Marissa

Most popular questions and responses by Marissa
  1. Home economics

    List 10 careers in home economics

    asked on September 25, 2016
  2. Chemistry

    Consider the reaction 2H2O(g) → 2H2(g) + O2(g) ΔH = +483.60 kJ/mol at a certain temperature. If the increase in volume is 42.7 L against an external pressure of 1.00 atm, calculate ΔU for this reaction. (The conversion factor is 1 L · atm = 101.3 J.)

    asked on October 3, 2018
  3. College Chemistry

    Balance this equations for redox reactions in basic solution. Fe(OH)3(s) + OCl- ¨ FeO42- + Cl-

    asked on September 23, 2010
  4. Physics - Electric Field

    Find the electric field at a point midway between 2 charges of +40.0e-9 C and +60.0E-9 C separated by a distance of 30.0 cm. My work: q1=40E-9 q2=60e-9

    asked on March 23, 2015
  5. Chemistry

    three different liquids are used in a manometer. (a) derive an expression for P1-P2 in terms of ro(a), ro(b), ro(c), h1, and h2 (b) suppose fluid A is methanol, B is water, and C is a manometer fluid with a specific gravity of 1.37; pressure P2=121.0 kPa;

    asked on November 7, 2010
  6. fibers and fabrics

    Which one of the following is the most complete and accurate definition of fiber? A. A stringy substance from plants B. The hair of an animal C. Man-made threads and yarns D. Basic raw material from which fabric is made 2. An example of a natural fiber is

    asked on December 2, 2009
  7. science

    if you wanted to consult the geologic time scale for when the first vertebrates evolved, where would you look?

    asked on April 17, 2014
  8. Algebra

    Can someone please explain how to do these problems. 1)write a polynomial function of least degree with intregal coefficients whose zeros include 4 and 2i. 2)list all of the possible rational zeros of f(x)= 3x^3-2x^2+7x+6. 3)Find all of the rational zeros

    asked on August 10, 2007
  9. Chemistry

    At 20 degrees celcius the vapor pressure of toluene is 22 mmhg and that of benzene is 75 mmhg. Assume an ideal solution, equimolar in benzene and toluene. At 20 degrees celcius what is the mole fraction of benzene in the vapor in equilibrium with this

    asked on April 7, 2015
  10. Chemistry, acids and bases

    (a) Find pH and pOH of 1.0 M solution of sodium benzoate, NaC6H5COO. (Ka of benzoic acid is 6.2x10^-5) (b) Calculate pH after 0.205 moles per liter of HCl was added (assume volume does not change (c) Calculate pH after 1.0 moles per liter of HCl was added

    asked on May 6, 2008
  11. Physics

    while on the moon, the Apollo astronauts enjoyed the effect of a gravity much smaller than that on earth. if Neil Armstrong jumped up on the moon with an initial speed of 1.51 m/s to a height of 0.700m, what amount of gravitational acceleration did he

    asked on February 3, 2011
  12. Chemistry

    Based on the balanced equation, C2H4 + 3O2 → 2CO2 + 2H2O calculate the molecules of H2O formed when 135 molecules of O2 are reacted.

    asked on November 7, 2010
  13. Calculus

    Find a formula for a function of the form y=bxe−ax with local maximum at (0.5,0.3679). y=

    asked on October 11, 2018
  14. Physics

    The lower frequency limit for human hearing is usually considered to be 20.0 Hz. (a) What is the speed of sound in m/s if the air temperature is 20.0ºC? (b) What is the corresponding wavelength for this frequency?

    asked on October 8, 2013
  15. Math

    What number is 1,000,000 greater than 337,676

    asked on August 26, 2014
  16. Physics

    A man at point A directs his rowboat due north toward point B, straight across a river of width 100 m. The river current is due east. The man starts across, rowing steadily at 2.50 m/s and reaches the other side of the river at point C, 150 m downstream

    asked on February 2, 2014
  17. ap biology

    What barriers might hinder the acquisition of plasmids?

    asked on April 8, 2014
  18. Physics

    A baseball player slides into third base with an initial speed of 3.8m/s. If the coefficient of kinetic friction between the player and the ground is 0.40, how far does the player slide before coming to rest?

    asked on February 11, 2015
  19. Calculus

    A rectangular tank with a square​ base, an open​ top, and a volume of 4,000 ft cubed is to be constructed of sheet steel. Find the dimensions of the tank that has the minimum surface area. I'm not understanding how to get started and find the

    asked on December 5, 2016
  20. Chemistry

    Your space ship has docked at a space station above Mars. The temperature inside the space station is 24oC at a pressure of 745mmHg. A balloon with a volume of 425mL drifts into the airlock where the temperature is -95oC and the pressure is 0.115 atm. What

    asked on November 14, 2013
  21. CHEMISTRY HELP PLEASE!!

    0.350L of 0.160 M NH3 is added 0.140 L of 0.100 M MgCl2 . How many grams of (NH4)2SO4 should be present to prevent precipitation of Mg(OH)2 (aq) ? The Ksp of Mg(OH)2 is 1.8 x 10–11.

    asked on March 2, 2013
  22. physics

    Two charges are separated by a distance d = 5 m. The charge q1 has a charge of q1= 7.0 µC (microcoulombs) and q2 has a charge of q2= 6.8 µC. What is the force between the charges?

    asked on May 1, 2011
  23. Chem

    Which one of the compond are covalent HF RbF LiF NaF

    asked on September 21, 2016
  24. physics

    A wire tooth brace used by orthodontists. The top-most tooth is protruding slightly, and the tension in the wire exerts two forces at 16 º angle on this tooth in order to bring it back into alignment. If the forces have the same magnitude of 19.5 N, what

    asked on September 14, 2012
  25. Physics- Exercise 10

    A 500kg pig is standing at the top of a muddy hill on a rainy day. the hill is 100.0m long with a vertical drop of 30.0m. the pig slips and begins to slidedown the hill. What is the pig's speed at the bottom of the hill? Use the Law of conservation of

    asked on February 3, 2011
  26. nutrition

    Review the nutrition quality of the items, using what you know about daily values, and ingredients (one of the products must have a health claim). Write a 300-500 word essay on what you have learned.

    asked on October 20, 2011
  27. geometry

    One endpoint and the midpoint of a segment are given. Find the coordinates of the other endpoint. Show all your work. A. Endpoint: (-1,9) Midpoint: (-9,-10) Endpoint: _______ B. Endpoint: (9,-10) Midpoint: (4,8) Endpoint: ________

    asked on September 11, 2014
  28. physics

    A man cleaning his apartment pushes a vacuum cleaner with a force of magnitude 55.8 N. The force makes an angle of 15.3 ◦ with the horizontal floor. The vacuum cleaner is pushed 3.55 m to the right along the floor. Calculate the work done by the 55.8 N

    asked on July 24, 2015
  29. 11th grade

    a rock is dropped from a 20.0m bridge falls into the river below. a.)at whqat velocity does it strike the water? b.)how much time did the rock take to reach the water?

    asked on December 12, 2010
  30. algebra

    1)Write the expression 9n^6+7n^3-6 in quadratic form,if possible A.9(n^3)^3+7n^3-6 B.9(n^2)^3+7(n^2)-6 C.9(n^3)^2+7(n^3)-6 D.not possible I'm thinking C on this one but im not sure 2)solve b^4+2b^2-24=0 A.-2,-square root of 6,square root of 6,2 B.-square

    asked on August 18, 2007
  31. Chemistry

    When coal is burned, the sulfur it contains is converted into sulfur dioxide. This is SO2 is a serious pollutant, so it needs to be removed before it escapes from the stack of a coal fired plant. One way to remove the SO2 is to add limestone, which

    asked on November 15, 2016
  32. physics

    a football punter accelerates from rest to a speed of 8 m/s during the time in which his toe is in contact with the ball (about 0.21 s). If the football has a mass of 0.50 kg, what average force does the punter exert on the ball?

    asked on November 20, 2011
  33. Spanish 8th grade

    I have to read this and answer these questions for homeowrk-I'm not sure if I did this correctly. Could you please check-I put the reading and then questions and my answers under it-thank uyou for checking-I'm really not sure about my answers-I'm a little

    asked on October 12, 2011
  34. algebra(check)

    I'm pretty sure these are right but I just want to check. 1)Find the 20th term of the arithmetic sequence in which a1=3 and d=7 a.143 b.136 c.140 d.133 answer=b 2)Write an equation for the nth term of the arithmetic sequence -3,3,9,15... a.an=n+6 b.an=6n+9

    asked on August 24, 2007
  35. History

    The growing popularity of newspapers, magazines, and books in the United States during the 19th century contributed to which of these? The emergence of a uniquely American literary style The expansion of educational opportunities for women and minorities

    asked on April 3, 2017
  36. Organic Chemistry

    How would you expect the following series of compounds to compare in behavior for SN1 vs SN2? CH3CH=CHCH2Br CH3CH2CH2Br CH3C(-Br)=CHCH3 on the last one, Br is a substituent of the C and that C is double bonded to CHCH3 Please help! Even if someone could

    asked on November 26, 2008
  37. Physics

    OK, so I'm having some serious problems with this one question. It's on relativity. Here it is: Calculate the mass of a proton (m0 = 1.67E-27 kg) whose kinetic energy is one sixth its total energy. How fast is it traveling? THANKS!!

    asked on April 19, 2009
  38. Chemistry

    Potassium permanganate, KMnO4, a common oxidizing agent, is made from various ores that contain manganese (IV) oxide, MnO2. The equation shows the net reaction for one process that forms potassium permanganate 2MnO2+2KOH+O2=2KMnO4+H2 What is the maximum

    asked on November 15, 2016
  39. english

    Which type of faulty logic appears in this sentence? Dr. Bishop has never performed a surgery before, so he must not be equipped to be a good surgeon.

    asked on April 25, 2016
  40. Trigonometry

    A scientist has 37 grams of a radioactive substance that decays exponentially. Assuming k=-0.3,how many grams of radioactive substance remain after 9 days.

    asked on April 13, 2018
  41. math

    1)The area A of a triangle varies jointly as the lengths of its base b and height h. If A is 75 when b=15 and h=10,find A when b=8 and h=6 2)Determine the equation of any vertical asymtotes of the graph of f(x)=2x+3/x^2+2x-3 1) Area of a triangle is 1/2

    asked on August 21, 2007
  42. math

    A support wire runs from the top of a tower to the ground. If the tower is 1200 feet tall and the wire is attached to the ground 500 feet away from the tower, how long is the support wire?

    asked on November 20, 2013
  43. dressmaking

    Mrs. Shotto was once one of your regular customers, but she hasn't asked to have any garments made in approximately one year. You note she has lost weight. She would like you to make her a special silk blouse to replace a favorite blouse that has worn out.

    asked on December 2, 2009
  44. Calculus

    How do you use imlicit differentiation to differentiate e^(xy)? I have the problem "use implicit differentiation to find dy/dx. e^(xy)+ x^2 - y^2 = 10. I've gotten to the point whereI have d/dx(e^(xy)) + 2x - 2ydy/dx = 0, but I can't go any further because

    asked on May 22, 2012
  45. algebra

    I'm pretty sure these are right but I just want to check. 1)Find the 20th term of the arithmetic sequence in which a1=3 and d=7 a.143 b.136 c.140 d.133 answer=b 2)Write an equation for the nth term of the arithmetic sequence -3,3,9,15... a.an=n+6 b.an=6n+9

    asked on August 26, 2007
  46. Health

    Gonorrhea is spread through contact with the ________. A. Anus, !@#$%^&, Mouth, Skin B. !@#$%^&, Anus, Mouth, !@#$%^& C. !@#$%^&, Skin, !@#$%^&, Anus D. Mouth, !@#$%^&, !@#$%^&, Fingers I think it's B?

    asked on October 27, 2012
  47. Physics

    Microwaves with λ = 1 mm are incident upon a 10 cm slit. At a distance of 1 m from the slit, what is the width of the slit's image? The answer is supposed to be 10 cm. I can't seem to get that though. Can someone explain?

    asked on November 5, 2009
  48. algebra(check)

    1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 a.15 b.15/2 c.-15 d.1/15 answer=a 2)Find the sum of the infinite geometric series n=1 at the bottom of the sigma notation 20(-1/4)n-1 on the right side a.25 b.80/3 c.16 d.does not exist answer=c

    asked on August 24, 2007
  49. algebra

    1)Find the sixth term of the geometric sequence for which a1=5 and r=3 a.1215 b.3645 c.9375 d.23 answer=a 2)Write an equation for the nth term of the geometric sequence -12,4,-4/3,... a.an=-12(1/3)n-1 b.an=12(-1/3)n-1 c.an=-12(-1/3)-n+1 d.an=-12(-1/3)n-1

    asked on August 23, 2007
  50. Math

    Write each rate as a fraction in lowest terms 15 feet in 30 seconds

    asked on August 27, 2019
  51. Chemistry

    Write a conversion factor that could be used to convert between moles of methane and moles of hydrogen

    asked on November 17, 2016
  52. Math

    A bicycle trail is 7miles and 880 yards long.How many total yards is the bicycle trail

    asked on April 9, 2013
  53. Math

    The sales tax rate for the state of Washington was 8.3%. What is the state sales tax on a $4,300 car in Washington? What is the final cost of the car, including tax?

    asked on August 27, 2019
  54. English

    How would you paraphrase this excerpt from "A Tale-Tell Heart" by Edgar Allen Poe; "I bade them search - search well. I led, at length, to his chamber. I showed them his treasures, secure, undisturbed"

    asked on January 12, 2014
  55. algebra

    Find 2 consecutive integers, the smaller a perfect cube and larger a perfect square.

    asked on November 7, 2013
  56. biology

    A dominant gene A produces wire-haired texture in dogs. Its recessive aamllele a produced smooth hair. Cross the heterozygous wire-haired dog with homozygous smooth-haired dog. List the genotype and phenotype ratios of all the possible offspring.

    asked on January 21, 2012
  57. algebra(reiny)

    Hey thanks for all your help but you kinda confused me on a few: 1)Determine whether f(x)=-5x^2-10x+6 has a maximum or minimum value and find that value A.minimum -1 B.maximum 11 C.maximum -1 D.minimum 11 and you said the function opens up, so there is a

    asked on August 16, 2007
  58. physics

    Two canoeists start paddling at the same time and head toward a small island in a lake. Canoeist 1 paddles with a speed of 1.40m/s at an angle of 45 degrees north of east. Canoeist 2 starts on the opposite shore of the lake, a distance of 1.5 km due east

    asked on September 24, 2014
  59. algebra

    1)Use Pascal's triangle to expand (w-x)^5 2)Use the binomial theorem to find the third term in the expression of (n-2p)^6 3)Which is NOT a counterexample to the formula 1^2+3^2+5^2+...+(2n-1)^2=n(2n+1)/3 A.n=3 B.n=2 C.n=1 D.n=4 is it C thanks:)

    asked on August 23, 2007
  60. chemistry

    An equilibrium is dynamic. true or false

    asked on December 17, 2014
  61. spelling

    what is the answer to this analogy? must start with the letters scr, spr, str, or thr. couldn't:wouldn't ; green ????also for fifteen: five: nine ???

    asked on February 1, 2010
  62. spelling

    analogies for couldn't wouldn't as green is to ?

    asked on February 1, 2010
  63. Algebra

    Write the equation of the prpendicular bisector of the line segment AB with endpoints A(1,1) and B(7,5). Write the answer in slope-intercept form.

    asked on November 18, 2010
  64. algebra

    how many quarts of pineapple juice should Theo add to a 20% pineapple drink to create 5 quarts of a 50% pineapple juice mixture?

    asked on October 20, 2009
  65. algebra

    1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 a.15 b.15/2 c.-15 d.1/15 answer=a 2)Find the sum of the infinite geometric series n=1 at the bottom of the sigma notation 20(-1/4)n-1 on the right side a.25 b.80/3 c.16 d.does not exist answer=c

    asked on August 23, 2007
  66. Chemistry

    Potassium permanganate, KMnO4, a common oxidizing agent, is made from various ores that contain manganese (IV) oxide, MnO2. The equation shows the net reaction for one process that forms potassium permanganate 2MnO2+2KOH+O2=2KMnO4+H2 Explain why the oxygen

    asked on November 15, 2016
  67. physics

    While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 225 m east, 160 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.

    asked on October 24, 2011
  68. Science

    I'm in 6th grade and I need help for my science project. I don't even know what to do. Any fun science projects for 6th graders?

    asked on May 21, 2011
  69. Physical chemistry

    100g of water at 30.0C is mixed with 150g of water at 85.0C. What is the final temperature of th mixture assuming no heat is gained or lost during the mixing process?

    asked on October 10, 2010
  70. algebra

    I'm pretty sure these are right but I just want to check. 1)Find the 20th term of the arithmetic sequence in which a1=3 and d=7 a.143 b.136 c.140 d.133 answer=b 2)Write an equation for the nth term of the arithmetic sequence -3,3,9,15... a.an=n+6 b.an=6n+9

    asked on August 24, 2007
  71. Chemistry

    What is the maximum mass of cobalt (II) phosphate that will precipitate from a solution prepared by adding an excess of K3PO4 solution to 100.0 mL of 5.0 M CoCI2? Sorry for all the confusion with different names we are working in a group and its easier to

    asked on November 16, 2016
  72. Chemistry

    A precipitation reaction takes place when a water solution of potassium phosphate, K3PO4, is added to a water solution of cobalt (II) chloride, CoCl2 Write a balanced equation for this reaction

    asked on November 15, 2016
  73. Accounting

    During the week ended May 15, 2013, Scott Fairchild worked 40 hours. His regular hourly rate is $31. Assume that his earnings are subject to social security tax at a rate of 6.20 percent and Medicare tax at a rate of 1.45 percent. He also has deductions of

    asked on April 15, 2014
  74. psychics

    The lower frequency limit for human hearing is usually considered to be 20.0 Hz. (a) What is the speed of sound in m/s if the air temperature is 20.0ºC? (b) What is the corresponding wavelength for this frequency?

    asked on October 8, 2013
  75. algebra

    1)What is the 4x^2=y^2+8y+32 answer= either hyperbola or parabola 2)The graph of which equation is a circle? answer= 5x^2+10x+5y=9 3)Solve the system of equations by graphing x^2+y^2=16 and y= -x+4 answer= (4,0),(0,-4) 4)Find the exact solutions of each

    asked on August 20, 2007
  76. Chemistry

    What is the ionization energy (in kJ/mole) of the hydrogen-like ion F8+ ?

    asked on December 5, 2010
  77. Math differentiation

    1. y = x^x 2. y = (sin^2xtan^4x)/(x^2+1)^2 3. y = x^(1/x) 4. y = 2^(-x^3) Okay, so I'm pretty sure 1 is done easily: ln y = ln (x^x) ln y = x ln x d/dx ln y = d/dx x ln x y'(1/y) = x(1/x) + ln x(1) = 1 + ln x y'(1/y) = ln x + 1 y' y(1/y) = (ln x + 1)y y' =

    asked on August 27, 2008
  78. algebra

    1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 a.15 b.15/2 c.-15 d.1/15 answer=a 2)Find the sum of the infinite geometric series n=1 at the bottom of the sigma notation 20(-1/4)n-1 on the right side a.25 b.80/3 c.16 d.does not exist answer=c

    asked on August 26, 2007
  79. algebra

    I'm pretty sure these are right but I just want to check. 1)Find the 20th term of the arithmetic sequence in which a1=3 and d=7 a.143 b.136 c.140 d.133 answer=b 2)Write an equation for the nth term of the arithmetic sequence -3,3,9,15... a.an=n+6 b.an=6n+9

    asked on August 23, 2007
  80. physics

    At the moment car A is starting from rest and accelerating at 5.0 m/s2, car B passes it moving at a constant speed of 45m/s. How long will it take car A to catch up with car B?

    asked on January 17, 2013
  81. Physics

    Two arrows are shot vertically upward. The second arrow is shot after the first one, but while the first is still on its way up. The initial speeds are such that both arrows reach their maximum heights at the same instant, although these heights are

    asked on August 31, 2012
  82. algebra

    1)Find a1 in a geometric series for which Sn=300,r=-3,and n=4 a.15 b.15/2 c.-15 d.1/15 answer=a 2)Find the sum of the infinite geometric series n=1 at the bottom of the sigma notation 20(-1/4)n-1 on the right side a.25 b.80/3 c.16 d.does not exist answer=c

    asked on August 24, 2007
  83. Algebra

    State the possible number of imaginary zeros of g(x)= x^4+3x^3+7x^2-6x-13 this is how far Ive gotten:there are 4 zeros,3 positive and 1 negative If you've found four real zeroes, then there are no imaginary zeroes. You can also see that there are no

    asked on August 10, 2007
  84. algebra

    1)Solve by factoring:5x^2=4-19x answer=-4,1/5 2)Which quadratic equation has roots 7 and -2/3? answer=A A.2x^2-11x-21=0 B.3x^2-19x-14=0 C.3x^2+23x+14=0 D.2x^2+11x-21=0 3)To solve 4x^2-28x+49=25 by using the square root property,you would first rewrite the

    asked on August 14, 2007
  85. Math 222

    I am having difficulties trying to do rational expressions. I have to use the words Domain, Excluded Value, Set, Factor, and Real Numbers to show how I got the answer. Can someone please help me solve this one? g^2-6g-55 ___________ g

    asked on February 19, 2015
  86. math

    Rohnda is in charge of buying food for the school picnic, she found that hot dogs are in packages of 24, buns in packages of 18, ketchup in boxes of 12, and mustard in boxes of 15. what is the least number of students that can be feed if each student

    asked on May 13, 2013
  87. Calculus

    A rectangle is inscribed with its base on the x axis and its upper corners on the parabola y= 12 - x^2. What are the dimensions of such a rectangle with the greatest possible area?

    asked on June 1, 2011
  88. math

    Find a polynomial f(x) with leading coefficient 1 and having the given degree and zeros. Each polynomial should be expanded from factored form, simplified and written in descending order of exponents on the variable. For example: (x+5)(x-2) should be given

    asked on April 12, 2011
  89. Math

    estimate a 15% tip on a $42.65 check

    asked on November 20, 2010
  90. college

    Pretend the program in Senegal had been reducing infant mortality at a rate of 11 % per year. How long would it take for infant mortality to be reduced by 39 %?

    asked on September 21, 2010
  91. algebra

    1)Find the 20th term of the arithmetic sequence in which a1=3 and d=7 a.143 b.136 c.140 d.133 an=a1+(n-1)d a20=3+(20-1)7 a20=3+(19)7 a20=3+133 answer=b 2)Write an equation for the nth term of the arithmetic sequence -3,3,9,15... a.an=n+6 b.an=6n+9

    asked on August 26, 2007
  92. algebra(check)

    1)Find the sixth term of the geometric sequence for which a1=5 and r=3 a.1215 b.3645 c.9375 d.23 answer=a 2)Write an equation for the nth term of the geometric sequence -12,4,-4/3,... a.an=-12(1/3)n-1 b.an=12(-1/3)n-1 c.an=-12(-1/3)-n+1 d.an=-12(-1/3)n-1

    asked on August 24, 2007
  93. physics

    a bag of sugar weighs 5.00 lb on earth. What would it weigh in newton on the moon, where the free fall is one-sixth that of the earth?

    asked on November 20, 2011
  94. algebra

    1)What is the distance between the museum and sailing club.I cant post the graph or anything but I have my numbers right its 53 but I used the distance formula so its either 53 units or the square root of 53 units. 2)Write the equation of the parabola y=

    asked on August 20, 2007
  95. algebra

    1)A.f(x)= x^2+4 B.f(x)= x^2-4x^2+4x-16 C.f(x)= x^2+4x^2+4x+16 D.f(x)= x^2-4x^2-4x+16 2)A.+-1,+-2,+-3,+-6 B.0,+-1,+-2,+-3,+-6,+-1/3,+-2/3 C.+-1,+-2,+-3,+-6,+-1/3,+-2/3 D.+-1,+-3,+-1/6,+-1/3,+-1/2,+-3/2 4)I don't know what they mean either but this is all it

    asked on August 17, 2007
  96. math

    write an equation for the parabola with focus (1,3) and vetex (0,3) See the paragraph Analytic Geometry Equations. You will have a choice of equations, you did not state whether the axis of symettry was parallel to x or y axis.

    asked on August 12, 2007
  97. Chemistry

    Calculate molarity of KNO3 solution if 69 g of salt are dissolved into 250 mL of solution

    asked on March 17, 2016
  98. Chem

    What is the order of rate = k[NO]2[Br2]. 2nd order?

    asked on April 23, 2015
  99. Physics

    A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 3.9 s later. If the speed of sound is 340 m/s, how high is the cliff? i know you use the equation y=(initial velocity)(time) + (1/2)(acceleration)(time^2) but I'm having

    asked on July 2, 2012
  100. Chemistry, reactions w/ water

    Write the equation for the reaction of each of the following with water. a) HCl b) CH3COOH c) NaOH d) NH3 Are these correct? a. HCl (aq) + H2O (l) --> H3O+ (aq) + Cl- (aq) b. CH3COOH (aq) + H2O (l) --> CH3COO- (aq) + H3O+ (aq) c. NaOH (aq) + H2O (l) -->

    asked on May 6, 2008

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