Most popular questions and responses by Lala
  1. calculus

    a boat leaves a dock at 2:00 pm and travels due south at a speed of 20 km/h. Another boat has been heading due east at 15 km/h and reaches the same dock at 3:00 pm. at what time were the two boats closest together

    asked on November 14, 2011
  2. math

    what should you call a man with a clamp

    asked on March 28, 2011
  3. Chemistry

    A scuba diver’s tank contains 0.29 kg of O2 compressed into a volume of 2.3L. A)calculate the gas pressure inside the tank at 9 Celsius. B) what volume would this oxygen occupy at 26 Celsius and 0.95atm? Answer is a)91atm B) 2.3 x 10^2 L Trying to find

    asked on January 18, 2018
  4. math

    why did they try to build a house on orgo's head?

    asked on February 17, 2011
  5. Calculus

    A fence is 1.5m high and is 1m from a wall. A ladder must start from the ground, touch the top of the fence, and rest somewhere on the wall. Calculate the minimun lenght of the ladder. I drew a diagram and i ended up with a right angle triangle. i made the

    asked on April 10, 2010
  6. English

    In the Night The Bed Fell, what is the father's reaction to the scene he discovers when he opens the attic door? He is ready to chase a burglar He's worried someone's been hurt He wants to know what's happened He's glad that everyone's all right My answer

    asked on September 19, 2016
  7. English (Langue Arts)

    What does the following quote from “The cask of Amontillado “ reveal about what Montresor wants his servants to do ? "I had told them that I should not return until the morning and has given them explicit orders not to stir from the house. These orders

    asked on May 20, 2016
  8. Romeo and Juliet (Check answers pplz hurry)

    Could you please check these answers from Act 1 (Review it's only 5 questions) 1.What warning does the Prince issue to the Capulets and Montagues? Answer: The Prince warns to the Capulet's and Montague's is if anyone fights they will be put to death. 2.

    asked on March 12, 2009
  9. Chem

    a 4.369g sample of metal is placed in a flask. water is added to the flask and the total volume in the flask is read to be 126.4ml. the mass of the water, flask, and metal is 268.5g. if the mass of the flask is 139.3g and the density of water is 1.000g/ml,

    asked on December 5, 2012
  10. Chemistry

    Gallium melts just above room temperature and is liquid over a very wide temperature range (30-2204 °C), which means it would be a suitable fluid for a high-temperature barometer. Given its density, daa = 6.0 g/cm, what would be the height of the column

    asked on January 17, 2018
  11. Matsci

    If the absolute pressure at the bottom of the ocean is 120 kPa, how deep is the water at this point

    asked on December 5, 2015
  12. Social studies

    How was transportation standardized under the Qin? A roads were the same width B Carriages were the same height C Everyone paid the same road tax**** D Axles of carriages were the same length This is the Unification of China quiz Can someone check my

    asked on December 6, 2018
  13. Statistics

    1. A local community college determines the probability that a student will reenroll for a second year is 0.91. A representative surveys 100 random first year students and asks them if they will be enrolling for the next year. What is the probability that

    asked on January 15, 2019
  14. physics

    A car with a 65cm diameter wheel travels 3.0km. How many revolutions does the wheel make in this distance?

    asked on November 14, 2017
  15. ap history

    when did american economic institutions began to be shaped in a capitalist framework? A.during the colonial period B.during the federalist era C.during the jacksonian era D.during the civil war E.during the late 1890s

    asked on September 26, 2010
  16. chemistry

    how to prepare and calculate 10%,20% and 30% of phosphoric acid from the concentrated? Meaning that if 10% = 10%phosporic acid+90% of water. let say i want to prepare in 250ml volume.

    asked on January 29, 2013
  17. Financial Mgmt.

    Nachman Industries just paid a dividend of D0 = $1.75. Analysts expect the company's dividend to grow by 30% this year, by 10% in Year 2, and at a constant rate of 5% in Year 3 and thereafter. The required return on this low-risk stock is 9.00%. What is

    asked on March 5, 2013
  18. Maths

    A box with no top is to be built by taking a 6'' - by - 10'' sheet of cardboard and cutting x - in. squares out of each corner and folding up the sides. Find the value of x that maximizes the volume of the box.

    asked on September 19, 2010
  19. Science

    The rider of a ferris wheel moves at a rate of 0.18 m/s2. If the rider is 5.0 m from the center of the ferris wheel, What is his/her Velocity? Can't figure out if the RADIUS and RATE are the same and Which one is the radius/rate?

    asked on June 23, 2015
  20. physics

    A kid fires water horizontally from a squirt gun held 1.6 above the ground. It hits another kid 2.1 away square in the back, at a point 0.91 above the ground.

    asked on February 10, 2012
  21. physics

    a cyclist travel a distance of 4km from P to Q then moves the distance of 3km at right angle to PQ. find its resultant displacement graphically?

    asked on July 11, 2011
  22. physicss

    The oil drain plug on a car's engine has just been tighten to a torque of 25m*N. a) if a 0.15m long wrench is used to change the oil, what is the minimum force needed to loosen the plug? b) due to limited workspace, it will be necessary to crawl under the

    asked on December 5, 2017
  23. Finance

    Suppose you borrowed $15,000 at a rate of 9% and must repay it in 5 equal installments at the end of each of the next 5 years. What is the outstanding balance of the loan at the end of second year?

    asked on January 13, 2017
  24. English- The scarlet Letter

    what rhetorical device does hawthrone use to reveal hester prynne's past? What do we learn about her?

    asked on October 16, 2011
  25. math

    What were the headlines after a mad scientist trained two eggs to attack a candy store with sharp sticks?

    asked on January 12, 2011
  26. chemistry

    A thimbleful of water at 100 deg C has a higher temp than a swimming pool full of water at 20 deg C, but the pool has more thermal energy than the thimble. Explain why this is possbile?

    asked on April 26, 2010
  27. Science

    A scientist is studying a new chemical he hopes will prevent insects from eating raspberry bushes. he sprays the chemical on a raspberry bush and places it with an unsprayed blackberry bush and some insects in a sealed room. He observes insects eating the

    asked on September 27, 2018
  28. World History

    How did the Europeans establish and maintain their trading empires with Asia? ? idk help

    asked on January 9, 2011
  29. biology

    in japan, native honeybees have evolved an effective defense strategy against giant Japanese hornets. imported European honeybees, however, are unable to defend themselves. explain this in terms of coevolution?

    asked on March 29, 2010
  30. physics

    help please?? A bocce ball with a diameter of 6.00 cm rolls without slipping on a level lawn. It has an initial angular speed of 2.35 rad/s and comes to rest after 2.50 m. Assuming constant deceleration, determine (a) the magnitude of its angular

    asked on December 1, 2017
  31. mathematical modeling

    Person A opens an IRA at age 25, contributes $2000 per year for 10 years, but makes no additional contributes thereafter. Person B waits untill age 35 to open an IRA and contributes $2000 per year for 30 years. There is no initial investment in either

    asked on August 13, 2011
  32. Social studies

    What was the purpose of the Great Wall? A to separate warring states B to keep out nomads to the north*** C to standardize Chinese roads D to make trade and transportation easier (*** my answer) Please NO answers please just check my answer or send study

    asked on December 6, 2018
  33. chemistry

    Calculate the pH of 0,3g calcium hydroxide dissolved in water to give 500ml solution.

    asked on October 26, 2014
  34. algebra

    Write the number 2.4 in the form , using integers, to show that it is a rational number

    asked on February 5, 2018
  35. Physics

    A 1500 kg automobile travels at a speed of 105 km/h along a straight concrete highway. Faced with an emergency situation, the driver jams on the brakes, and the car skids to a stop. (a) What will be the car's stopping distance for dry pavement (µ = 0.85)?

    asked on October 4, 2017
  36. Calculus

    A certain radioactive material decays exponetially. The percent, P, of the material left after t years is given by P(t)= 100(1.2)^-t a)Determine the half life of the substance

    asked on April 13, 2010
  37. Science

    the energy an object has due to it's motion is called a what?

    asked on March 18, 2015
  38. physics

    a large chunk of ice with mass 15 kg falls from a roof 8 m above the ground . find the kinetic energy of the ice when it reaches the ground

    asked on February 6, 2012
  39. calculus

    Two roads intersect at an angle of 48º. A car and truck collide at the intersection, and then leave the scene of the accident. The car travels at 100 km h down one road, while the truck goes 80 km h down the other road. Fifteen minutes after the accident,

    asked on April 15, 2010
  40. Physics

    the cartesian coordinates of a point on a circle are (1.5m, 2.0m). what are the point;s polar coordinates (r, degree) of this point?

    asked on November 7, 2017
  41. biology

    in a relationship that is an example of commensalism, would the species that is neither helped nor harmed evolve in response to the other species?

    asked on March 29, 2010
  42. physical science

    a sled and rider with a combined weight 60kg are at rest on the top of a hill 12m high. what is their total energy at the top of the hill?

    asked on September 26, 2011
  43. math

    20. A scale drawing of a town park has a scale of 5 in : 100 ft. What is the actual length of each foot in the drawing? (1 point)

    asked on December 2, 2011
  44. Physics

    A 45kg sled is coasting with constant velocity at 3.0m/s over a patch of smooth and level ice. It enters a very rough section of ice that is 11m long in which the force of friction is 15N. With what speed will the sled emerge from the rough ice?

    asked on January 5, 2012
  45. calculus

    Three ships are at points P, Q, and R such that PQ=2km PR=7 km, and

    asked on April 15, 2010
  46. Social studies

    Does anyone have the answers to the quiz I need to check my answers Thanks it would help a lot

    asked on December 6, 2018
  47. physics

    A clump of soft clay is thrown horizontally from 30.63 m above the ground with a speed of 30.0 m/s. Where is the clay after 3.8 s? Assume it sticks in place when it hits the ground

    asked on January 27, 2011
  48. physics

    When bunting, a baseball player uses the bat to change both the speed and direction of the baseball. (b) The baseball has a mass of 0.11 kg; its speeds before and after the bunt are 16 m/s and 12 m/s, respectively; and the bunt lasts 0.023 s. What is the

    asked on October 17, 2017
  49. Social Studies

    1. Which river helped Rome grow and expand? A. Tigris

    asked on March 29, 2017
  50. chem

    calculate the number of moles in 0.00655 g of antimony

    asked on March 16, 2009
  51. Physics

    the cartesian coordinates of a point on a circle are (1.5m, 2.0m). what are the point;s polar coordinates (r, degree) of this point?

    asked on November 7, 2017
  52. World History

    What factors contributed to Islam's spread to south and southeast Asia?

    asked on November 8, 2010
  53. chem

    Calculate the number of kJ released for the reaction shown below, if you begin with 52 grams of fluorine (F2), and the ΔH = -542 kJ. H2(g) + F2(g) → 2 HF(g)

    asked on September 29, 2015
  54. Physics

    Suppose a crate of mass 2.8 kg is placed on the plank in the figure below at a distance 5.1 m from the left end. Find the forces exerted by the two supports on the plank. (The mass of the plank is 12.0 kg.) Left Support N Right Support N The plank set on

    asked on March 6, 2011
  55. math

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

    asked on October 26, 2010

    reaction KMnO4+ EDTA(ethylenediaminetetraacetic acid) + MnSO4(s)---> MnCl3 (Violet/Rose solutions) note: Mn is being reduced. a) What is the catalyst in this reaction above? b)What is the role of EDTA in the reaction above

    asked on February 14, 2010
  57. chem

    1) how many molecules are present in 1.5 moles of NaCl? 2) how many atoms of chlorine are in 19.0 grams of MgCl2?

    asked on May 29, 2014
  58. Math

    1.) In the following problem, write the first five of the terms of the arithmetic sequence. a1=16.5 d=0.25 2.) Find a the correct formula for the an for the arithmetic sequence. a1=-1 d=5

    asked on April 16, 2015
  59. Finance

    EMAR expects to receive $2,000 per year for 10 years and $3,500 per year for the next 10 years. What is the present value of this 20-year cash flow? Use an 7% discount rate.

    asked on January 13, 2017
  60. calc 3

    1. Evaluate the given integral by making an appropriate change of variables, where R is the region in the first quadrant bounded by the ellipse 36x^2+25y^2=1. L= double integral R (4sin(144x^2+100y^2) dA. 2. Use the given transformation to evaluate the

    asked on November 4, 2014
  61. algebra

    A car travels down the highway at speeds between 50 miles per hour and 65 miles per hour. If the car travels for 4 hours, write an expression that represents the distance, d, the car has travelled.

    asked on November 1, 2013
  62. Physics

    when driving at night at a speed of 80 km/hr, a deer suddenly appeared and frozen in your head light. The distance between your car and the deer was 45 meters at the moment you start to break your car as hard as possible in order to avoid the accident

    asked on September 1, 2012
  63. Calculus

    4. Find the dimensions of the largest isosceles triangle having a perimeter of 18 cm. Answer ( all sides 6 cm) i really need help with coming up with the equation of the function before solving its derivative and making it equal zero so far i know 2x+y=18

    asked on March 9, 2010
  64. chemistry

    a galvanic cell: A copper electrode is placed in a Cu(NO3)2 electrolyte. An iron electrode is placed in a Fe(NO3)3 electrolyte. a) What will happen to the voltage if sodium sulfide solution was added to the copper solution(I found that CuS(solid

    asked on February 21, 2010
  65. algebra

    A motorboat traveling a distance of 225 miles in 5 hours while traveling with the current. Against the current, the same trip took 9 hours. Find the rate of the boat in calm water and the rate of the current. rate of boat___ mph rate of current___ mph

    asked on November 27, 2014
  66. Science

    16g of bone displaced a volume of 8mL of water.what is the density of the bone?

    asked on August 24, 2011
  67. Romeo and Juliet Help (24 hours and no response)

    I posted questions yesterday and it's on the next page. Could you please check them and get back with me thanks.

    asked on March 13, 2009
  68. Math

    Find the exact value: cos(pi/16)cos(3pi/16)-sin(pi/16)sin(3pi/16)

    asked on January 29, 2015
  69. Physics

    An electric motor is used to pull a 125 kg box across a floor using a long cable. the tension in the cable is 350N and the box accelerates at 1.2m/s^2[forward] for 5.0s. The cable breaks and the box slows down and stops. How far does the box travel from

    asked on October 29, 2012
  70. Physics

    An electric motor is used to pull a 125 kg box across a floor using a long cable. the tension in the cable is 350N and the box accelerates at 1.2m/s^2[forward] for 5.0s. The cable breaks and the box slows down and stops. How far does the box travel from

    asked on October 29, 2012
  71. chemistry

    Testtube B: Has a solution of KMnO4 + NaOH+ NaHSO3----> K2MnO4 (green coloured-solution)+H2O+Na2SO4 If too much HSO3^1- was added to this solution above, what would be the resulting colour and why

    asked on February 14, 2010
  72. physics

    A car with a 65cm diameter wheel travels 3.0km. How many revolutions does the wheel make in this distance?

    asked on November 14, 2017
  73. Economic

    Suppose a firm has a constant marginal cost of$10 the current price of the product is $25, and at that price, it is estimated that the price elasticity of demand is -3.0. Is the firm charging the optimal price for the product? Demonstrate how you know.

    asked on June 19, 2014
  74. World History

    How did religion and trade connect Africa to a larger world; with what results?

    asked on November 8, 2010
  75. physics

    A car with a 65cm diameter wheel travels 3.0km. How many revolutions does the wheel make in this distance?

    asked on November 14, 2017
  76. math

    ABC is a sector of a circle with radius R cm and centered at C. The arc DE lies on a circle also centered at C.If the arc DE divides the sector ABC into two regions of equal area. Find the length of the interval CD in terms of R.

    asked on October 27, 2017
  77. Chemistry

    What is the unit cell of calcium sulfide? anti-fluorite cesium cholride diamond fluorite graphite rutile sodium chloride zinc blende

    asked on May 2, 2011
  78. Social Studies 6 B

    1. The Saraswati River was a twin to which other river? A. Ganges. B. Tigris. C. Himalaya. D. Indus. 2. Glacial runoff and ________ provide the water for the large rivers of India. A. underground wells. B. melting snow. C. rain. D. steam. 3. Saraswati

    asked on January 26, 2017
  79. Physics

    A lightning bug flies at a velocity of 0.25 m/s due east toward another lightning bug seen off in the distance. A light easterly breeze on the bug at a velocity of 0.25 m/s. What is the resultant velocity of the lightning bug? I drew the .25 east but would

    asked on September 20, 2011
  80. edcation

    When a person categorizes someone else as belonging to a certain group based on assumptions, this is called

    asked on July 6, 2018
  81. English

    What does this quote mean? “Stars got tangled in her hair whenever she played in the sky.”

    asked on January 12, 2014
  82. Math

    A spherical balloon is being inflated. Estimate the rate at which its surface area is changing with respect to the radius when the radius measures 20 cm.

    asked on September 22, 2013
  83. college physics

    Two cars of equal mass are traveling as shown in the figure below just before undergoing a collision. Before the collision, one of the cars has a speed of 19 m/s along +x, and the other has a speed of 31 m/s along +y. The cars lock bumpers and then slide

    asked on February 24, 2011
  84. English

    I'm writing a Precis of a book and it asks to to put the literary period and country I tried to look but I still don't really understand. Thanks

    asked on January 5, 2011
  85. chemistry

    If a mole of hydrogen gas (H2) contains 6.02 x 10^23 molecules, how many molecules are there in 10.0 moles of hydrogen gas? Answer 60.20 x 10^23 molecules 6.0 x 10^23 molecules 6.02 x 10^20 molecules 6.02 x 10^24 molecules None of these is correct. would

    asked on September 28, 2010
  86. chemistry

    defie le chatelier's principle and the role equilibrium plays in the reduction of stress

    asked on January 22, 2010
  87. chemistry

    Write the complete balanced molecular, ionic,and net ionic equations for the reaction of nickle II chloride + sodium phosphate. Which product,if any, is a precipitate?

    asked on December 3, 2009
  88. math

    the plan of a shopping complex is drawn to a scale of 1:400. A supermarket on the plan occupies an area of 0.25m square, calculate its actual area in hectares

    asked on October 21, 2017
  89. Math help

    A small recording studio that produce its own records is able to press 100 records a day for a profit of $3.60 per record. If a more expensive process is used, production can be increased, but the profit per record diminishes by 2 cents for each additional

    asked on January 12, 2016
  90. Statistics, Math

    For 30 randomly selected Rolling Stones concerts, the mean gross earnings is 2.37 million dollars. Assuming a population standard deviation gross earnings of 0.52 million dollars, obtain a 99% confidence interval for the mean gross earnings of all Rolling

    asked on December 1, 2015
  91. integrated science

    with all other factors equal, if you double the balanced force on an abject of a given mass the acceleration will be?

    asked on September 20, 2015
  92. Math sequences

    Determine the smallest interger n such that 1+(4/5)+(4/5)^2+...+(4/5)^n>4.9 Please explain ti me about thisquestion. I can'tunderstand it.

    asked on August 10, 2015
  93. college algebra

    The rate at which water evaporates from a certain reservoir depends on the air temperature. The table below shows the number of acre-feet (af) of water per day that evaporate from the reservoir for various temperatures in degrees Fahrenheit. Temperature,

    asked on October 22, 2014
  94. Physics

    two hundred fifty grams of iron is heated from 27 degree Celsius to 300 degree Celsius . how much ice can be melted and raised to a temperature of 27 degree Celsius by hot iron?

    asked on November 17, 2013
  95. statistics

    test the claim that less than 30% of the students in class own a car at the 0.10 significance level.

    asked on December 5, 2012
  96. Physics

    how can the equilibrant of two or more concurrent forces be found

    asked on October 2, 2011
  97. US History

    Why do you think freedom and independence were so important to the colonists?

    asked on November 19, 2010
  98. English

    What is an essay-style question, and how would I write one about a book I read? I don't have to answer the question

    asked on November 2, 2010
  99. maths

    A car completes a trip in 20 minutes. for the first half of the trip the speed of the car was 100km/h and the speed for the second half of the trip was 90km/h. How far did the car travel (in km) if the distance for the first part is the same as the second

    asked on April 14, 2016
  100. chem

    When saccharin is added to pure water, the freezing point of the resulting solution drops to -5.0C, Calculate the freezing point depression of the aqueous saccharin solution. Note: freezing point of pure water is O.0C... Stuck thanks so much!

    asked on January 16, 2013


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