Questions Asked on
October 5, 2012

  1. chemistry

    Acrylonitrile (c3H3N ) is the starting material for many synthetic carpets and fabrics. It is produced by the? following reaction: 2C3H6 (g) + 2NH3 (g) + 3O2 (G0 - 2C3H3N (g) + 6H2O (g) If 15.0 g C3H6, 10.0 g 02, and 5.00 g Nh3 are reacted, what mass of

    asked by maz
  2. physics

    The coefficient of static friction between the 2.3 kg crate and the 35.0° incline of Figure P4.47 is 0.241. What minimum force, F, must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

    asked by Anonymous
  3. Math(Please help, thank you)

    For an experiement to test elastic collision, ball 2 was at rest and ball 1 was released from a certain height and distance and hit ball 2. A set of measurements were collected which was v1 and v2 prime for each ball. I need to calculate the kinetic energy

    asked by Hannah
  4. physics

    Two packing crates of masses 7.88 kg and 4.62 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 4.62 kg crate lies on a smooth incline of angle 40.0°. a) Find the acceleration of the 4.62 kg crate

    asked by Anonymous
  5. Math

    A piece plywood 24 inches wide is cut into strips 2 and a half inches wide, how many strips of this with can be cut. Please help,7th grade.

    asked by Barry
  6. Math

    what is the written form of .6045?

    asked by Mary
  7. physics

    A hockey puck is hit on a frozen lake and starts moving with a speed of 14.4 m/s. 3.0 seconds later, its speed is 7.3 m/s. (b) What is the average value of the coefficient of kinetic friction between puck and ice?

    asked by Anonymous
  8. Math

    If a^x

    asked by Whizkid
  9. chemistry

    The formulas for ethane, ethene and ethyne are C2H6, C2H4, and C2H2 respectively. Rank this chemicals 1,2,3 (highest)in terms of strength of IMF and explain the structures of the three molecules. I rank these three based on the bond length so I got C2H2,

    asked by Lea
  10. math

    How can knowing the multiplication properties help you evaluate 5x(20x63)?

    asked by Kiera
  11. physics

    A car is equipped with a bumper that is designed to absorb collisions. The bumper is mounted to the car using pieces of flexible tubing. The car is traveling at 1.5 m/s when it collides with a rigid black wall. If the wall exerts an average force of 44.1

    asked by Vmel
  12. physics

    If M and m are particles connected by light inextensible string. M is held at center and rotated about horizontal axis as M is in equilibrium.What is torque ABOUT ITS CENTER

    asked by Anil
  13. chemistry

    Rank C2H6O, C3H8O and C4H^10 O in terms of IMF and explain their structures? neeed heeelppp.thank you

    asked by tracy
  14. math

    A poster is 12 inches longer than it is wide. Find a function that models its area A in terms of its width w.

    asked by monic
  15. math

    The height of a cylinder is three times its radius. Find a function that models the volume V of the cylinder in terms of its radius r.

    asked by monic
  16. math

    A rectangle has an area of 15 m2. Find a function that models its perimeter P in terms of the length x of one of its sides.

    asked by monic
  17. math

    The sum of two positive numbers is 90. Find a function that models their product P in terms of x, one of the numbers.

    asked by monic
  18. math

    A right triangle has one leg four times as long as the other. Find a function that models its perimeter P in terms of the length x of the shorter leg.

    asked by monic
  19. math

    The volume of a cone is 190 in3. Find a function that models the height h of the cone in terms of its radius r.

    asked by monic
  20. Physics

    Two packing crates of masses m1 = 10.0 kg and m2 = 3.20 kg are connected by a light string that passes over a frictionless pulley as in the figure. The 3.20-kg crate lies on a smooth incline of angle 44.0°.

    asked by Utsa
  21. Physics

    4. A football player passes the ball. The ball leaves his hand and is caught 1.7 seconds later by a receiver 30 meters away. (You may assume the ball was caught at the same height from which it was thrown.) a) What is the vertical component of the velocity

    asked by Anonymous
  22. college algebra

    solve x^6 - 64 = 0

    asked by Martha
  23. physics

    Two blocks each of mass 3.65 kg are fastened to the top of an elevator as in the figure. (a) If the elevator accelerates upward at 1.48 m/s2, find the tensions T1 and T2 in the upper and lower strings. (p4.21a1), enter the answer for T2, the tension in the

    asked by Anonymous
  24. physics

    The coefficient of static friction between the 2.3 kg crate and the 35.0° incline of Figure P4.47 is 0.241. What minimum force, F, must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

    asked by Anonymous
  25. physics

    A 5.20 package slides 1.57 down a long ramp that is inclined at 13.0 below the horizontal. The coefficient of kinetic friction between the package and the ramp is = 0.305 Calculate the work done on the package by friction. Calculate the work done on the

    asked by Matt
  26. French

    So i have to answer questions from my french textbook called on y va! 1 and on page 34 theres this article about microbes and 3 called rhinovirus,lacotobacillus and bacillus cereus Heres the questions ________________________________________ Quel miscrobe

    asked by Please Help ;D
  27. Mathematics

    Two points P(32degree N, 47 degree W) nd Q(32degree N, 28 degree E) are on the earths surface. Find d radius of the parallel of latitude through P

    asked by Blossom
  28. science

    A prisoner that is funny would be what periodic table element?

    asked by ashley
  29. business

    What data and stats do you need to know in order to identify profitable nations in which to export.

    asked by Lisa
  30. English

    1. He wants to be a singer in the future. 2. He was a lawyer in the past. 3. He is a doctor in the present. 4. He is a doctor at present. 5. He is a doctor at the moment. 6. He is a doctor currently. 7. He is a doctor now. 8. He is a doctor at the present.

    asked by rfvv
  31. Chemistry

    In a titration of 35.00 mL of 0.737 M S, __________ mL of a 0.827 M KOH solution is required for neutralization.

    asked by Charlie
  32. physics

    a bomb of mass 5 kg explodes in to two equel fragments. At what angle these fragment fly apart ?

    asked by an
  33. Chemistry

    In a titration of 35.00 mL of 0.737 M S, __________ mL of a 0.827 M KOH solution is required for neutralization.

    asked by Charlie
  34. physics

    If motion of a particle of mass (m) is given by y=ut+1/2gt^2 (square).find force acting on it

    asked by an
  35. math 5

    why is two hundredths written as 1.02 and not as 1.2?

    asked by tameka
  36. english

    Which sentence is correct?Select one of the options below as your answer: A. One can never have two many friends. B. One can never have too many friends. C. One can never have to many friends.

    asked by nick
  37. Precalculus

    The owner of a horse stable wishes to set up 4 rectangular corrals of identical dimensions along the back wall of an existing barn using 200 ft of fencing. The sides of each corral will be attached to the barn, fencing is not needed along the back wall.

    asked by Cole
  38. HISTORY

    Which of the following groups benefitted the least from the prosperity of the second industrial revolution?

    asked by Anonymous
  39. manufacturing

    state the application of theory and design consideration of turnig

    asked by fatin
  40. chem

    Write the complete ionic equation for Cu(NO3(aq)+K2S(aq)and namd write the formula for the spectator ions in this reaction? This is what I got pls. check it: complete ionic equation: Cu^19aq)+K^1(aq)+S^-2(aq)=K^1(aq)+NO3^-1(aq)+Cu2S(s) net ionic equation:

    asked by Amanda
  41. chemistry

    What two conditions necessary for molecules to be polar? Her's my answer pls check. First, at least one covalent bond in the molecule has to be a polar covalent bond. For a bond to be polar, there must be a difference in the electronegativities of the two

    asked by shay
  42. math

    A certain computer can perform 105 calculations per second. How many calculations can it perform in 10 seconds?

    asked by Kate
  43. maths magic

    here is a math trick i.e,45-45=45.how is that explain me

    asked by nanbala
  44. US History

    In need of help, Who Did Alfred T Mahan Look Up To As A Child?

    asked by Jon B
  45. physics

    A 0.73 kg ball is thrown straight up with an initial velocity of 2.50 m/s. Taking the potential energy of gravity to be zero at the height from which the ball is thrown, determine its gravitational potential energy at the balls highest point. Ignore air

    asked by nate
  46. chemistry

    Water has a bent molecular shape, but what if water had a linear molecular shape would the molecule be polar or non-polar? Explain This is what I know pls correct me if I'm wrong. It would be nonpolar because it is symmetric so the charge is equally

    asked by lea
  47. US History

    What Did Alfred T Mahan challenges He Faced Growing Up

    asked by Jon B
  48. Calculus

    Find the derivative of y=15x^7+7^x+22

    asked by Jack
  49. chemistry

    When will hydrogen bonding occur?Give an example of liquid other than H2O in which this type of force is important. In order for a hydrogen bond to occur there must be both a hydrogen donor and an acceptor present. The donor in a hydrogen bond is the atom

    asked by tracy
  50. math

    Fast Fact. Eight states border one or more of the five Great Lakes. Write a fraction representing the part of the 50 states that border a Great Lake. Write the fraction in simplest form.

    asked by keem
  51. critical thinking/logic

    use the direct and the counterexample methods to show that these arguments are invalid? For the counterexample method, display the form used. 1. There could be lightening without thunder. So, there could be thunder without lightening. 2. Nothing its better

    asked by marien
  52. Chemistry

    Muriatic acid is the common name of industrial-grade hydrochloric acid (HCl). One of its uses is to clean or etch concrete in preparation for sealing or painting. It is typically sold in 5.00 gallon buckets, with a concentration of 11.7 M. a.What volume of

    asked by Amber
  53. Physics

    Tarzan swings on a vine 6.8 m long. The tension in the vine is 1200 N if he's moving at 2.9 m/s when the vine is vertical. What is his mass?

    asked by Chelsey
  54. Physics

    An object of mass 1.4kg is placed 12.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the object remains fixed on the turntable until a rate of 36 rpm is reached, at which point the object

    asked by Chelsey
  55. Physics

    When you're driving your 1200-kg car, you go around a corner of radius 60.8 m. The coefficient of static friction between the car and the road is 0.67. Assuming your car doesn't skid, what is your speed if the force exerted on it is 5800N?

    asked by Chelsey
  56. math

    Original amount $ 90 New amount $84.50 find the percent of increase or decrease

    asked by Anonymous
  57. math

    what must be added to each of the following expressions to make it a whole square (i) 4x^2 - 12x + 7 (ii) 4x^2 - 20x + 20

    asked by TUHITUHI
  58. physics

    A 6.0 Kg object undergoes an acceleration of 2.o m/s squared. what is the magnitude of the net external force acting on it?

    asked by ricky
  59. calculus

    Integrate sinx+cosx/rootsin2x with respect to dx...plzz help me

    asked by abhi
  60. health

    The key to using a pedometer to meet the Physical Activity Guidelines for Americans is to _________. A. First set a time goal and then calculate how many steps are needed each day to reach that goal B. First set a time goal and then calculate how rigorous

    asked by Madison
  61. physics

    how long will it take a 1750-watts motor to a lift a 285-kg piano to a sixth storey window 1.6 meters above

    asked by kyla
  62. Astronomy

    If M is the mass of one body and m is the mass of another body, and their separation is d, then the gravitational force between them is proportional to

    asked by Haley
  63. math

    Integrate x^2/rootx-1..

    asked by abhi
  64. Math

    _ _ x _ = _ _ _ = _ _ x _ use number 1 - 9 using each each number only once

    asked by AB
  65. chemistry

    25mL of tartaric acid solution is titrated against 31mL of NH4OH. What is the normality of the NH4OH? Please explain how to work this problem.

    asked by Stephen
  66. Algebra 2

    Find f(x), if f(2b-1)=6b+2

    asked by Sherina
  67. Physics

    A 2000 kg car is slowed down uniformly from 18.0 m/s to 5.00 m/s in 4.20 s. (a) What average total force acted on the car during that time? (b) How far did the car travel during that time?

    asked by Dee
  68. art 101

    According to the author, a. the interpretation of a work of art is objective. b. a work of art may fall into more than one theme. c. it doesn’t make sense to compare art from different cultures. d. all of these are the case: the interpretation of art is

    asked by elizabeth
  69. american history

    Which of the following nineteenth-century inventors is associated with Menlo Park in New Jersey? A. Cyrus W. Field B. Thomas Alva Edison C. Alexander Graham Bell D. Gustavus F. Swift

    asked by tiffany
  70. history

    In the Battle of _______, a disastrous charge against forces holding Cemetery Ridge led to Confederate defeat A. Cold Harbor B. Vicksburg C. Antietam D. Gettysburg

    asked by tiffany
  71. history

    As ratified in 1870, the _______ Amendment prohibited any state from denying the vote to any male citizen on account of race, color, or previous condition of servitude. A. Thirteenth B. Sixteenth C. Fifteenth D. Fourteenth

    asked by tiffany
  72. Algebra 2

    Find f(x), if f(2b-1)=6b+2

    asked by Sherina
  73. Chemistry

    If 50.00mL of 1.10M NaOH is added to 25.00mL of 1.86M HCl, with both solutions originally at 24.70 degrees Celsius, what will be the final solution temperature? (Assume that no heat is lost to the surrounding air and that the solution produced in the

    asked by Tasnim
  74. english

    The following sentence is missing punctuation: “The crowd upset by the delay began to chant loudly for the band to appear.” Explain where the error has occurred in this sentence and how it can be fixed. 6. Identify which one of the following sentences

    asked by cathy
  75. english

    Identify which one of the following sentences is missing punctuation. Please correct the error and explain why the correction is necessary a. I woke up when the book slipped from my lap and landed on my foot. b. After the book slid from my lap and landed

    asked by cathy
  76. english

    Identify which one of the following sentences contains an unnecessary comma. Please correct the error and explain why the correction is necessary. a. I must have been completely absorbed in my work, because I totally forgot about the meeting. b. Because I

    asked by cathy
  77. Chem

    Potassium permanganate (KMnO4) solutions are used for the determination of iron in samples of unknown concentration. As a laboratory assistant, you are supposed to prepare 200. mL of a 0.300 M KMnO4 solution. What mass of KMnO4, in grams, do you need? I

    asked by Anonymous
  78. math

    if x^4 + 1/x^4 =42 .find x+1/x

    asked by TUHITUHI
  79. math

    x^2 + 1/x^2 = 47. find the value of x+ 1/x and x- 1/x

    asked by TUHITUHI
  80. Physics

    when temperature are near absolute zero, what process causes atoms to begin to clump? Plasmology Condensate Cornell - Weizmann condensation Bose-Einstein condensation Is it d?

    asked by randomchik
  81. science

    a puppy runs a distance of 20m to its mother ina time 5s.what is the puppy's speed?

    asked by victor
  82. economics

    f the US dollar depreciates dramatically relative to the Chinese yuan, what effect would this have on consumers and businesses in each country? When is a falling dollar good or bad for the US?

    asked by jessica alva
  83. Economics

    Which aspects of the Great Depression are echoed in the ongoing economic crisis that began in 2008? What is different about the two periods? Do they have similar theoretical explanations?

    asked by jessica alva
  84. c programming

    To see how the four steps of the software development procedure discussed in Section 1.7 can be applied in practice, you apply them to the following simple programming problem: The circumference, C, of a circle is given by the formula C = 2ðr, where ð is

    asked by fatih
  85. Math(Algebra)

    An arrow is shot vertically upward from the top of a cliff 80 feet tall, with an initial velocity of 64 ft/s, (the acceleration due to gravity is -16ft/sec). a. Write the quadratic equation representing this scenario when h is 0. b. Find the roots

    asked by Joshua
  86. Chemistry

    60.0 mL of 3.40 M sodium hydroxide is combined with 39.0 mL of 1.50 M magnesium chloride. What mass in grams of solid forms? (Hint: the total or overall reaction is most useful in doing calculations.) I got 485.1

    asked by Anonymous
  87. play

    if two child is using finger paints, they are engaging in what kind of play?

    asked by Anonymous
  88. Functions

    What is the inverse of h(x)= (1/4x^2)+x ?

    asked by lola
  89. physics

    Leroy, who has a mass of 90 , is skateboarding at 8.6 when he smacks into a brick wall and comes to a dead stop in 0.2 .find the force of impact

    asked by Anonymous
  90. Chemistry

    If 50.00mL of 1.10M NaOH is added to 25.00mL of 1.86M HCl, with both solutions originally at 24.70 degrees Celsius, what will be the final solution temperature? (Assume that no heat is lost to the surrounding air and that the solution produced in the

    asked by Tasnim
  91. Chemesitry!

    Sodium thiosulfate, Na2S2O3, is used as a fixer in photographic film developing. The amount of Na2S2O3 in a solution can be determined by a titration with iodine, I2, according to the equation: 2Na2S2O3(aq) + I2(aq) --> Na2S4O6 +2NaI(aq). Calculate the

    asked by Anonymous
  92. statistics

    According to the book Are you Normal?,40% of all US adults try to pad their auto insurance claims to cover their deductible. Your office has just received 128 in insurance claims to be processed in the next few days, what is the probability that fewer than

    asked by Lauren
  93. Math

    If you are in a hot-air balloon at a height of 100 meters, you can expect to see ____ km. Round your answer to the nearest kilometer and enter only the number.

    asked by Jazy
  94. Chemistry

    A 0.3120 g sample of a compound made up of aluminum and chlorine is dissolved in 150 mL H2O. When excess AgNO3 is added, 1.006 g of AgCl is precipitated. What is the number of moles Cl in the aluminum chloride sample?What is the number moles of aluminum in

    asked by Anonymous
  95. chemistry

    Would you expect a chemical change to be always accompanied by a physical change?Pls. Explain

    asked by Amanda
  96. Skeletal System

    what type of bone cell is very important in the healing of fractures? osteoclasts osteocytes osteoblasts osteosomas

    asked by randomchik
  97. math

    What does x equal when 7x+6= 5x+4

    asked by Cheyenne
  98. college math

    Classify the triangle as scalene isoceles or equlateral and as acute, right or obtuse

    asked by Mom
  99. chemistry

    When two solutions are mixed and a new color is observed, is this color change an indication that a chemical reaction has occurred? Explain. It is not possible to directly observe chemical bonds breaking and forming during a reaction, molecules and atoms

    asked by chemdummy
  100. Science

    How does the inner core differ from the outer core?

    asked by Tiki
  101. math

    A circular arc has measure 22ft and is intercepted by a central angle of 27 degrees . Find the radius of the circle.

    asked by mavis
  102. Science-Biology

    why do plants grow better under certain lighting conditions than others?

    asked by Lulu
  103. Business Math

    2. The interest on $6,000 at 6 percent compounded semiannually for 8 years is: (Use table in the handbook) (Points : 1)

    asked by Tanisha
  104. please help!

    I'm having trouble with this word problem. Two friends Jodi and Abe go horseback riding on the same trail in the same direction. Jodi's horse travels at 5 miles per hour while Abes horse travels at a slower pace. After 2 hours they are 2 miles apart. Find

    asked by kelly
  105. social(please help)

    Hi, I don't wont home made clay.we would like to use play-doh.how to use social study with play-doh.create a model of one of the following LANDFORMS OR BODIES OF WATER :PENINSULA,MESA OR PLATEAU,MONTAIN,VALLEY,VOLCANO,LAKE,RIVER,OR ISLAND

    asked by Lakshmi
  106. ap

    Very small mercury batteries have been made and used in a multitude of applications. Why have they been replaced by other kinds of batteries for most applications? 1. These batteries cannot generate enough current for any modern devices. 2. Mercury is

    asked by cheri
  107. ap

    A battery has two electrodes labeled anode and cathode. Electrons flow from the (anode, cathode) to the (anode, cathode) through the external circuit and (an oxidation, a reduc- tion) reaction occurs at the cathode. 1. anode; cathode; reduction 2. cathode;

    asked by cheri
  108. ap

    In a voltaic cell, electrons flow from the ? to the ? in the external circuit. 1. cathode; anode 2. products; reactants 3. anode; cathode 4. reactants; products

    asked by cheri
  109. ap

    Chlorine, bromine, and iodine are good 1. oxidizing agents. 2. reducing agents. 3. bases.

    asked by cheri
  110. ap

    For an electrochemical reduction process, electrons are 1. taken from solution species at the surface of the cathode. 2. added to solution species at the surface of the anode. 3. added to solution species at the surface of the cathode.

    asked by cheri
  111. ap

    What is a poor conductor of electricity? 1. mercury 2. molten NaCl 3. copper 4. potassium 5. sulfur

    asked by cheri
  112. Physics

    A harmonic wave is traveling along a rope. It is observed that the oscillator that gener- ates the wave completes 38.9 in 27.4 s. Also, a given maximum travels 432 cm along the rope in 10.6 s. What is the wavelength? Answer in units of cm.

    asked by AJ
  113. Physics

    The lowest A on a piano has a frequency of 27.5 Hz. Assume: The tension in the A piano wire (of length 0.51 m) is 305 N, and one-half wavelength occupies the wire. What is the mass of m the wire? Answer in units of kg.

    asked by AJ
  114. Physics

    Standing-wave vibrations are set up in a crystal goblet with four nodes and four antin- odes equally spaced around the 26.3 cm cir- cumference of its rim. If transverse waves move around the glass at 900 m/s, an opera singer would have to produce a high

    asked by AJ
  115. ap

    A saturated solution of which of the follow- ing substances in water would be the best conductor of electricity? 1. CH4 2. Hg2Cl2 3. HCl 4. NH3 5. CH3COOH

    asked by cheri
  116. ap

    Sodium, potassium, and rubidium are good 1. oxidizing agents. 2. reducing agents. 3. bases.

    asked by cheri
  117. Physics

    To demonstrate standing waves, one end of a string is attached to a tuning fork with frequency 120 Hz. The other end of the string passes over a pulley and is connected to a suspended mass M, as shown. The value of M is such that the standing wave pattern

    asked by AJ
  118. ap

    The reaction 2Na+ + 2Cl− ! 2Na + Cl2 is indicative of ? cell; the sign of the anode is ? ; and ? forms at the cathode. 1. an electrolytic; negative; Na+ 2. a voltaic; positive; Na 3. an electrolytic; positive; Na 4. an electrolytic; positive; Cl2 5. a

    asked by cheri
  119. Chemistry

    It asks:For each of the following atomic numbers, use the periodic table to write the formula (including the charge) for the simple ion that the element is most likely to form in ionic compounds. For example, they gave 56, and the answer is Ba(2+), but I

    asked by Kaleen P
  120. Physics

    The length of a string is 344 cm. The string is held fixed at each end. The string vibrates in two sections; i.e., the string has two antin- odes, and the string vibrates at 130 Hz. Find the wavelength. Answer in units of m. What is the fundamental

    asked by AJ
  121. Physics

    A length of organ pipe is closed at one end. If the speed of sound is 344 m/s, what length of pipe is needed to obtain a funda- mental frequency of 70 Hz? Answer in units of m.

    asked by AJ
  122. Physics

    A variable-length air column is placed just below a vibrating wire that is fixed at the both ends. The length of air column open at one end is gradually increased from zero until the first position of resonance is observed at 20 cm. The wire is 115.4 cm

    asked by AJ
  123. Math

    what is the future value of $8000 a year for 28 years at 7.5%

    asked by james
  124. science

    what is the control in the following experiment - which brand of popcorn has the least amount of un-popped kernels after 3 minutes?

    asked by Allison
  125. chemistry

    colorless vinegar added to purple cabbage juice turns pink What is the reason behind and why is it considered a chemical change?

    asked by chemdummy
  126. 7th grade math Ms.Sue please

    1. Which of these numbers can be classified as both real and irrational? 5.858585858 63.4 square root 21 square root 36 2. Which is both a real number and an integer? 23 1 over 4 square root 27 3.402538 3. Which of these numbers is classified as both real

    asked by Delilah
  127. science

    please tell me if you agree with the following: Which Brand of popcorn hs the least amount of unpooped kernels after 3 minutes. Brand 1 has 1 Brand 2 has 15 Brand 3 has 16 Brand 4 has 5 Brand 5 has 25 the answer is Brand 1 BUT is the: independent variable

    asked by lori
  128. Physics

    A person pushes a 19.5-kg shopping cart at a constant velocity for a distance of 35.6 m on a flat horizontal surface. She pushes in a direction 25.4 ° below the horizontal. A 53.1-N frictional force opposes the motion of the cart. (a) What is the

    asked by Anonymous
  129. math-algebra

    one pump can empty a pool in 5 days, wheras a second pump can emtpy pool in 7 days. how long will it take the two pumps, working together, to empty the pool?

    asked by amanda
  130. Physics

    A dockworker applies a constant horizontal force of 90.0Nto a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 12.0min a time of 5.20s.If the worker stops pushing after 5.20s,

    asked by Karina
  131. English ms. sue

    ms. sue yesterday i write story abt independence in third person well i have to write another one in first person and i want to write in nonhuman perspective, which animal I be? or could i be something other than creature, but not human?

    asked by Mohammad
  132. math

    forty member of a parent organazation are making candles to raise money. one member drops out and the rest have to make 3 more candles each to make up. each member makes the same number of candles. how many candles do they make altogether.

    asked by mili
  133. World History

    1.What is an example of economic force? 2. What is an example of political force? 3. What is an example of social force?

    asked by Anonymous
  134. Physics

    A turbine is spinning at 3600 rpm. Friction in the bearings is so low that it takes 15 min to coast to a stop. How many revolutions does the turbine make while stopping?

    asked by senko
  135. chemistry

    The following reation has the following standard thermodynamic parameters: delta H= -33.6 kJ/mol delta S= -59.8 J/(mol*K). C(g) + D(g) --> E(g) Calculate the temperature at which the reaction becomes nonspontaneous.

    asked by Brunette
  136. Physics

    A car starts from rest on a curve with a radius of 110m and accelerates at 1.2m/s^2. Through what angle will the car have traveled when the magnitude of its total acceleration is 2.1 m/s^2? Steps please.

    asked by senko
  137. Alg 2

    Today we learned how to solve systems of equations with 3 variables, however my teacher didn't go over how to do a problem where not every single equation in the system has the 3 variables. Can someone point me to a place that explains this? the kind of

    asked by john
  138. physics

    A small fish is dropped by a pelican that is rising steadily at 0.69 m/s. How far below the pelican is the fish after 2.4 s?

    asked by Leslie
  139. College Physics

    A ball of mass 620 g hangs from a spring whose stiffness is 195 newtons per meter. A string is attached to the ball and you are pulling the string to the right, so that the ball hangs motionless, as shown in the figure. In this situation the spring is

    asked by Anabel
  140. statistics

    A school adjustment inventory is administered to boys and girls of primary school.Find out weather two groups differ significantly from each other Number mean Std deviation Boys 100 32 10 girls 100 30 6

    asked by Bhagya
  141. time and stress management

    relaxation is a state of (a)low arousal (b)high arousal (c)increased blood pressure (d)rapid thought processes my answer is a to analyze exactly what to do with your time,you need to (a)write down everything that you do in a time inventory (b)videotape

    asked by susue
  142. Precalculus

    There are 4 rectangular corrals of identical dimensions along the back wall of an existing barn using 200 ft of fencing. The diagram has 4 rectangular corrals attached together but fencing is not needed on the back wall of the barn. The barn is above the 4

    asked by Cole
  143. Chemistry

    What is the temperature of 0.45mol of gas at a pressure of 1.0at and a volume of 10.1L ? if anyone can tell me what i need to do to solve this problem it would be helpful

    asked by Brittney
  144. time and stress management

    progessive mmuscle relaxation is a technique used for (a)falling asleep (B)becoming aware of tension in muscles (C)prepping surgery patients (d)raising blood pressure my answer is b to achieve a low state of arousal,you need to (a)control breathing,thought

    asked by susue
  145. time and stress management

    am example of a long-term goal is (a)getting your hair done at your favorite salon (b)traveling to europe (c)finishing a term paper (d)reading a biography my answer is b which of the following is a direct benifit of practicing relaxation techniques (a)less

    asked by susue
  146. Physics URGENT!!!

    A sled loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 40.0o above the horizontal. The sledge moves a distance of 16.0 m on a horizontal surface. The coefficient of kinetic friction between the sledge

    asked by Megan
  147. Math

    . Identify each expression as a numerical expression or a variable expression. For a variable expression, name the variable. d + 43 - 9

    asked by Von
  148. math

    On a winter day the temperature at 6 a.m. was -9° F. At 2 p.m. it was 25° F. By how many degrees did the temperature change from morning to afternoon?

    asked by julissa
  149. chemistry

    calculate the standard molar entropy change for the combustion of methane gas using S naught values from standard thermodynamic tables. Assume that liquid water is one of the products.

    asked by Bru
  150. Fifth grade English

    What is the plural form of staff? Not sure if it should be staff or staffs. Thank you for helping. Britt

    asked by Britt
  151. elementery

    HI, MY dughter is studying 3rd grade.how to prepare Tsat test in math,english.can u tell me any links

    asked by Lakshmi
  152. chemistry

    at high temperatures, ammonia decomposes to N2 and H2. 2 NH3(g)--> N2 (g) + 3H2(g) Delta H for the reaction is positive and delta S is positive. Estimate the temperature at which this reaction becomes spontaneous

    asked by Brunette
  153. Sociology

    Compare and contrast the theories of Daniel Levinson , Irene Frieze, and Esther Sales concerning adult development.

    asked by Kristina
  154. science

    determine the period of motion when a ball dropped from a height of 4.40m makes a perfectly elastic collsion with the ground without any mechanical energy lost

    asked by Anonymous
  155. science

    Hi, create one of the following weather instrument:we would like anemometer.please tell me which one is the best

    asked by Lakshmi
  156. criminal justice

    the amount of force used in self -defense of another must, under the circumstances that exist, be: a: reasonable, B: correct C: identical D: less than the force being used by the aggressor I think it's D

    asked by candy
  157. Physics

    In a head-on collision, a car stops in 0.14{\rm s} from a speed of 24{\rm m}/{\rm s} . The driver has a mass of 67{\rm kg} , and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fraction of a

    asked by Amanda
  158. chemistry

    I have been knocking around this question for what seems to be an eternity. We have not gotten that far in this class so this is for extra credit. I have managed to get myself confused about something that should be easy. 25mLof tartaric acid solution is

    asked by Stephen
  159. Physics

    Two packing crates of masses 7.57 kg and 4.51 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 4.51 kg crate lies on a smooth incline of angle 40.0°.

    asked by Anonymous
  160. Biology

    A detective gathers cell evidence at a crime scene. The victim is a 37 year old man, killed by a blow to the head. Closer examination of the evidence leads the detective to conclude that firewoods was used. Which of the following kinds of evidence BEST

    asked by Mary Beth
  161. Physics

    A horse canters away from its trainer in a straight line, moving 130 m away in 13.0 s. It then turns abruptly and gallops halfway back in 5.4 s. a) Calculate its average speed. (b) Calculate its average velocity for the entire trip, using "away from the

    asked by royaa
  162. Physics HELP!

    A 85.0 kg base runner begins his slide into second base when he is moving at a speed of 2.10 m/s. The coefficient of friction between his clothes and Earth is 0.570. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical

    asked by Samm
  163. chemistry

    C4 H10 O or diethyl ether or with a formula of CH3CH2OCH2CH3 its stick structure is H H H H ! ! ! ! .. H-C-C-C-C- O-H ! ! ! ! .. H H H H I used the this ! sign as a sign for bond. pls help me to determine the geometry for each central atom in this

    asked by chemdummy
  164. that link is not working

    HI, MY dughter is studying 3rd grade.how to prepare Tsat test in math,english.can u tell me .can u send me links.Tennese state

    asked by Lakshmi
  165. Kinematics

    A 55.0kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is .300. What horizontal force must be applied to the box for it to start sliding along the surface? Please write out the solution. I am getting

    asked by Jaybird
  166. physics

    A spring has a length of 60cm when it unstretched. A load of 10N increases its length to 64 cm and a load of 20N increases its length to 68cm a)what extension is produced by the 20N load? b) What length would the spring have if a load of 15N were added to

    asked by Maria