Questions Asked on
September 14, 2010

  1. English

    A: Oh, this is to Germany. How will you send it?+ B: By registered mail. (What is the meaning of 'this is to Germany'? What is the role of 'to' in this sentence?)

    asked by rfvv
  2. C1`

    Use at least five adverbs and five adjectives to write a brief review of a movie, sporting event, musical performance, or television show. Bold each adverb. Underline each adjective. Compare the event to one or more similar events. When comparing, use at

    asked by VEMSW
  3. Pre Calc

    Derive the equation of the locus of all points that are equidistant from the point F(-3,4) and the line y=-2. Leave your answer in general form. [General Form: ax^2+by^2+cx+dy+e=0]

    asked by Asher
  4. Physics

    A hummingbird hovers motionless beside a flower. You can observe that the wings are moving rapidly up and down. If air pushes upward on the bird with a force of .30N whats the weight of the hummingbird?

    asked by Gio
  5. physics

    A long, thin straight wire with linear charge density -λ runs down the center of a thin, hollow metal cylinder of radius R. The cylinder has a net linear charge density 2λ. Assume λ is positive. Find expressions for the electric field at the following

    asked by David D.
  6. geography

    The European Union (EU) was formed to advance the economic goals of Europe. Countries of the EU open their borders to member nations. European citizenship is extended to all, allowing people to live, work, and vote in any member nation. Member nations have

    asked by Victoria
  7. chemistry

    WHAT TYPE OF CHEMICAL REACTION IS FORMED FROM Mg + O2----MgO

    asked by lOUISE
  8. algebra

    Given the function f described by f(x)=12x, find each of the following: f(0) f(-1) f(2)

    asked by Katy
  9. geography

    Match the region to its description. 1. climate _defined by agreements between nations creating free trade zones 2. cultural _defined by average precipitation and temperature 3. economic _defined by factors including language, religion, or customs 4.

    asked by Victoria
  10. Math

    distance problem suzi drove home at 60mph,but her brother jim,who left at the same time, could drive at only 48mph. When suzie arrived, jim still had 60 miles to go. How far did suzi drive?

    asked by Steven
  11. Physics

    PLEASE HELP!! The x and y cooridinates of an object are given by x(t) = 10t + 5t^2 + 3t^3 y(t) = 20t - 10t^2 + 2t^3 where x and y are in meters and t is in seconds. How fast is the object traveling at t = 1 s? Please explain in detail how to do this

    asked by Indira
  12. Physics

    PLEASE HELP!! The x and y cooridinates of an object are given by x(t) = (10 m/s)t + (5 m/s2)t2 + (3 m/s3)t3 y(t) = (20 m/s)t - (10 m/s2)t2 + (2 m/s3)t3 where x and y are in meters and t is in seconds. What is the object's acceleration at t = 1 s? Please

    asked by Indira
  13. finite math

    Assume that the student has a cup with 15 writing implements: 8 pencils, 5 ball point pens, and 2 felt-tip pens.In how many ways can the selection be made if no more than one ball point pen is selected?

    asked by carly
  14. finite math

    Assume that the student has a cup with 15 writing implements: 8 pencils, 5 ball point pens, and 2 felt-tip pens.In how many ways can the selection be made if no more than one ball point pen is selected?

    asked by carly
  15. economics

    1. 1. Derived demand refers to a) demand curves derived from utility functions b) an individual demand curve estimated from a market demand curve c) a market demand curve estimated from individual demand curves d) demand for a resource derived from the

    asked by shubh
  16. Math

    find any stationary points of the function g(x) = (2x-3)square root of 5+16x-4x^2 (0 less than or equal to x less than or equal to 4) and use the first derivative test to classify each stationary point as a local maximum or local minimum of g(x) this is

    asked by Pd
  17. history

    how did the romans built cities and showed us how to organize these?

    asked by claire
  18. training and development(CHURCH)

    hi, may i know what are the training objective of the church?when they train people?how the training is conducted? please i don't know any about church

    asked by chocolate covered jesus
  19. sociology

    does diamond hurt the enviroment and do we choose profit over ou enviroment when it comesto diaond mining.

    asked by tyler
  20. Physics

    at what velocity would a snowball melt before it hit the wall at 32 degrees?

    asked by brian
  21. math word problem

    Bill likes pepperoni pizza, and Howard like sausage pizza. Both are willing to eat pizza with sausage and pepperoni both. They order 10 pizzas total, each of which has either sausage or pepperoni and some of which have both. If 6 have pepperoni on them,

    asked by M.A.
  22. chemistry

    Which is an example of an anion? A. potassium B. ammonium C. sodium D. chloride

    asked by junior
  23. English

    I'm writing my english on theme for a certain novel. What would be a good topic sentence to start my introduction off with?

    asked by Lana
  24. chemistry

    Which state of matter has the strongest bond? A. liquid B. solid C. gas D. molecule i think B but im not 100% sure

    asked by junior
  25. chemistry

    Couze The water in the buket has some energy (tempreture) it is absorbed by the water and the ice melts this way water cools...now if you consider the ice outside the bucket water will no longer be in tuch with ice ,since energy of water since must be

    asked by Rupali
  26. chemistry

    1. State one property in which a solution of sugar in water resembles a mixture of sugar and sand, and one property in which it differs from it?

    asked by Rupali
  27. bc

    20. You are writing to a reader who favors a different solution than the one you recommend. Which of the following is MOST likely to persuade the reader? (Points: 5) Describe your reader's solution first, explain why it won't work, and then go on to

    asked by Anonymous
  28. chemistry

    What is composed of atoms in fixed proportions? A. mixtures B. compounds C. electrons D. elements

    asked by junior
  29. English

    Can you please check if the following sentences are possible? Thank you. 1)He sailed for Africa in a French steamer. At last they came to the mouth of the Congo river. The first company trading post Marlow saw was a depressing place. 2) African people were

    asked by Franco
  30. math

    A magazine claims that 25% of its readers are college students. Of a random sample of 200 readers, 42 are college students. Use a .10 level of significance to test Ho: p =.25 and H1: p ≠ .25 Show the hypothesis test procedure.

    asked by cristi
  31. IT210

    Why do you think the requirements analysis process is so difficult? Describe two things you can do to overcome these difficulties. Post a Hello World pseudocode or coding example in your post.

    asked by Anonymous
  32. math

    SOLVE THE SYSTEM USING SUBSTITUTION MATH X-4Y=49 3Y-4Y=-66

    asked by Anonymous
  33. en forma estandar

    como se escribe 423,090,709,000 en forma estandar

    asked by Alberto
  34. chemistry

    Which of the following has the greatest effect on the properties of an element? A. the number of ions B. the number of protons C. the number of neutrons D. the number of electrons

    asked by junior
  35. math

    SOLVE BY SUBSTITUTION MATH...8X+5Y=-7 X=36-8Y

    asked by Anonymous
  36. Geometry

    m< =2x+6;m

    asked by Carla
  37. chemistry

    Which of these best describes energy? A. the emission of particles from unstable nuclei B. the capacity to do work C. the splitting of a nucleus D. the combining of nuclei

    asked by junior
  38. Math

    Please help... What is the principle of powers? When solving a radical equation how do we use the principle of powers to eliminate radicals

    asked by Jesse
  39. Math

    Please explain why a positive number minus a negative number equals positive and you add it together??? Makes no sense at all. ex 10-(-3)=13

    asked by Cheryl
  40. physics

    newton third law says that action and reaction are equal and opposite but if we throw wet soil on the wall it sticks to wall, it does not returns back, why it happens

    asked by Bilal
  41. chemistry

    what is the freezing point ang boiling point of ah 5.00grams caffune(calcium hydrogen10 nitrogen4 oxygen2)and 250 mole H2O

    asked by juzen
  42. chemistry

    determine the boiling point and freezing point of the following solution 1. 5.00grams caffune (calcium hydogen10 nitrogen4 oxygen2)and 250moles H2O

    asked by juzen
  43. chemistry

    2. 0.300 kilogram chloroform(chlorine calcium3)and 21.0grams eucalyptol(carbon10 hydrogen18 oxygen 3. what is the concentration of a solution of sodium chlorine water containing 1.170grams solute in 100moles solution 4, what is the % by volume of a

    asked by juzen
  44. sociology

    identify two things that were considerd deviant in the past but are not considerd deviant now

    asked by ayesha
  45. chemistry

    2C6H5CL + C2HOCL3 / C14H9CL5 + H2O 114G CHLOROBENZENE IS REACTED WITH 485G CHLORAL. WHAT MASS OF DDT IS FORMED?

    asked by anderson
  46. math

    What number divided by 2, 3, 4, 5, or 6 has a raminder of 1, but when divided by 7 has no remainder?

    asked by Shirley
  47. education

    According to Ch. 12 of the text, there are barriers that prevent the implementation of technology in classrooms. Based on your experiences or observations, what barriers exist that are not mentioned in Ch. 12? Discuss possible solutions to these barriers.

    asked by renata
  48. math

    Each side of a square is lengthened by 8 inches. The area of this new, larger square is 196 square inches. Find the length of a side of the original square.

    asked by Mary
  49. algebra

    Given the function f described by f (x) - 12x, find each of the following: f(-11) f(12) f(29)

    asked by Katy
  50. hist/135

    •Submit a 150- to 200-word response explaining how Reagan’s policies reflected conservative politics and contributed to stimulation of the economy. Be sure to mention specific examples of policy

    asked by renata
  51. hist/135

    o Describe the social, economic, and political composition of the decade of corporate greed and how it affected the political climate of the 1980s. Keep in mind that Reagan's tax policies favored some people over others.

    asked by renata
  52. algebra

    Find the indicated outputs for f(x) =4x^2 -4x f(0) f(-1) f(2)

    asked by Lynn
  53. algebra

    In 1995, the life expectancy of males in a certain country was 70.1 years. In 1999, it was 73.6 years. Let E represent the number of years since 1995. The linear function E(t) that fits the data is E(t) =_____ t +______.(Round to the nearest tenth) Use the

    asked by James
  54. algebra

    r = 100/7

    asked by sam
  55. Healthcare Communication Strategies

    I am trying to write a paper on Communication Theory, which was due last night, I got majority of it done but I am stuck, can you help me to finish it please, I currently work In a Primary Care Clinic on a Naval Base, and in this paper I need include how

    asked by Kerri
  56. French

    toi / la / aimer / la / moi / fête / mieux / et / nous / faire i am supposed to unscramble and conjugate these and make a sentence i cant figure one out that makes sense

    asked by Isabelle
  57. physics

    What is the magnitude of the displacement of a car that travels half a lap along a circle that has a radius of 170m ?

    asked by Taisiya
  58. Algebra 2

    -2sqrt8+2sqrt2-3sqrt18. Im having pn b)ems with radicals. Please he)p me.

    asked by *Demetria*
  59. college - chem

    how do i find the amount of moles of H2O in a hydrate?

    asked by Patti
  60. MAth

    explain how children's concepts of partitioning need to be refined to produce a concept of fractional parts

    asked by Carrie
  61. business hs

    I need a list of 5 basic components of professional behavior. I have only come up with being on time, and respecting your co workers. can someone help me?

    asked by Ty
  62. math

    What time of function is this? 5x^(-3)+4x^(-2)+4 Power function?

    asked by Anonymous
  63. geometry

    what is the measure of the vertex angle of an isosceles triangle if one of its base angles measures 58?

    asked by Anonymous
  64. math

    what do you divide 83 and 100 with to get to 5/6

    asked by liz
  65. I.C.T

    what are the 2 advantages and disadvantages for: "personal computers"

    asked by Anonymous
  66. 12th Grade Maths

    make p the subject in both equtions ap+b=c-dp q - 1/2 p=6-3q

    asked by daz
  67. 12th Grade Maths

    simplify (e is positive) (24e)^1/3 / (3e)^1/3

    asked by daz
  68. 3rd grade

    écrire une expression égale à 2000 en utilisant une seul fois chacun des nombres 1;2;3;4;5

    asked by corinne
  69. english

    does anyone know the definition to the word a."extrinsic" b."arousal"

    asked by Anonymous
  70. algebra

    1/3-4(4/7 + 5)

    asked by shayla
  71. Math

    You and a friend both take a math examination. You score a 98 out of 100 points and your friend scores 96 out of 100 points. Who scored better? Explain

    asked by klk
  72. art/101

    · Write a 200- to 300-word summary that answers the following: o Summarize the reaction of the public to Michelangelo’s David and Marcel Duchamp’s Nude Descending a Staircase. o What did contemporary viewers find objectionable about each work? o What

    asked by stephaine
  73. calc

    Find an equation of the tangent line to the curve at the given point. y = 6 x sin x P= (pi/2 , 3pi) i know the slope of a tangent line is equal to the first derivative. For that I got 6xcosx + 6sinx but idk how to put that into the y-y1=m(x-x1) formula to

    asked by calc
  74. EDU

    What are the positive and negative influences of the media on adolescents?

    asked by Ggift
  75. 7th grade life science

    list 10 importance of lifescince

    asked by Lizzie
  76. chemistry

    Acids and bases react with one another to form compounds called ______? A. salts B. ions C. mixtures D. salts, ions, and mixtures

    asked by junior
  77. statistics

    Suppose you sample randomly, without replacement, a number between 1 and 999999, all outcomes have the same probability of being selected.What is the probability that the digits of the number selected add up to 23

    asked by cebile
  78. math

    in right triangle find length of side not given b=1,c=square root of 26

    asked by ruthann
  79. chemistry

    In an atom, the maximum number of electrons having the quantum numbers n=5 and §¤ = 3 is: 1. 9. 2. 14. 3. 50. 4. 25. 5. 7. Shouldn't the maximum number be a lot bigger than the answer choices?

    asked by dave
  80. alicia

    Okay, write the expression or inequality. : the difference of a number z and 11 is equal to 35 How would I do that? please explain in great detail

    asked by math
  81. Physics

    You are pulling a suitcase through the airport at a constant speed. The handle of the suitcase makes an angle of 45 degrees with respect to the horizontal direction. If you pull with a force of 7.5 N parallel to the handle, what is the force of friction

    asked by Ashli
  82. Math

    I need a good explination to understand why a positive number minus a negative number equals a positive or in other words you add it. ex 10-(-5)= 15

    asked by Cheryl
  83. College Physics

    A 3.0 kg black is at reat on a horizontal floor. If you push horizontally on the 3.0 kg block with a force of 12.0 N, it just starts to move. What is the coefficient of static friction?

    asked by Tam
  84. Math

    The sum of 12 and the quanity 8 times a number k is equal to 48.... How would I write an expresion or inequality for that using >

    asked by Alicia
  85. English

    I need to write a paper on place. I've come up with a few ideas, but am unable to flesh them out. Some ideas are: imagination as a magical place, Israel, Governor's Island, and Around the watercooler. I need to be able to get 3 body paragraphs out of it.

    asked by Writer's Block
  86. Weather & Climate (science)

    Why is it that an Aneriod Barometer Can be used to measure elevation as well as air pressure?

    asked by Dani
  87. English

    Can you please check if the following sentences are grammatically correct? Thank you. 1) He invited him to his room for a drink and he accepted the invitation. 2) He spoke highly of Kurtz because he thought Marlow knew everything about the company. 3) As a

    asked by Franco
  88. molal

    the freezing point of ethanol (C2H5OH) is -114.6C. the molal freezing point depression constant for ethanol is 2.00C/m. what is the freezing point (C) of a solution prepared by dissolving 50.0 g of glycerin (C3H8O3, A nonelectrolyte) in 200 g of ethanol.

    asked by lisa
  89. calsulus

    if h(t) represents the height of an object above ground level at time t and h(t) is given by h(t)=-16t^2+13t+1 find the height of the object at the time when the speed is Zero. h(t)=?

    asked by Jenny
  90. preAlgebra

    How do you do the problem -4-9

    asked by Blaise
  91. chemistry

    how many moles of solute is present in 40.0mL of 1.000 M of HNO3

    asked by Lauren
  92. English

    can you help me to answer these questions? What lifestyles (lifestyle is a manner of living that reflects the person's values and attitudes) can people lead? What are the main differences among lifestyles? What do you have in mind when you speak about

    asked by CaroLina
  93. biology

    how does a hypothesis help scientists understand the natural world?

    asked by karla
  94. algebra

    here is the question: I am confused about the steps I need to follow to be able to complete this question some explanation will be appreciated :) In a Multiple - choice examination of 25 questions, four marks are given for each correct answer and two marks

    asked by Nancy
  95. English

    I forgot to include these other sentences. 1)They saw trading stations on the river bank consisting of just a broken-down building and a few white men occupying it. 2) Though the natives were like them, they felt frightened because they couldn’t

    asked by Franco
  96. Science

    3 elements that have the same properties most like Helium

    asked by Elena
  97. Science

    A crate is resting on the back of a truck and has a coefficient of of friction of 0.45. What is the maximum acceleration that the truck can undergo before the crate starts to slide off the back of the truck.

    asked by Cassy
  98. Interview

    I'm going to be interviewing someone on the topic " Contributing to the communities" and then turn it into an essay. So I'm wondering if you guy can give me some ideas and question on what to ask the person( The person I'm interviewing is a teacher)?

    asked by Shadow
  99. math

    15-18/9+3 15-2+3 13+3=16

    asked by AnOnYmOuS1
  100. counseling

    What do the following scores (Standard score of 130, a T-score of 70, and z score of 2 and a stanine of 9) have in common

    asked by Jerome
  101. science

    how is it possible to have a negative sun angle?

    asked by emily
  102. Social Studies

    How would being located on a lake and river benefit both a fort and traiding post?

    asked by Asia
  103. math

    (24-10)-3x3= 14-3x3 14-9=5

    asked by AnOnYmOuS1
  104. Physics

    A child is pushing a shopping cart at a speed of 1.5 m/s. How long will it take this child to push the cart down an aisle with a length of 9.3 m?

    asked by Brianna
  105. math

    60/12x(4-1) 60/12x3 5x3=15

    asked by AnOnYmOuS1
  106. math

    (100-25)x2+25 75x2+25 150+25=175

    asked by AnOnYmOuS1
  107. math

    5(35-18)+1 5(17)+1 51+1=52

    asked by AnOnYmOuS1
  108. social studies

    who arethe two french explorers who searched for the nortwest passage?/ what areas did they explorers and discover?

    asked by aadsion
  109. Sam Sharpe Teachers' College

    what is the importance of air in combustion

    asked by ishalee
  110. Algebra 2

    I've got some homework about ellipses and I am not sure if I am doing these right. So if you could check my answers I would appreciate it. Thanks!! 1.) Write an equation for an ellipse if the endpoints of the major axis are at (1,6) and (1,-6) and the

    asked by Kim
  111. US History

    I don't understand what the difference was between the Lodge reservation and the Hitchcock reservation. Both reservations seem to be similar. I have to find a difference.

    asked by Amy~
  112. geography

    Using your knowledge of Location, Place and Region; you will draw to scale and to the best of your ability a map of the United States. I think I have the regions correct, but how do I label it for location and place?

    asked by vickie
  113. Algebra 2 Urgent! please Help!

    simplfy (10x^2-6x-x^3)+(9x+x^3+5x^2) please show all work and steps i have been working on this problem for 10 minutes and still cant figure out how to do it.

    asked by Tristan
  114. spanish

    what does "contesta estas preguntas sobre ti, tu familia, y tus amigos" mean. does it mean answer the questions about yourself, your family, and your friends? does that mean i have to have 3 sentances for each question.

    asked by j
  115. Biology

    If the hydroxide ion concentration in a lake is 10‐10 M what is the lake’s pH?

    asked by Johannie
  116. physics

    how much work is required to extend an exercise spring by 15 cm if the spring constant k has the value of 800 N/m

    asked by jazmyn
  117. math

    kara needs $35 for an aquarium for 6 fish. How can she pay with the least ten and one dollar bill?

    asked by sunny
  118. Chemistry

    In a mountainous location, the boiling point of pure water is found to be 95 degrees Celsius. How many grams of sodium chloride much be added to 1 kg of water to bring the boiling point back to 100 degrees Celsius? Assume that sodium chloride behaves

    asked by Mike
  119. math

    kelly subtracted 2.3 from 20 and got 17.7.explain how this answer is reasonable

    asked by larrial
  120. chemistry

    Light sensitive materials are samples under yellow lighting. Please explain what yellow lighting means.

    asked by annie
  121. Chemistry

    Sorry,please ignore my earlier post. Light sensitive materials are sampled in a room with yellow lighting. How is it different from normal white light?

    asked by annie
  122. Chem

    If the hydroxide ion concentration in a lake is 10‐10 M what is the lake’s pH?

    asked by Johannie
  123. ALGEBRA 2 URGENT! PLEASE HELP!

    Simplify (10x^2-6x-x^3)+(9x+x^3+5x^2)

    asked by Tristan
  124. Structural design part 2

    The structual technique that includes long vertical studs running from the sill plate to the second floor rppf frame is called_____framing. A.platform B.vertical C.balloon D.post Bulging of exterior walls usually results in. A.sagging of windows B.a rise

    asked by sib
  125. physics

    Peggy drives from Cornwall to Atkins Glen in 37 min. Cornwall is 74.8 km from Illium in a direction 22¡Æ west of south. Atkins Glen is 24.6 km from Illium in a direction 18¡Æ south of west. Use Illium as your origin. Find the displacement during the

    asked by Ji
  126. a

    R = 100/T

    asked by sam
  127. English

    I am writing an essay on the worn path. This time I wrote this by myself. (Apart from a sentence). Could you tell me what I need to improve on? Love, the emotion of strong affection and personal attachment. "It erupts like an earthquake and then subsides."

    asked by Anonymous
  128. To:Ms.Sue

    Sorry Ms.Sue but I have a question on the previous answer you gave me and I hope you don't mind answering it,thanks. Earlier you say "What examples do you know about the good that people do who contribute to the community? " Could you explain to me what

    asked by Shadow
  129. spanish

    Mari Bocazas is one of those people who often exaggerates. Whatever you do, she says she does it better, and whatever you have, she says she has more. What would Mari say if you were to tell her that you had each of the following? un(a) novio(a)

    asked by Christopher
  130. math

    Name two ways to get .60 cents without a 50 cent piece and 3 coins.

    asked by Anonymous
  131. calculus

    f (4 + h) - f (4) = 4h^2 + 4h (a) What is f '(4)? (b) What is the slope of the secant line through (4, f (4)) and (7, f (7))?

    asked by Mark
  132. chem

    what is(2.25x10*3)(4.80x10*4)=

    asked by mark
  133. physics

    Traumatic brain injury such as concussion results when the head undergoes a very large acceleration. Generally, an acceleration less than 800 m/s2 lasting for any length of time will not cause injury, whereas an acceleration greater than 1000 m/s2 lasting

    asked by jer
  134. Physics

    A student travels 6.0 m [E] in 3.0 s and then 10.0 m [N] in 4.0 s. Draw a vector diagram to determine the resultant displacement. Q: How do you know where the starting point is on the graph?

    asked by Emily
  135. physics

    A certain car is capable of accelerating at a rate of +0.50 m/s2. How long does it take for this car to go from a speed of 45 mi/h to a speed of 85 mi/h?

    asked by j
  136. Math

    using the terms factor, divisor, multiple and divisible by, write as many statements as you can about the number sentence 4X7=28

    asked by Max
  137. xmgt216

    • Write a 1,050- to 1,400-word paper addressing the following points: o Describe the moral and ethical issues faced by managers dealing with your selected topic. Include how the issue affects other individuals. o Explain how the relationship between

    asked by susie
  138. math

    the unit rate for 442 mi in 8.5 hr

    asked by jenny
  139. math

    y+18=39 y+18-18=39-___ 39-18=21 21+18-18=39-21 Answer-18

    asked by AnOnYmOuS1
  140. math

    n - 4.7 = 8.4 8.4 - 4.7 = 3.7 n-3.7

    asked by AnOnYmOuS1
  141. 5th grade

    Hi i need help with solving this math question.Make an array for each of these number sentences.3*9=27 and 6*7=42

    asked by John
  142. calculus

    Assume the initial investment was $6600 and the annual interest rate to be compounded continuously is 5%. Assume also that the target amount is $7900. If you want the account to contain the target amount given above after 9 years, what yearly interest rate

    asked by nik
  143. math

    m+18=78 78-18=60 m=60

    asked by AnOnYmOuS1
  144. math

    7.36+w=8.94 8.94-7.36=1.58 w=1.58

    asked by AnOnYmOuS1
  145. calculus

    find the arc length from (x1,y2) to (x2,y2) on the graph F(x)=mx+b

    asked by Reed
  146. english

    The Pennsylvia Assembly ordered the Liberty Bell. What would be the complete predicate and verb?

    asked by Anonymous
  147. HS Math

    Please help answer.. What is the principle of powers? When solving a radical equation how do we use the principle of powers to eliminate radicals

    asked by Jen
  148. pre algebra

    evaluate (m+n)-3 power if m=-1 and n=-5

    asked by Isabel
  149. English

    In 1972, the bell was cracked by its own clapper. What would be the complete predicate and verb?

    asked by Anonymous
  150. English

    American patriots hid the bell from the British army. What would be the complete predicate and verb?

    asked by Anonymous
  151. chemistry

    how to simplify (x 3-x)/(x-1)?

    asked by kelly
  152. chemistry

    Butlylated hydroxytoluene (BHT) is used as an antioxidant in processed food. (It prevents fats and oils from becoming rancid.) A solution of 2.500 g of BHT in 100.0 g of benzene had a freezing point of 4.880⁰ C. What is the molecular weight of BHT?

    asked by Mike
  153. chemistry

    What is the freezing pint of 0.0091 m aqueous sodium phosphate, Na3PO4? Assume that sodium phosphate is a strong electrolyte and it functions ideally in solution. (express your answer in degrees Celsius)

    asked by shawn
  154. 4th grade

    what's a good sentence for glacier

    asked by ashley
  155. chemistry

    What is the total vapor pressure4 at 20° C of a liquid solution containing 0.30 mole fraction benzene, C6H6, and 0.70 mole fraction toluene, C6H5CH3? Assume that Raoult’s law holds for each component of the solution. The vapor pressure of pure benzene

    asked by Tim
  156. Chemistry

    Calcium chloride has been used to melt ice from roadways. Given that the saturated solution is 32% calcium chloride by mass, estimate the freezing point. Express your answer in degrees Celsius. Assume that calcium chloride behaves ideally in solution.

    asked by Frank
  157. geometry

    Q is the midpoint of PR. PQ = 3x - 5 and QR = x + 17. What is the value of x?

    asked by Paige
  158. College Chemistry

    Phosphoric Acid is usually obtained at an 85% phosphoric acid solution, by mass. If this solution is 15 M, what is the density of the solution? Express your answer in g/ml

    asked by Tabatha
  159. Algebra

    Twice Beth's daily pay is the same as her daily pay increased by 45$. Find Beth's daily pay.

    asked by Laura
  160. chemistry

    Analysis of a compound gave 39.50% C, 2.20% H, and 58.30% Cl. When 0.855 g of this solid was dissolved in 7.50 g of napthalene, the solution had a freezing point of 78.0° C. The pure solvent freezes at 80.0° C; its molal freezing point constant is 6.8°

    asked by Chris
  161. College Chemistry

    Which of the following changes generally lead to greater reaction rates? (I)Increasing the temperature (II)Decreasing the concentration of a reactant or (III) adding a catalyst I know that change in temperature influences the reaction, in this case it

    asked by James
  162. calculus

    Assume a substance has a half-life of 11 years and the initial amount is 144 grams. How much remains at the end of 5 years? How long will it be until only 30 % remains?

    asked by nick
  163. Pre Calc!

    A drug is eliminated from the body through urine. Suppose that for a dose of 10 milligrams, the amount A(t) remaining in the body t hours later is given by A(t)=10(0.8)^t and that in order for the drug to be effective, at least 2 milligrams must be in the

    asked by Hayli
  164. physics

    A long jumper jumps at a 20 degree angle and attains a maximum altitude of .6 m. a)what is her initial speed? b)How far is her jump?

    asked by Anonymous
  165. 5th grade economics

    The amount you pay for your wants/needs... (5 letters, 4th letter is "e")

    asked by JMom
  166. oil spill

    Does anybody know if the BP oil spill from this year is over?

    asked by AL 92
  167. ALGEBRA 2 URGENT! PLEASE HELP!

    Simplify 8(2^x-1)=64

    asked by Tristan
  168. chemistry

    is INH(CH3)3 an acid, base or neutral?

    asked by Megan
  169. Pre Calc!

    A drug is eliminated from the body through urine. Suppose that for a dose of 10 milligrams, the amount A(t) remaining in the body t hours later is given by A(t)=10(0.8)^t and that in order for the drug to be effective, at least 2 milligrams must be in the

    asked by Hayli
  170. chem

    400.0g of a metal absorbs 10000.J of heat energy and its temperature rises from 20.0*C to 103.0*C. What is he specific heat of the metal

    asked by san b
  171. math

    write the multiplication/division fact family for 2, 7, and 14.

    asked by marissa
  172. chem

    as kelvin temperature increases, the average kinetic energy of the particles in a sample 1.Increase 2.Decrease 3.Remains the same

    asked by chris k
  173. Calculus

    Suppose that f (x) is a function such that the relationship given below is true. f (3 + h) - f (3) = 9h^2 + 8h (a) What is f '(3)? (b) What is the slope of the secant line through (3, f (3)) and (7, f (7))?

    asked by catherine
  174. physics

    A 200 kg motorcycle accelerates at 0.02 m/s2. What force produced this acceleration?

    asked by Anonymous
  175. physics

    A jet plane lands with a speed of 101 m/s and can accelerate at a maximum rate of -4.60 m/s2 as it comes to rest. (a) From the instant the plane touches the runway, what is the minimum time needed before it can come to rest? ___s b)What is the actual

    asked by jc
  176. physics

    A person is standing at the edge of the water and looking out at the ocean. The height of the person's eyes above the water is h = 1.6m. and the radius of the earth is R = 6.38 X 10^6 m. (a) How far is it to the horizon?

    asked by linda
  177. English

    Can you please help me infer about Mah and her past from what she says and does and from what the narrator says about her. This is relating to the excerpt from Bone.

    asked by bindiya farswani
  178. physics

    A cheetah runs a distance of 97 m at a speed of 26 m/s and then runs another 97 m in the same direction at a speed of 34 m/s. What is the cheetah's average speed? ___m/s

    asked by helps
  179. chemistry

    How many milliliters of a 0.50 M solution contain 14.0 g of BaCl2 (Barium Chloride)?

    asked by Emily
  180. Science

    A truck is going from 20 km/h to 59 km/h in .20 hours, has an acceleration of what?

    asked by Abigail
  181. math (trig)

    from the top of a bridge over the burlington canal, maria looks down at a sailboat at an angle of depression 15 degrees.the bridge is 18m above the water. calculate the horizontal distance from the bridge to the sailboat

    asked by haley
  182. chemistry

    how to simplify ((x^3)-x)/(x-1)

    asked by mike
  183. English

    The stadium covers nine-and-a-half acres of land. Would the complete predicate be covers nine-and-a-half acres and the verb be covers?

    asked by Anonymous
  184. algebra 1b

    Arianna kicks a soccer ball off the ground and in the air with an initial velocity of 42 feet per second. Approximately what maximum height does the soccer ball reach?

    asked by james
  185. physics

    The speed of a nerve impulse in the human body is about 100 m/s. If you accidentally stub you toe in the dark, estimate the time it takes the nerve impulse to travel to your brain. (Assume that you are approximately 1.8 m tall and that the nerve impulse

    asked by jer
  186. chemistry

    You have a 22 g sample of ethanol with a density of 0.7893 g/mL. What volume of ethanol do you have?

    asked by Anonymous
  187. 6th grade

    i am a 3 digit number divisible by 3. my tens digit is 3 times as great as my hundreds digit and the sum of my digits is 15. if you reverse my digits i am divisible by 6 as well as 3. what number am i?

    asked by brandon
  188. Calculus

    Find an expression for the function whose graph is the given curve. The top half of the circle x^2 + (y-2)^2 = 4 Please Help. I don't even know where to start.

    asked by Chelsea
  189. Algebra

    need help in solving by substitution. We all have different steps and all arrive at 3 different ordered pairs. please help and show the steps for 7x+6y=15 and -7x+y=27. Thanks

    asked by Team A
  190. English

    What is the relationship between man and nature?

    asked by Shaniqua
  191. PreCal

    log(5x+1)=2+log(2x-3) log(5x+1)-log(2x-3)=2 (5x+1)/(2x-3)=10^2 what do i do after that?

    asked by Hayli
  192. spanish

    i need multiple responses to these questions im stuck 1. Hablen sobre los aparencias, creencias y aficiones de: -los hippies, los yuppies, los emo, los Y me 2. Lo que me encanta de ______ es que ... Lo que me fastidia de ______ es que... Lo que me

    asked by ..
  193. 7th grade

    what is social health? what is mental/emotional health?

    asked by mabel
  194. English

    In one room we saw several unusual computers. Would the complete redicate be unusual computers and the verb unusual

    asked by Anonymous
  195. alegebra

    im in 7 th grade but doing alegebra pizzaz riddle why do girls like guys who ear shirts with eight buttons

    asked by john
  196. inglish

    WHat is the relationship between man & nature?

    asked by Shaniqua
  197. English III

    where would I look to find out what my last name.What is the country of origin of my last name

    asked by Betty
  198. chemistry

    What is the half-life of an isotope if it decays to 12.5% of its radioactivity in 18 minutes?

    asked by fatin
  199. 20th Century World History

    I have to come up with an Internal Assessment topic for history, and I want something that focuses on Trotsky, but I'm having trouble thinking of a good topic. I would've liked to compare the roles of Trotsky and Lennin in the October Revolution, but my

    asked by Lauren
  200. math

    how to simplify (x^3-x)/(x-1)

    asked by mike
  201. chemistry

    Propane is widely usid in liquid form as a fule for barbecue grills and camp stoves for 58.5g of propane, calculate the following quantities. The grams of carbon?

    asked by Missy
  202. Chemistry

    .4941g of an iron-containing compound yielded .1116g of Fe2O3 upon oxidation. What is the mass percent of iron in the compound?

    asked by Missy
  203. English

    On the way home, we stopped at the Astrodome for a tour. Is the complete predicate we stopped at the Astrodome for a tour and the verb stopped?

    asked by Anonymous
  204. 8th grade

    what vegetable has these letters? HARBRUB?

    asked by Hanna
  205. chemistry

    how many moles of CO2 are produced from 2.90 moles of C3H8? C3H8 + 5O2 yields 3CO2 +4H2O

    asked by Missy
  206. Calculus

    Suppose that f (x) is a function such that the relationship given below is true. f (3 + h) - f (3) = 9h^2 + 8h (a) What is f '(3)? (b) What is the slope of the secant line through (3, f (3)) and (7, f (7))? Please do not use shortcuts(from future chapters)

    asked by catherine
  207. chemistry

    calculate the specific heat (j/g C ) for each of the following: -an 18.5-g sample of tin that absorbs 183 J when its temperature inceases from 35.0 degrees C to 78.6 degrees C

    asked by kelly
  208. math

    how would you use the concepts from chapter 8 in real life situation? Decribe how these concepts might be useful

    asked by davis
  209. science

    is a firecracker exploding great example of potential energy or can I describe a better example

    asked by san col
  210. General information

    Does this mean that we are allowed to copy this image and paste it somewhere else? This image may be subject to copyright.

    asked by Anonymous
  211. calculus

    Find the limit L. Then find delta > 0 such that |f(x) - L| < 0.01 whenever 0 < |x-c| < delta. lim x -> 4 (4- (x/2))

    asked by James
  212. Chemistry

    Oxygen reacts 1:2 with sodium and is a colourless gas; chlorine reacts 1:1 with sodium and is a yellow gas; neon does not reacts with sodium and is a colourless gas. Suppose that a new element , pretendium, has been dicovered, and it is noted that this

    asked by Anonymous
  213. science

    how are alkali metals and alkali earth metals different?

    asked by Emily
  214. 12th grade chemistry

    The number of electrons in an atom of Iron-56 is

    asked by san col
  215. BIS155

    can i get help with this class

    asked by kobe brown
  216. English

    Every year the Astrodome attracts thousands of tourirts. Would the complete predicate be attracts thousands of tourists and verb be attracts

    asked by Anonymous
  217. chemistry

    the # of protons in an atom of sodium-23 is

    asked by mary
  218. 8th grade Math

    2k+3=15 k=4 but prove why this is true using what you already know

    asked by fearkiller
  219. art

    who is picasso?

    asked by Brandy
  220. Calc

    Find an expression for the function whose graph is the given curve. The top half of the circle x^2 + (y-2)^2 = 4 Please Help. I don't even know where to start.

    asked by Chelsea
  221. Internal Assessment Topic

    I have to come up with an Internal Assessment topic for history, and I want something that focuses on Trotsky, but I'm having trouble thinking of a good topic. I would've liked to compare the roles of Trotsky and Lennin in the October Revolution, but my

    asked by Lauren
  222. home economics

    how many carreers can you get by doing home economics

    asked by Anonymous
  223. chemistry

    How many liters of water must be added to 4 liters of a 6 molar HNO3 solution to create a solution that is 2 molar?

    asked by Hiba
  224. chem

    one isotope of carbon has the atomic # 6+ the mass #14. An Atom of this isotope contain how many elctrons

    asked by peter
  225. math

    4 digit number greater than 8000 disvible by 5 sum of all digits equals 20?

    asked by Rhys
  226. physics

    A particle leaves the origin with an initial velocity v=(2.40 m/s)x hat and moves with a constant acceleration a=(-1.90 m/s ^2)x hat+(3.20 m/s ^2)y hat. How far does the particle move in the x direction before turning around? Answer is 1.48 m. What is the

    asked by Ka
  227. math

    4 digit number. numeral in tens place 3 times the numeral in hundreds place. numeral in my ones place is 2 more than numeral in hundreds place. numeral in thousands place is 3 less than number in tens place. number in hundreds place is 3. what is number?

    asked by Owen
  228. statistics

    A sample of n = 5 college students yielded the following observations on number of traffic citations for a moving violation during the previous year. Calculate s2 and s. (Round all answers to four decimal places.) s2 = 1 s = 2

    asked by denise
  229. 8th grade math

    I need the equation for these numbers: 3, 9, 19, 33, 51 I see that the pattern goes up by 6, then 10, then 14, then 18 (4 more each time)

    asked by Lisa
  230. Civics and Economics

    what was the problem and solution in the Electoral College Compromise?

    asked by Tweety
  231. math

    140/297

    asked by Anonymous
  232. 5th grade

    How did a bill become a law??

    asked by Andrea
  233. English

    We will be seeing it on our field trip to Philadelphia. would the complete predicate be will be seeing it on our field trip to Philadelphia and the verb be will be seeing?

    asked by Anonymous
  234. physics

    What is the average time interval between heartbeats? what is the average time between a hummingbird flaps its wing?

    asked by Jennie
  235. Chemistry

    NaOH+HNO3---> NaNO3+H2O calculate the number of moles of every ion present in solution after the reaction has occurred.

    asked by Hiba
  236. social studies

    write a sentence that explains how the terms tributary and drainage basin are realated

    asked by Anonymous
  237. Chemistry

    In which reaction does the oxidation number of oxygen increase? a. Ba(NO3)2+K2SO4--->BASO4+2KNO3 b. HCL+ NaOH---> NaCl+H20 c. Mg0+ H20---> Mg(OH)2 d. 2SO2+02---> 2SO3 e. 2H2O---> 2H2+O2

    asked by Hiba
  238. calculus

    Find the average rate of change of the function f(x) = 2x4 + 3x2 ¡ x + 2: (a) on the interval [0; 3] and (b) on the interval [¡2; 0]

    asked by Preston
  239. Calculus

    Determine the equations of the following lines: (a) having slope ¡1 and passing through (0; 2) (b) parallel to y=2x-1 and passing through (¡2; 0) (c) passing through (1; 0) and (¡1; 3) (d) with x-intercept 6 and y-intercept 3.

    asked by Preston
  240. Calculus

    Many scientists believe that there have been four Ice Ages in the past 1 million years. Before the technique of carbon dating was known, geologists erroneously believed that the retreat of the Fourth Ice Age began about 25,000 years ago. In 1950, logs from

    asked by Preston
  241. Calculus

    Find the exponential curve through (7; 10) and (9; 250). Recall that an exponential curve is one given by the equation y = A ¢ bx (i.e. is the set of all points (x;A ¢ bx).

    asked by Preston
  242. calculus

    Suppose that a colony of fruit °ies is growing according to the exponential law P(t) = P0ekt, and suppose that the size of the colony triples in 11 days. Determine the growth constant k. [You may leave your answer as a fraction, with logarithm(s) in it.]

    asked by Preston
  243. math

    i need help on doing 442 mi in 8.5 hr and i don't know how to do it can you help me?

    asked by brian
  244. chemistry

    an organic iron compound consisting of Fe, C, H, and O was found to contain 51.043%C, 5.9886%H, 27.17%O, and 15.80%Fe. how many moles of each element are in 100g of the compound

    asked by Missy
  245. chemistry

    A hydrocarbon contains 4.65g of carbon and .382g of hydrogen. how many moles of each element are present in this compound?

    asked by Missy
  246. chemistry

    how many moles of Cl2 will be produced from the reaction of 9.61 moles of HCl? MnO2 + 4HCl = MnCl2 +Cl2+2H2O

    asked by Missy
  247. AP Stats

    The distribution of heights of adult American men is approximately normal with mean 69 inches and standard deviation 2.5 inches. Use the 68-95-99.7 rule to answer the following questions: (d) A height of 71.5 inches corresponds to what percentile of adult

    asked by Emily
  248. lititure

    what is the rising action in the story "The School Play' By: Gary Soto

    asked by alma
  249. geometry

    what is the formula to find a slope on a graph?

    asked by dante
  250. Physics

    A fisher sets out to check his fishing nets and heads 15 km/h [N] for 0.20 h. After stopping for 0.50h, he travels at 12 km/h [E] for 0.10 h to get to the next set of fishing nets. a) What is the fisher's displacement to get to the first set of nets? ( I

    asked by Emily
  251. english

    i cant make sentence of excuse

    asked by ayu
  252. English Literature

    Unferth accuses Beowulf of "wantonly tempting the waves" and risking his life for a "silly boast." Given what Beowulf and the narrator say about Unferth, how is Unferth's comment a reflection back on himself? How does it apply when we think about Grendel?

    asked by Joshua
  253. computer

    Please help me with this if you don't mind Web page my home whole document with 2 links first page with 1 link selection with 1 link world travel framed page as shown with 1 link each frame separately with 3 links prices and packages - a single frame with

    asked by wan
  254. math

    how would you write 814 thousand of an ounce

    asked by erika
  255. physics

    If your car decelerates at a rat of 4.5 m/s2 how long will it take for your car to stop?????

    asked by Megan
  256. chemistry

    what particles with electrical charges repel one another

    asked by San
  257. Chemistry

    A newly discovered giant planet has an aver- age radius 12 times that of the Earth and a mass 722 times that of the Earth. Calculate the ratio of the new planet’s den- sity to the Earth’s density.

    asked by Daniel
  258. physics

    How much force is needed to accelerate a 78kg skier 2m/s/s/

    asked by cheyenne
  259. english

    what is agood sentence for a word cofused

    asked by ayu
  260. chemistry

    the # of electrons in an atom of Iron-56 is

    asked by hermosa
  261. geometry

    You have a slice of pizza with a central angle that measures 140° that you want to share with your friend. She cuts it through the vertex into two slices. You choose one slice that measures 60°. How many degrees are in the other slice?

    asked by jackie
  262. chei

    .0815moles NO are reacted with .0789moles O2 gas to from NO2 gas according to the following equation: 2NO + O2 = 2NO2 determine the molar amounts of NO, O2, and NO2 after complete reaction.

    asked by Missy
  263. chemistry

    .0815moles NO are reacted with .0789moles O2 gas to from NO2 gas according to the following equation: 2NO + O2 = 2NO2 determine the molar amounts of NO, O2, and NO2 after complete reaction.

    asked by Missy
  264. English

    In Handmaid's Tale, What can you tell about the period just from the first sentence? "We slept in what had once been the gymnasium?" What I put was that it was from long time ago because a gymnasium is used for playing sports, not to sleep and in this

    asked by John
  265. social studies

    in the first chapter of the book,section 1 review.i need help with number 3 and 4. number 3 is in what ways did native american cultures shares traditions and knowledge. and #4 is how do the mound builder societies provide evidence of the spread of

    asked by imaani
  266. chemistry

    2Br- + Cl2 = 2Cl- +Br2 how many moles of chlorine gas, are required to react with 169g of bromide(Br-)?

    asked by Missy
  267. Math

    Determine the value(s)of k that give the type of solution indicated: 2x^2+5x-2(k-1)=0. Show your work.

    asked by Mr. Seuss
  268. chemistry

    How many grams of Li3N can theoretically be produced from 1.77 moles of Li? 6Li+N2 = 2Li3N

    asked by Missy
  269. chemistry

    CaCO3 = CaO +CO2 after a 15.8g sample of calcium carbonate was heated in an open container to cause decompostition the mass of the remaining solid was determined to be 9.10g. calculate the mass of carbon dioxide produced.

    asked by Missy
  270. calculus

    Suppose that f (x) is a function such that the relationship given below is true. f (3 + h) - f (3) = 9h^2 + 8h What is the slope of the secant line through (3, f (3)) and (7, f (7))? I am stuck on this one , tried every thing in the world. i don't know how

    asked by catherine
  271. math

    find the unknown number in equation 9s=17+1

    asked by lance
  272. Chemistry

    SrH2 +2H2O = Sr(OH)2 + 2H2 You wish to calculate the mass of hydrogen gas that can be prepared from 7.74g of SrH2 and 6.45g of H2O How many moles of H2 can be produced from the given mass of SrH2? How many moles of H2 can be produced from the given mass of

    asked by Missy
  273. Chemistry

    Potassium permanganate reacts with sulfuric acid as per the equation shown below. Indicate the amount of excess reactant after the reaction of 7.24g KMnO4 and 10.32g H2SO4? 4KMnO4+6H2SO4 = 2K2SO4 +4MnSO4 +6H2O + 5O2

    asked by Missy
  274. calc bc

    is the limit as x approaches 0 of sin3x over 3x equal to zero? thank you!

    asked by APpreciative student
  275. chemistry

    .0815 moles NO are reacted with .0789moles O2 gas to form NO2 gas according to the following equation: 2NO +O2=2NO2 determine the molar amounts of NO, O2 and NO2 after complete reaction.

    asked by Missy
  276. verb and noun

    how do I know where is the noun and verb of this sentences. Guess who came to the party? The dog ranto the window.

    asked by davil
  277. Calc

    Find the domain. f(x)= 3 - 1/2x if x less than or equal to 2 = 2x - 5 if x > 2 Please help... an explanation would be wonderful, so I can understand how to do this.

    asked by Chelsea
  278. math

    Tonya and Lauren are designing a soccer uniform. They want to use two colorson the shirt. Their choices are green,orange,yellow, purple, blue, and silver.How many ways can they choose two colors?

    asked by reena
  279. math

    Estimating and dividing with greater numbers: 794 divided by 46

    asked by Alvin
  280. algebra

    Why is it important to simplify radical expressions before adding or subtracting?

    asked by tina
  281. calc bc (condensed

    is the limit as x approaches 0 of sin3x over 3x equal to zero? sorry-- basically this is my problem: lim [sin 3x / 4x) x-> 0 ~~~~I multiplied& eventually got to .75* lim (sin 3x / 3x) x-> 0 ~so i figured since (lim (sinx/x) x-> 0 was equal to zero, then

    asked by APpreciative student
  282. Physics

    Estimate the average force exerted by a shot-putter on a 6.5 kg shot if the shot is moved through a distance of 2.7 m and is released with a speed of 11 m/s.

    asked by Phil
  283. 5th grade math

    Larsen's class collected 137 cans. Schmidt's class collected 87 cans & Lopez's class collected 197 cans. Use mental math to see how many more cans Lopez's class collected than Schmidt's. (Got answer of 110) How many more cans did Larsen's class collect

    asked by lost
  284. chemistry

    .0815 moles NO are reacted with .0789moles O2 gas to form NO2 gas according to the following equation: 2NO +O2=2NO2 determine the molar amounts of NO, O2 and NO2 after complete reaction.

    asked by Missy
  285. Math

    What is the average births per day if the average birth per second is 4 1/5? What is the average deaths per hour if the average death per second is 1.7?

    asked by Jay
  286. Chemistry

    The rate law of a reaction, A-> B+C is given by the expression: Rate=k, where k=0.0113 mol/L min. If the initial concentration of the reactant is 0.225 mol/L, how long does it take for the concentration to decrease to 0.180 mol/L? I know i have to find the

    asked by James
  287. chemistry

    [Cu(NH3)4]2+ + SO4(aq)2 + H2O [Cu(NH3)4]SO4•1H2O What is the theoretical yield of the products?

    asked by Leila
  288. math

    I don't understand this question so if you don't mind will you help me by showing work so I can understand. Monica has a backyard in the shape of a square. Which of the following is a possible are of the yard? A)32 square feet B)99 square feet C)64 square

    asked by sherkyra
  289. Chemistry

    How many moles of H2 can be produced from 7.74g SrH2? equation:SrH2 + 2H2O = Sr(OH)2 + 2H2

    asked by Melissa
  290. 11th grade math

    y=4x^2-16x+12

    asked by Deanna
  291. Biochemistry

    Sorry! HEPES, is a commonly used component of physiological buffers. The PKa of the protonated amino group of HEPES is 7.55 at 25C. Describe the preparation of 1.00L of 0.100M HEPES buffer, pH 8.00, from the sodium salt of the basic form of HEPES (MW

    asked by Angel
  292. math

    Kevin has a rabbit, ferret, a gerbil, and a turtle. He feeds them in a different order each day. In how many different orders can kevin feed his pets?

    asked by reena
  293. 5

    43x - 6 for an input of 4

    asked by joey
  294. Physics

    An elastic cord is attached to two back teeth and stretched across a front tooth. The purpose of this arrangement is to apply force to the front tooth. If the tension in the cord is 1.2 N what are the magnitude and direction of the force applied to the

    asked by Mr. D
  295. chem

    when K temperature increases, the average kinetic energy of the particles in a sample do?

    asked by montery
  296. College Physics

    A 1200 kg airplane starts from rest and with a constant average forward acceleration of magbitude 5.0 m/s, reaches its takeoff speed in 9.00 s. The runway is 300 m long. What is the plane's takeoff speed?

    asked by Dakota
  297. Physics I

    A person is attempting to swim directly across a river. They are able to swim at a speed of 0.500 m/s relative to the water. The river is 25.0 m wide and the person ends up 50.0 m downstream from their starting point. How fast is the current in the river?

    asked by Dazed and Confused
  298. 5th grade

    i need help with this problem what is the mode for the following number? 15,31,32,20,29,32,13 thanks!!

    asked by pat
  299. 5th grade

    what is the value of x in the equation 25=10+? please! help me one more time.

    asked by pat
  300. Astronomy

    Do people wear seatbelts to protect themselves from speed or acceleration?

    asked by Dre
  301. Psych

    How does nature and nurture contribute to one’s self-efficacy?

    asked by Carmen
  302. 5th grade

    how will the value of 32,184,567 change if the number 2 is replaced by 9? this will be my last question for today thank you!!

    asked by pat
  303. math

    what are the prime factors of a number greater than 5 but less than 13. What is the number?

    asked by reena
  304. calculus

    if h(t) represents the height of an object above ground level at time t and h(t) is given by h(t)=-16t^2+13t+1. find the height of the object at the time whent eh speed is zero

    asked by Jenny
  305. Math

    Find: Re[1/(2+j)] Im[2+j/(3+4j)]

    asked by Jacob
  306. statistics

    what is the standard deviation if 12 randomly chosen students were asked how many times they had missed class during a certain semester with this result 2,1,5,1,1,3,4,3,1,1,5,1,8.

    asked by clemencia
  307. Physics

    A child on a sled reaches the bottom of a hill with a velocity of 12.0 m/s and travels 22.0 m along a horizontal straightaway to a stop. If the child and sled together have a mass of 59.0 kg, what is the magnitude of the average retarding force on the sled

    asked by Phil
  308. algebra

    the perimeter of a rectangle is 222 inches. the length exceeds the width by 47 inches. what is the length and width

    asked by Anonymous
  309. Calculus

    Find the exponential curve through (7, 10) and (9, 250). Recall that an exponential curve is one given by the equation y = A * bx (i.e. is the set of all points (x,A * bx).

    asked by Preston
  310. Cemistry

    Can an object experience both a physical and chemical change at the same time?

    asked by Jim
  311. Astronomy

    Compared to the Sun's gravitational force on the Earth, what is the Sun's gravitational force on Jupiter. Jupiter's average distance from the Sun=5AU Earth's average distance from the Sun=1AU Jupiter's mass is 300 times larger than Earth. I think the

    asked by Anonymous
  312. math

    why is 23 deficient?

    asked by cody
  313. English

    1. What are your opening hours? 2. When are your opening hours? 3. What is your opening hours? 4. When doe the museum open? 5. We are closed on Mondays? (Would you check the sentences? Are all OK? What is the part of speech of 'closed'?)

    asked by rfvv
  314. Astronomy and Space

    Using a telescope, which planets acn be observed from Earth in a crescent moon phase?

    asked by Dan
  315. MATH

    whats the value of 0.4297

    asked by EMILY
  316. algebra help

    Need help to simplify it. 3{-1+4[4-3(-4+5)]}=

    asked by john
  317. Physics

    Given VectorA=12i+7j-5k and Vector B= 2i-4j+3k 1)Find angle theta between vector A and vector B? 2)Fine VectorB x VectorA How would I go about doing these problems ?

    asked by Rima
  318. Physics/Astronomy

    What would a person's weight be on Mars compared to one's weight on Earth?

    asked by Mike
  319. Physics

    An airplane flies 200 km due west from city A to city B and then 345 km in the direction of 32.0° north of west from city B to city C In straight-line distance, how far is city C from city A?

    asked by Lisa
  320. Math

    A rectangular closet has a perimeter of about 20 feet and a width of about 3 feet. Find the diagonal.

    asked by Cassie