2 = 25 at P(4, 3) is_______ 3.) The complete solution of 2x^3 dy = y

asked by Therese on December 14, 2009
45. ## chemistry

commercially available concentrated hydrochloric acid is 37.0% w/w HCl. Its density is 1.18 g/mL. Using this information calculate (a) the molarity of concentrated HCl, and (b) the mass and volume (in mL) of solution containing 0.315 moles of HCl.

asked by Anonymous on April 18, 2016

What is the silver ion concentration in a solution prepared by mixing 433 mL of 0.356 M silver nitrate with 467 mL of 0.574 M sodium phosphate? The Ksp of silver phosphate is 2.8 × 10^-18

asked by amanda1012 on September 8, 2012
47. ## AP Chemistry

Sulfuric acid (H2SO4) is a very strong diprotic acid. If 0.036 moles of sulfuric acid is mixed with water to make 576 mililiter of solution, what is the molarity of H+?

asked by J. A on September 30, 2012
48. ## chemistry

Aluminum reacts with sulfuric acid, which is the acid in automobile batteries. If 20.0 grams of Al is placed into a solution containing 115 grams of H2SO4, how many grams of hydrogen gas could be produced? Please help--I do not know how to set this one up.

asked by lucy on October 20, 2007
49. ## chemistry

a buffer composed of 0.50mol acetic acid and 0.50mol sodium acetate is diluted to a volume of 1.0L. The pH of the buffer is 4.74. How many moles of NaOH must be added to the buffer solution to increase its pH to 5.74?

asked by millie on October 7, 2009
50. ## chemistry

Robin the Research scientist prepares 100 mLs of a solution of 100 mM of Tris HCl. What is the pH? and part two for this question Calculate the pH when the scientist adds 100 ul of 50% NaOH

asked by Aarya Singh on January 31, 2017
51. ## Chemistry

assuming the vinegar solution has a density of 1.01 g/mL, calculate the percent by weight of actic acid (CH3CO2H) in your sample of vinegar. How does the value compare with 5% the value for the % acetic acid in normal vinegar? Thanks!

asked by Wandy on March 7, 2012
52. ## Chemistry

True or false question The pH of 0.1mol/L acetic acid is 1. So the amswer is False, the pH is greater than 1. How is pH-log(0.1)=1 wrong? I researched and found this solution but I don't know why I cant use pH=-log ([H+]) Ka=1.8×10^-5 1.8=x^2÷x I get

asked by Anonymous on January 16, 2018
53. ## Economics

11. Often, the _______ the risk, the _______ the rewards. A. higher; higher C. higher; lower B. lower; higher D. faster; quicker 12. When the government of Indonesia imposes a tax on imported electronics products to help its young electronics industry

asked by Heather on January 23, 2012
54. ## physics

A basketball of mass 0.602 kg is passed to a player of mass 83.0 kg who jumps off the floor while catching the ball. The player's center of mass is instantaneously at rest just before he catches the ball, which is initially moving at a velocity of 11.5

asked by Anthony on November 29, 2012
55. ## physics

Two cars approach an ice-covered intersection. One car, of mass 1.22 103 kg, is initially traveling north at 10.6 m/s. The other car, of mass 1.69 103 kg, is initially traveling east at 10.6 m/s. The cars reach the intersection at the same instant,

asked by Anthony on November 29, 2012
56. ## physics

A 75.00-g sample of an unknown metal is heated to 52.00°C. It is then placed in a coffee cup calorimeter filled with water. The calorimeter and the water inside have a combined mass of 225.0 g and an overall specific heat of 2.045 J/(gi°C). The initial

57. ## Language Arts, plz check, again. Sorry!

[SCROOGE touches PRESENT’s robe. The lights fade out on the Cratchits, who sit, frozen, at the table. SCROOGE and PRESENT in a spotlight now. Thunder, lightning, smoke. They are gone.] What purpose is served by these stage directions? They explain

asked by Canary on April 18, 2016
58. ## chem

Section: Ionization expressions, Weak Bases Using the equilibrium constants listed in your book, arrange the following .1 M aqueous solutions in order of increasing pH. a)NaNO2 b)HCl c)NaF d)Zn(H2O)3(OH)(NO3) Here's what I have so far: a) NaNO2 --> Na+ +

asked by Chris on April 28, 2007
59. ## Chemistry

Br2(l)+Cl2(g) (double arrow) 2BrCl(g) dH=+29.4 kJ/mol I am having trouble understanding this. Will the system shift left, right, or unchanged and why? a.Increasing Temp. b. Increasing pressure in flask by adding Ar. c. Increasing volume of flask d. Adding

60. ## Pre-Calculus

2 towers of a suspension bridge are 1000 meters apart and are 160 meters high. The cable between 2 towers hangs in a shape of parabola, which at its lowest is 40meters above the road. A. Find the equation of the parabola, if we put a coordinate system so

asked by Casper on July 14, 2019
61. ## science

You know that a collision must be "elastic" if: The momentum of the two-object system doesn't change The sum of the final kinetic energies equals the sum of the initial kinetic energies There is no change in the internal energies of the objects (thermal

asked by sara on July 24, 2014

Br2(l)+Cl2(g) (double arrow) 2BrCl(g) dH=+29.4 kJ/mol I am having trouble understanding this. Will the system shift left, right, or unchanged and why? a.Increasing Temp. b. Increasing pressure in flask by adding Ar. c. Increasing volume of flask d. Adding

asked by Chemistry on February 12, 2014
63. ## Grammar and Composition

I have to write a speech and record it on a tape. Pet Peeve Speec You will create a "Pet Peeve" Speech. A "Pet Peeve" is one of those little every day occurrences that bugs you, upsets you, or frustrates you. You will use the extemporaneous delivery for

asked by y912f on November 8, 2009
64. ## Chemistry

What volume of 5.0 M H2SO4 should be diluted to 100mL to prepare a 0.25 M H2SO4 M solution? I know the molar mass of H2SO4 is 98g but I'm not sure where exactly that fits in and how I'm supposed to get it to be diluted. Thank you!

asked by Mandy on October 8, 2014
65. ## math

100=1.5((1.1^(n) - 1))/1.1-1 Could you be so nice please and help me find the solution. The answer is 22 but I have whole time different number. I use log on both sides : 100=1.5((1.1^(n) - 1))/1.1-1 10 = 1.5(1.1^(n) - 1) 10 = 1.65^n - 0.5) log 10.5 = n

asked by Lucas on February 23, 2014
66. ## Chemistry 122

A solution is prepared to be 0.10 M acetic acid, HC2H3O2, and 0.20 M sodium acetate, NaC2H3O2. What is the pH of this buffer? Ka for acetic acid is 1.7 x 10^-5. What is the pH after 9.5 mL of 0.10 M hydrochloric acid is added?

asked by Marlynda on November 22, 2010
67. ## chemistry

Calculate the number of grams of sulfuric acid in 1 gallon of battery acid if the solution has a density of 1.25g/mL and is 38.3{\rm \\%} sulfuric acid by mass.

asked by Anonymous on January 21, 2015
68. ## Chemistry

Compound A is added into a calorimeter that contains 0.750 litres of water. If the dissolution of 5.0 g of this compound causes the temperature of the water to rise to 45.0 °C, what is the enthalpy of solution of compound A?

asked by Marlee on October 9, 2012
69. ## Algebra

Hi I need help with this problem full solution only please: Two angles of a triangle have the same measure and the third one is 9 degrees greater than the measure of each of the other two. Find the measure of the LARGEST angle in the triangle.

asked by Seymour on January 27, 2016
70. ## math

100=1.5(1.1^n - 1)/1.1-1 Could you be so nice please and help me find the solution. The answer is 22 but I have whole time different number. I use log on both sides : 100=1.5(1.1^n - 1)/1.1-1 10 = 1.5(1.1^n - 1) 10 = 1.65^n - 0.5) log 10.5 = n log 1.65 n =

asked by Lucas on February 23, 2014
71. ## chemistry class

What is the pH of an aqueous solution at 25.0 °C that contains 3.98 × 10-9 M hydroxide ion? i posted this before and i tried solving it but i get it wrong 14 = ph + - log (3.98 × 10-9) 14- 8.4 = ph 5.6 = ph but the correct answer is 8.400 what did i do

asked by jessie on November 22, 2010
72. ## Chemistry

Compound A is added into a calorimeter that contains 0.750 litres of water. If the dissolution of 5.0 g of this compound causes the temperature of the water to rise to 45.0 °C, what is the enthalpy of solution of compound A?

asked by Marlee on October 9, 2012
73. ## chemistry

A lab tech had accidentally set out 16M HCl for this experiment. How much ( in mL) 16M HCl is needed to make 450mL of a 3M HCl solution?

asked by Christina on October 7, 2013
74. ## chemistry

Concentrated HCI is 12M. What is the molarity of an HCI solution prepared by dilluting 10ml concentrated HCI to a total volume of 250ml?

asked by twynna on February 20, 2011
75. ## math

what are situation and solution equations? example question is: People in a marching band stand in 8 equal rows. There are 56 people in the band. How many people are in each row?

asked by bridget on October 13, 2010
76. ## Chemistry

A chemist reacted 0.05 moles of solid sodium with water to form 50 cm3 of sodium hydroxide solution what mass of sodium was reacted?

asked by Anonymous on March 19, 2016
77. ## chemistry

the concentration of urea in a solution prepared by dissolving 16g of urea in 39 g of H2O is ________% by mass. The molar mass of urea is 60.0 g/mol

asked by jen on May 27, 2013
78. ## Science

a flask contain 25 ml of HNO3 solution which requires 30 ml of 0.2 M KOH to complete the reaction. calculate the concentration of KOH. HNO3+ KOH= H2O + KNO3

asked by BUMMMMMMMy on April 12, 2015

Suppose you had 5 gallons of sodium hydroxide solution which had a concentration of two pounds of soduium hydroxide per gallon. What is the total amount of sodium hydroxide?

asked by Kisha on November 14, 2010
80. ## Precalculus(URGENT)

write the parabola in y squared=4ax or x squared =4ax form where x equals the distance between the foci and the centerpoint y= -(x+3)squared +4 i have no idea how to do this can you tell me how you got the solution

asked by Arielt -Help now fast due tommorow on April 19, 2010
81. ## Chemistry

Balance the redox equation. It occurs in acid solution. Sn(s) + H+(aq) = Sn2+(aq) + H2(g) I understand that first the equation needs to be put into halves. Sn(s) = Sn2+(aq) and H+(aq) = H2(g) Then, Sn(s) = Sn2+(aq) + 2e- and ? From here I am lost. Please

asked by Sha on April 30, 2014
82. ## cHEMISTY

If Ksp for the dissolution of silver carbonate is 8.1x10-12, calculate the concentration of silver ions present in a saturated solution of silver carbonate

asked by john on March 30, 2013
83. ## Chem5

A dioxin-contaminated water source contains 0.052% dioxin by mass. How much dioxin (in g) is present in 4.2 liters of this water? (Assume the solution density is 1.00 g/mL.)

asked by Ryan on May 2, 2011
84. ## Math--1 question

Write an equation for the problem below. Is the given value a solution? A farmer sees 56 of his cows out of the barn. He knows that he has 83 cows all together. Let c represent the number of cows still in the barn. Could c = 33? (1 point) 56 + 83 = c; no

asked by Anonymous on October 1, 2014
85. ## Science

IF 8.5g of KOH powder are placed in 100g of water at room temperature of 20degree Celsius, what is the final temperature of the solution. KOH K+OH H=-57.61 KJ/MOL KOH

asked by Meena on October 7, 2017
86. ## Chemistry 104

A 0.30M solution of a weak monoprotic acid is 0.41% ionized. what is the acid-ionization constant, Ka for this acid? Use. HA + H2O H3O + A to figure out X for H3O and A

asked by Viv on March 12, 2013
87. ## CHEMISTRY

Concentrated HCI is 12M. What is the molarity of an HCI solution prepared by diluting 10ml concentrated HCI to a total volume of 250ml?

88. ## chemistry

suppose you had 5 gallons of sodium hydroxide solution with a concentration of two pounds of sodium hydroxide per gallon.what is the total amount of sodium hydrolyte?

asked by Ana on June 23, 2010
89. ## physics

a 50 kg student who is late runs up two flights of stairs whose combined vertical height is 7.0 m in 10 s (and he then silently enters the classroom while the professor is writing on the chalkboard).Calculate the student's power output in doing work

asked by nicole on February 5, 2013
90. ## psychology

If a psychologist is having counseling sessions with workers, helping evaluate potential job candidates, and improving work environments, then that psychologist most likely works at __________. a mental health center a school an academic institution a

asked by Bri on August 9, 2018
91. ## english

find adverb in "This is one of the most democratic way to buy art. Online galleries can exhibit the work of hundred of artists specializing in many different genres including figurative, abstract, landscape , still life, sculpture and so on. This gives you

asked by kara on May 30, 2011
92. ## math

3x-6 2x-30 = 2x+12 ______ - _______ _______ x-3 3x-9 x-3 sx= (24) I have the anwser but I just cant figure out how to do it. I hava a huge exam in October yet this is not evan a quarter of what I have to learn. Im teaching myself I really suck at this if

asked by Michèle on August 21, 2006

Avoid camouflaged words 1. it was my duty to make a determination of any damages. 2. Harold made a recommendation that we fire Mr. Schultz. 3. we will ask him to bring about a change in his work routine. 4. this new equipment will result in a savings in

asked by efi on October 18, 2011

I am doing research on MySpace and need help on Quantatitive and Qualitative Data, how do i present it as a piece of my position analysis of MySpace I also have to include work examples of models/concepts/frameworks help......long time since i was at

asked by Cindy on November 26, 2009
95. ## History

I was doing notes on the Battle on Long Island as make up work because I was absent when my class was doing it, and I couldn't seem to find out the answer to the question "What did one British soldier say the Patriots did not have?" Its pretty hard because

asked by Someone Who Doesn't Like Stomach Bugs on October 4, 2018
96. ## History

Can you please explain to me what these two things mean? I don't even have an idea. Thank you War generally induces patriotic citizens to work harder for less compensation. War also sometimes clears away outdated infrastructure and allows economy-wide

asked by Samantha on April 10, 2009
97. ## chemistry

300 milimole of perfect gas occupies 13 lit at 320 k ,calculate the work done in joule ,when the gasexpands A)isothermally against a constant pressure of .20 atm Isothermal and reversible process c)Into vaccum until volume of gas is increased by 3 ltr

asked by Dhruvi on December 8, 2016
98. ## Physics

If a ball is sliding along a frictionless horizontal surface is the total work being done on the ball zero? I think so because there is no mention of applied force. Am I correct? P.S. On this holiday weekend, I want to send a BIG THANK YOU to all the

asked by KC on April 11, 2009
99. ## Physics

I'm having trouble setting up/solving this physics problem? Can someone please help me? Thank you. A 4700 kg lunar lander is in orbit 45 km above the surface of the moon. It needs to move out to a 340-km-high orbit in order to link up with the mother ship

asked by Walter on April 4, 2014
100. ## English

These sentences are part of the same work. Thank you. 1)George Orwell along with Ernest Hemingway were among the more famous foreigners participating in the efforts against the fascists. 2. Many Spanish intellectuals and artists either were (either) killed

asked by Franco on January 24, 2011