# 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 128
1. ## P Chem

A 10.0% by mass H2SO4(aq) solution has a density of 1.07 g/mL. (a) How many milliliters of solution contain 8.41 g of H2SO4? (b) What is the molality of H2SO4 in solution? (c) What mass (in grams) of H2SO4 is in 258 mL of solution?

asked by Jenny Marie on May 24, 2010

How many grams of carbohydrate does a person of mass 75 kg need to metabolize to climb five flights of stairs (15 m height increase)? Each gram of carbohydrate provides 17.6 kJ of energy. Assume 10.0% efficiency—that is, 10.0% of the available chemical

asked by Nasir on June 11, 2012

OKay My question is: Two factories manufacture 3 different grades per paper. the company that owns the factories has contracts to supply at least 16 tons of low grade, 5 tons of medium grade, and at least 20 tons of high grade paper. It cost $1000 per day asked by Deanna on October 16, 2009 4. ## Physics 1. An airplane is flying with the velocity of 459km/h [E40S], however its ground velocity is 498km/h [E24S]. Determine the velocity of the blowing wind. (Use the vector subtraction diagram and geometry to solve this question). I drew a diagram and tried asked by Tayyabah on September 16, 2014 5. ## bookkeeping to complete tasks quickly and efficiently a operating system has many special components that are known as? (a)routines (b)scripts (c)system files (d)processes my answer is c to start a program from an icon you should? (a)click the left mouse button asked by susue on April 3, 2012 6. ## math how do you find the square of a number that doesn't really have a square number and u have 2 show ur work without using ur calculator? for ex: what is the square of 5? asked by saranghae12 on September 6, 2011 7. ## physics Suppose that you measured the moment of inertia of the system as I = 5.05 kg-m2. Assume the diameter of the pulley around which you wrap the string is d = 2.5 cm. a) suppose the system is initially spinning at angular speed ωo = 2.05 rad/s. After you drop asked by dan on November 30, 2010 8. ## Organic Chem Im not really sure how to begin with this question.. 1. The synthesis of toluene by the aluminum chloride-catalyzed Friedel-Crafts alkylation of benzene is badly complicated by the formation of di-, tri-, and polymethylated benzenes. A simple solution to asked by Maura on February 11, 2015 9. ## College Algebra How do you solve this to graph the system of inequalities? x+2y is equal to or less than 6 2x+y is equal to or less than 6 x is equal to or greater than 0 y is equal to or greater than 0 asked by LeAnn on November 18, 2009 10. ## math David helps his dad with grocery shopping.he wants to buy brand x or brand y laundry detergent.he knows his dad wants the best value,so he compares the prices.48 ounces of brand x is 5.76.two pounds of brand y is 4.80.which brand is the better value.show asked by santos on April 3, 2011 11. ## AP Chemistry CH3NH2(aq)+H2O(l)=>CH3NH3+(aq)+OH-(aq) Kb=4.4 x 10^-4 Methylamine, CH3NH2, is a weak base that reacts with water according to the equation above. A student obtains a 50.0 mL sample of a methylamine solution and determines the pH of the solution to be asked by Christina on May 2, 2013 12. ## chemistry CH3NH2(aq)+H2O(l)=>CH3NH3+(aq)+OH-(aq) Kb=4.4 x 10^-4 Methylamine, CH3NH2, is a weak base that reacts with water according to the equation above. A student obtains a 50.0 mL sample of a methylamine solution and determines the pH of the solution to be asked by ashdawg on April 4, 2013 13. ## Chemistry A 15.0mL solution of H2SO3 is neutralized by 12.0mL of a standardized 1.00M NaOH solution. What is the concentration of the H2SO3 solution? Please reply with the steps on how to do this question so I can learn. I can't find examples or anything related in asked by bri on June 14, 2012 14. ## Chemistry Suppose 50.0 mL of an aqueous solution containing an unknown monoprotic weak acid is titrated with 0.250 M KOH. The titration requires 31.52 mL of the potassium hydroxide solution to reach the equivalence point. What is the concentration (in molarity) of asked by Chill on March 5, 2012 15. ## chemistry If a precipitation reaction occurs when a solution of one species is added to a solution of the other, enter the formulas and states of all products. Separate by comma. If there is no reaction, enter the formula and state of all ions in solution. magnesium asked by bubble on January 20, 2010 16. ## chemistry If a precipitation reaction occurs when a solution of one species is added to a solution of the other, enter the formulas and states of all products. Separate by comma. If there is no reaction, enter the formula and state of all ions in solution. aluminum asked by Amrita on November 23, 2010 17. ## genetics 5. A female of the genotype a b c / + + + (i.e. heterozygous for three genes on the same chromosome) produces 100 meiotic tetrads (100 cells undergoing meiosis, where recombination can occur). Of these 100 tetrads, 68 show no crossover events. Of the asked by manutdfan on March 6, 2014 18. ## Chemistry The chemical reaction of 100 g of salicylic acid, C7H6O3, with excess acetic anhydride produces 50.0 g of aspirin, C9H8O4, according to the equation. What is the percentage yield for the reaction shown below? Please show your work. C7H6O3 + C4H6O3 → asked by Marian on February 27, 2010 19. ## Math please check answer please check my answer thanks What would be the amount of compound interest on$ 8,000 invested for one year at 6 %, compounded quarterly ? (need to show all of your work ) ok this is what I got $8,000 x 0.6 =$ 480 $480 / 4 =$120 $120 x 0.6 / 4 =$

asked by Maria on May 19, 2008
20. ## Chemistry

The chemical reaction of 100 g of salicylic acid, C7H6O3, with excess acetic anhydride produces 50.0 g of aspirin, C9H8O4, according to the equation. What is the percentage yield for the reaction shown below? Please show your work.

asked by Kayla on March 31, 2014
21. ## algebra

Show a complete solution. Upstream, downstream. Junior’s boat will go 15 miles per hour in still water. If he can go 12 miles downstream in the same amount of time as it takes to go 9 miles upstream, then what is the speed of the current?

asked by Sandra on July 17, 2009
22. ## math

A and B can finsih a work in 16 days and 12 days respectively. A started the work and worked at it for 2 days. He was then joined by B . find the total time taken to finish the work

asked by nitesh on November 26, 2013
23. ## algebra word problem

A small company produces both dollhouses and sets of doll furniture. The dollhouses take 3 hours of labor to produce, and the furniture sets take 8 hours. The labor available is limited to 400 hours per week, and the total production capacity is 100 items

asked by TAMMY on May 1, 2007
24. ## physics

An automotive suspension system consists of a combination of strings and shock absorbers, if you were an automotive engineer, would you design a suspension system that was underdamped, critically damped, or overdamped? Discuss each case.

asked by Baseeruh on February 28, 2016
25. ## introduction to computers

you need to install an operating system on a computer that will be sharing files for the company employees. You estimate there eill be as many as 15 users accessing these files at one time. Which operating system is ideally suited for this machine?

asked by Anonymous on August 18, 2015
26. ## Physical Science

No system is completely closed off from its surroundings. Which represents a system that is almost completely closed? A. a capped soda bottle B. a wood-burning fireplace C. a washing machine D. a pot of boiling water I believe it is A.

asked by dark1 on February 17, 2014
27. ## Biology

1) What memory system is sensation responsible for? Sensory, short term or long term memory system? Explain. 2) How does encoding memories relate to transfer appropriate processing and fluid intelligence?

asked by Jasmine on February 22, 2013
28. ## government-pos110

The political system in which those who have governmental authority get and retain authority directly or indirectly because of winning free elections is called: A.a republic. B.an authoritarian system. C.a direct democracy. D.a representative democracy. D?

asked by Shelly on November 15, 2011
29. ## physics

A system of pulleys is used to lift an elevator carrying a 3,300 newton load. assuming the pulley system is friction free, approximately how far would 10,000 joules of energy lift the elevator?

asked by tania on February 22, 2011
30. ## Psychology/Biology Help!!

1) What memory system is sensation responsible for? Sensory, short term or long term memory system? Explain. 2) How does encoding memories relate to transfer appropriate processing and fluid intelligence?

asked by Jasmine on February 21, 2013
31. ## Physics

How fast would a rocket have to be going in order to completely leave the solar system? (For the second part of this problem, assume that the Sun is the only mass in the solar system and that the rocket is beginning its journey from Earth's orbit?)

asked by Kaitlyn on September 30, 2011
32. ## ENGLISH revised

BACKGROUND: Ten years ago, I started working as a clerk for DMD Medical Supplies. Six months ago, Liz, the human resources director, promoted me to office manager. I manage two employees: Jack and Ruth. My office provides secretarial support for the four

asked by Kayla on March 30, 2012
33. ## Algebra

What system of equations do I use to solve the following question? A boat traveled 336 miles downstream and back. THe trip downstream took 12 hours. THe trio back took 13 hours. What is the speed of the boat in still water What is speed of the current?

asked by Tom on January 31, 2011
34. ## math

could someone please help. given each set of data for ∆ABC: a) solve for b given ∠B=88 degrees,a=31.5m,c=25.6cm b) solve for a given ∠B=66 degrees,∠C=28 degrees,c=11.6cm i) state whether the sine law or cosine law is required to solve the unknown

asked by deborah on March 25, 2010
35. ## Math

Define variable and write a system of equations for this situation. Solve using substitution. A farmer grows only sunflowers and flax on his 240-acre farm. This year he wants to plant 80 more acres of sunflowers than that of flax. How many acres of each

asked by Angie on March 31, 2009
36. ## Gen Chemistry

What is the pH ( 3 significant digits) of a 0.01 M solution of sulfuric acid? Hint is that the first ionization constant is "large", and the second is finite, and the [H+] donated by the second equilibrium depends upon the amount of [H+] already donated by

asked by lyne on March 26, 2008
37. ## Math

Allison measures 1 5/16 teaspoons of salt. She measures another 1 11/16 teaspoons of salt. How many tablespoons does she measure altogether? Please show work

38. ## Math- Geometry

There are 30 pepperonis with a radius of .5in each on a pizza with a radius of 1 ft. What is the percentage of the pizza top that is covered by pepperonis? Please show work!!

asked by Bri on June 1, 2019
39. ## math

Given the linear equation y=-3/2x+1, find the y-coordinates of the points (-4), (-2), and (6). Please show all of your work. Plot those points and graph the linear equation.

asked by Allie on December 16, 2010
40. ## algebra

Given the linear equation y = 4x + 2, find the y-coordinates of the points (-2, ), (1, ), and (-3, ). Please show all of your work. Plot these points and graph the linear equation.

asked by Sharday on November 1, 2011
41. ## college algebra

form a polynomial f (x) with real coefficients having the given degree and zeros. degree 5; zeros 5; -i; -6+-i f(x)= a(?) Please show step by step work.

Find the unit rate. Show all work for full credit. $36 for 4 quarts of honey. Can this have a unit rate, what is it, and how do I find it? asked by Lily Malinowski on October 17, 2018 43. ## college algebra use the remainder theorem to find the remainder when f(x) is divided by x+2. then use the factor theorem to determine whether x+2 is a factor of f(x). f(x)=4x^6+36x^3+32 please show work asked by ladybug on November 19, 2012 44. ## geometry line AB is parallel to line CD, the measurement of angle A=2x-25, and the measurement of angle C=x+5. find the value of x. show work and explain your reasoning. asked by joseph on October 29, 2011 45. ## math Jim paid$ 5.55 for 1 notepad and 7 pencils. Anne paid $12.28 for 3 notepads and 2 pencils. How much does each notepad cost? Show all work. Thanks asked by Billy on April 7, 2014 46. ## geometry Given p is false, q is true,and r is false, find the truth value of the statement. (~P ~Q) ____> ~r Show step by step work. asked by angela on June 1, 2012 47. ## Algebra Given the linear equation y=-4/3x+1,find the y-coordinates of the points (-6),(-3) and (6).Show work.Plot these points and graph linear equation. asked by sherry on March 17, 2012 48. ## Math A proton has a size of 0.000000000123 and an electron has a size of 1.4x10^-8. How many times smaller is an electron than a proton? Show your work. asked by Monica on October 17, 2013 49. ## Algebra Given the linear equation y=-4/3x+1,find the y-coordinates of the points (-6),(-3) and (6).Show work.Plot these points and graph linear equation. asked by sherry on March 17, 2012 50. ## math Given the linear equation , find the y-coordinates of the points (-6, ), (-3, ), and (3, ). Please show all of your work. Plot those points and graph the linear equation. asked by mary on July 17, 2011 51. ## algebra a recipe requires flour and sugar in a 3:1 ratio. if the flour required is 2 3/4 cup, how much sugar is required? show work please. asked by jaimecarlon on April 5, 2015 52. ## math math Given the linear equation y=2/3x+1, find the y-coordinates of the points (-6, ), (-3, ), and (3, ). Please show all of your work. Plot those points and graph the linear equation asked by mary on July 17, 2011 53. ## math math Given the linear equation , find the y-coordinates of the points (-6, ), (-3, ), and (3, ). Please show all of your work. Plot those points and graph the linear equation. asked by mary on July 17, 2011 54. ## algebra Given the linear equation y=-3/5x-4, find the y-coordinates of the points (-5, ), (0, ), and (5, ). Please show all of your work. Plot those points and graph the linear equation. asked by sharday on November 1, 2011 55. ## math there are 15 boys and 18 girls in fifth grade. Find the ratio of boys to girls in fifth grade.(how do I get the answer) can someone show me how to work the problem asked by dan on October 1, 2012 56. ## algebra Please show work* . i don't get how to do this at all only 1/3 of the university students wanted to become teachers . if 2600 didn't want to become teachers, how many university students are there? asked by sam on January 21, 2016 57. ## Math Jim paid$ 5.55 for 1 notepad and 7 pencils. Anne paid \$ 12.28 for 3 notepads and 2 pencils. How much does each notepad cost? Show all work

asked by Bill on April 7, 2014
58. ## Math

what is the solution to the system of equations? 5x + 4y = 8 x - 2y = 10 (not multiple choice) my answer: (-5, -1) What are the missing values? (coincident) 4x + 5y = 8 8x + ____ y = _____ (Not multiple choice) Im not sure how to do this one collection of

asked by Anonymous on November 19, 2014
59. ## chem

Consider the reaction that occurs on mixing 50.0 mL of 0.560 MNaHCO3 and 50.0 mL of 0.400 M NaOH at25oC. (a) Write a balanced net ionic equation for thereaction. (b) What is the pH of the resulting solution? (c) How much heat (in joules) is liberated by

asked by pal on March 29, 2011
60. ## Chem 1

The forensic technician at a crime scene has just prepared a luminol stock solution by adding 15.0g of luminol into a total volume of 75.0 \rm mL of \rm H_2O. What is the molarity of the stock solution of luminol? 1.13M Before investigating the scene, the

asked by Chris on March 13, 2013
61. ## algebra

A manufacturer of shipping boxes has a box shaped like a cube. The side length is (5a + 4b). What is the volume of the box in terms of a and b? Show your work. (5a+4b)3 =(5a+4b)(5a+4b)(5a+4b) =(25a2+40ab+16b2)(5a+4b) = 125a3 + 100a2b + 200a2b + 160ab2 +

asked by Alexa on February 16, 2016
62. ## math11

Solve the non linear equation x^2=3x+4 graphically using a calculator, Write the equations of the graphs you used to find the solution. I got this question wrong what would be my Y1= and Y2= equations. Not sure what I'm doing wrong but whenever I have an

asked by Juliet on October 19, 2010
63. ## math11

Solve the non linear equation x^2=3x+4 graphically using a calculator, Write the equations of the graphs you used to find the solution. I got this question wrong what would be my Y1= and Y2= equations. Not sure what I'm doing wrong but whenever I have an

asked by Juliet on October 19, 2010
64. ## Inequality test

Posted by Jason Roberj1 on Thursday, December 8, 2016 at 11:30am. 1. Which number is a solution of the inequality G > 6.4 A 7 B 6 C 6.4 D -7 2. Which number is a solution of the inequality y+2>8 A -5 B -6 C 6 D 7 3. which number is A solution of the

asked by Jason Roberj1 on December 8, 2016
65. ## Chemistry-Common ions

c=Calculate the OH- conc in a solution containing 6.2x10(-3)M Ba(OH)2 and 1.00x10(-2)M BaCl2? I thought of using the BaCl2 conc to find the conc of Ba initially, then use that in the ice table for Ba(OH)2, and solve for OH. But i dnot think that's right.

asked by matt on November 13, 2011
66. ## Physics

Hydroelectricity is generated by storing water behind a dam, and then letting some of it run through generators in the dam to turn them. If the system is the water, what is the environment that is doing work on it? If a dam has water 100m deep behind it,

asked by Anonymous on July 20, 2018
67. ## MATH

The ratio of the perimeter of triangle KLM to the perimeter of triangle PQR is 5/3 and LM is 4 less than twice QR. Find LM and QR, if Triangle KLM~Triangle PQR. Can someone solve this in ratio and proportion method? Thanks.

asked by Kevin Loed on November 10, 2010
68. ## Chemistry

50mL of 0.1M HCl is mixed with 50mL of 0.1NaOH. delta T = 3^oC. Calculate the enthalpy of neutralization per mole of HCl. assume the specific heat capcity of the solution is 4.18J/g/C and density=1.0g/mL. I tried it but got the wrong answer. What I did was

asked by Vic on August 10, 2007
69. ## Chemistry

A sample of impure Limestone weighing 0.3440 g was treated with 50 mL of HCl 0.1363 mol/l. after elimination of all CO2 by boiling, excess acid was created by 4.45 mL of NaOH 0.1445 mol/L1. Calculate the% (w/w) of CaO and CaCO3 in the sample

asked by Kelly on May 21, 2016
70. ## Chemistry

If 125mL of a 1.10 NaCl solution is mixed with 105mL of a 0.850M CaCl2 solution but NO reaction takes place, calculate the final concentration of each of the ions in the final solution. Please reply with the steps on how to do this question so I can learn.

asked by bri on June 14, 2012
71. ## Chemistry

A solution of a weak acid will consist of the acid and its conjugate base. True or False false Yes, of course: Take acetic acid acetic acid + H2OH3O+ + acetateion- The system is in equilibrium. true

asked by KHNJ on February 14, 2007
72. ## Algebra

The Kinetic energy (k)of a moving object varies jointly with it mass (m) and the square of its velocity (v).If an object has a mass of 22.5 kilograms and moving with a velocity of 20 meters per second has a kinetic energy of 4500 joules, find it kinetic

asked by rosa on May 21, 2010
73. ## physics

A spring and mass system are oscillating with an amplitude of 5.4 cm. The spring constant is 166 N/m and the mass is 540 g. Find the mechanical energy of the system

asked by diana on November 8, 2015
74. ## Science

Can someone describe the G protein receptor system and the tyrosine-kinase receptor system. I wanna know how these two systems are similar and how these two systems are different in their of structures and functions.

asked by Elain on March 15, 2016
75. ## health care

Develop a unique proposal that describes a new health care system. Consider the current U.S. health care system’s strengths, weaknesses and challenges.

asked by jonny on June 19, 2010
76. ## physics

a closed system is observed to have 22 objects in it.initially the total energy of the system is 8598J.after 9.3hours have passed,how much total energy will the syatem contain?

asked by taylur on January 26, 2012
77. ## Chemistry

is Fe3O4 + 4H2 = 3Fe + 4H2O spontaneous at 298 K? Delta H system= 149.8 kj/mol Delta S system= 610.0 kj/mol

asked by Riley on March 5, 2013
78. ## physics

A spring and mass system are oscillating with an amplitude of 8.4 cm. The spring constant is 204 N/m and the mass is 540 g. Find the mechanical energy of the system to 2 sf.

asked by jake on June 15, 2014
79. ## Thanks TRISH

thanks...even though you didn't help me with that you still helped me.. You're welcome. Like BobPursley told you, I just can't give you the answer. Not only is it not what this site is for, you would never learn anything, and like he mentions, it is

asked by Margie on February 6, 2007
80. ## Logic / Discrete Mathematics

Show that "¬p Λ q is logically equivalent to p → ¬q" . I'm not sure if the conditional identity is correct, but what I did was I negated the whole second condition and it immediately became equal to the first? Please help and if possible, show steps

asked by Luke on September 1, 2014
81. ## chem

The molecular formula is: Na(s)+ H2O(l)---->NaOH(aq)+H2(g) This is showing a single displacement reaction.I am not sure how to show the complete ionic equation, this is what I have so far: Na+(s)+ H+ H+O2-(l)---->Na+OH-(aq)+H2+(g) Is this how you show it?

asked by Lenny on April 21, 2009

Find all primes less than 100 that can each be written in all three ways: p=a^2+b^2=c^2+2 e^2=f^2+3 g^2, and show how it's done with each one. The numbers you're squaring must be integers; show your thinking. thanksi don't get it at all

asked by Mia on September 24, 2009
83. ## physics

Calculate the net work output of a heat engine following path ABCDA in Figure 14.30, where horizontal axis is V and each unit is 0.5*10^-3 m^3, V1 = 1.0*10^-3 m^3 and V2 = 4.0*10^-3 m^3. The vertical axis is P(N/m^2); A is (1.0*10^-3,2.6*10^6), B is

asked by Justin on July 25, 2013
84. ## physics

Calculate the net work output of a heat engine following path ABCDA in Figure 14.30, where horizontal axis is V and each unit is 0.5*10^-3 m^3, V1 = 1.0*10^-3 m^3 and V2 = 4.0*10^-3 m^3. The vertical axis is P(N/m^2); A is (1.0*10^-3,2.6*10^6), B is

asked by Justin on July 26, 2013
85. ## Calculus

Use implicit differentiation to find the slope of the tangent line to the curve y/(x+7y)=x^5+7 at the point (1,(-8/55). can anyone help me work out the problem step by step? y (x+7y)-1 = x5 +7 dy(x+7y)-1-y((x+7y)-2*(dx +7dy)=5x4 multiply it out, gather the

asked by jimmy on May 19, 2007
86. ## physics

Calculate the net work output of a heat engine following path ABCDA in Figure 14.30, where horizontal axis is V and each unit is 0.5*10^-3 m^3, V1 = 1.0*10^-3 m^3 and V2 = 4.0*10^-3 m^3. The vertical axis is P(N/m^2); A is (1.0*10^-3,2.6*10^6), B is

asked by Justin on July 28, 2013
87. ## physics

Calculate the net work output of a heat engine following path ABCDA in Figure 14.30, where horizontal axis is V and each unit is 0.5*10^-3 m^3, V1 = 1.0*10^-3 m^3 and V2 = 4.0*10^-3 m^3. The vertical axis is P(N/m^2); A is (1.0*10^-3,2.6*10^6), B is

asked by Justin on July 28, 2013
88. ## math

Determine the number of solutions for the following system of equations 2x+5y=7 10y=-4x+14 1)Exactly one solution 2)No solutions 3)infinite solutions 4)Exactly 2 solutions I solved the equations and got y=7-2X/5 y=-4X+14/10 and I said infinite solutions.

asked by B8 on March 2, 2014
89. ## Physics

We discussed in lectures that traveling Electromagnetic waves in vacuum of the form E⃗ =E0xˆcos(kz−ωt),B⃗ =B0yˆcos(kz−ωt) satisfy all 4 Maxwell's equations. In lectures, I showed that an application of the generalized Ampere's Law (closed loop

asked by Anonymous on May 11, 2013
90. ## math

Could someone please show me how to do these problems? or just show me how to do 1 or 2? I would really appreciate any help you could give... There are examples in my lesson but I don't understand them, here are the examples~~ EXAMPLE~ Solve 3(x – 2) + 4

asked by Abby on September 30, 2015
91. ## math

use your calculator.show 14. broken keyr is 1. show 2 ways

asked by daniel on September 21, 2011
92. ## math

Using a calculator. show 14 broken key is 1 show 2 ways

asked by kay on November 5, 2010
93. ## math

Hi would you please show how to know if the function is differentiable or not ? please show me the answer with examples

asked by jack on December 13, 2011
94. ## Pre=Calc

Use composition to show that the given functions are inverses (You must show both compositions). Help? g(x)=x^2+3/2

asked by Kasey on April 26, 2016
95. ## Maths

A polynomial g(x) is given by: g(x) = (x-1)(x+2)(x-a)(x-b) 1) Given that g(0)=4 show that ab=-2 2) given also that g(3)=40 show that a+b=1 3) given that a and b are integers, give possible values for a and b. Thank you

asked by Anonymous on October 14, 2015
96. ## algebra

can any one show me where to get free online help with algebra? i need a tutor or someone to show me what im doing

asked by bobbi on July 17, 2010
97. ## Chemistry

A chemistry student needs to standardize a fresh solution of sodium hydroxide. She carefully weighs out 338.mg of oxalic acid H2C2O4 , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in 250.mL of distilled water. The

asked by Emma on November 7, 2018
98. ## physics

In the figure, a frictionless roller coaster car of mass m = 938 kg tops the first hill with speed v0 = 14.9 m/s at height h = 31.5 m. How much work does the gravitational force do on the car from that point to (a) point A, (b) point B, and (c) point C? If

asked by Hunter on October 8, 2014
99. ## physics

In the figure, a frictionless roller coaster car of mass m = 672 kg tops the first hill with speed v0 = 19.4 m/s at height h = 34.7 m. How much work does the gravitational force do on the car from that point to (a) point A, (b) point B, and (c) point C? If

asked by Anonymous on March 4, 2013
100. ## math

1. A(-3;4) is a point on a circle with centre at the origin. a.determine the coordinates of B, if AB is a diameter. b. Show that point C(0;5) lies on this circle. c.show that ACB has a magnitude of 90degrees. 2.a.ddetermine the equation of the circle with

asked by Anonymous on May 4, 2015