Most popular questions and responses by Ali
  1. chem

    ethanol melts at -114c the enthalpy of fusion 5.02 kj/mol the specific heats of solid and liquid ethanol are 0.97 and 2.3 respectively . how much heat is needed to convert 25 g of solid etanol ay -135c to liquid ethanol at -50c?

    asked on January 31, 2017
  2. college chemistry

    From your mass of MgNH4PO4.6H2O collected, calculate your value a) for the mass of "P2O5" in the initial mass of fertilizer analyzed b) the % "P2O5" in the fertilizer. Compare this with the manufacturer's specification. Just want to know how i would go

    asked on September 23, 2015
  3. English

    what conclusion can you draw about jason from the dialouge in line 10 in a surprising point of view A. Jason procrastinate doing his schoolwork. B. Jason and Ms. Smith have. good relationship C. Jason is one of the best students. D.Jason is embarrassed to

    asked on December 13, 2018
  4. Calculus

    Two ships leave the same port at noon. Ship A sails north at 22 mph, and ship B sails east at 12 mph. How fast is the distance between them changing at 1 p.m.? (Round your answer to one decimal place.)

    asked on October 10, 2012
  5. math

    Tina uses a $50 gift certificate to buy a pair of pajamas for $17.97, a necklace for $25.49, and 3 pairs of socks that each cost the same amount. Tina has to pay $0.33 because the gift certificate does not cover the total cost of all the items. How much

    asked on January 19, 2016
  6. Chemistry

    Solutions of potassium carbonate, copper(II) chloride, and lead(II) nitrate are each added to a beaker. Will any compound(s) precipitate from solution? Write a balanced net ionic equation for any precipitation reaction that occurs. I have gotten this so

    asked on October 22, 2013
  7. pyhsics

    A cannonball is shot (from ground level) with an initial horizontal velocity of 36.0 m/s and an initial vertical velocity of 21.0 m/s. 1) What is the initial speed of the cannonball? 2) What is the initial angle θ of the cannonball with respect to the

    asked on September 8, 2012
  8. Algebra

    Bob needs to mix 2 cups of orange juice concentrate with 3.5 cups of water to make orange juice. Bob has 6 cups of concentrate. How much orange juice can he make? Please help answer thx

    asked on October 28, 2014
  9. Scince

    suggest and explain what happens to the movement of sugar in winter when a tree has no leaves

    asked on April 1, 2018
  10. Algebra

    The ratio of North American butterflies to South American butterflies is 5:3. The ratio to South American butterflies to European butterflies is 3:2. There are 30 North American butterflies at the butterfly park. Question A. How many South American

    asked on October 28, 2014
  11. trig

    A space shuttle 200 miles above the earth is orbiting the. Earth once every 6 hours. how far does the shuttle travel in one hour? Note the radius of earth about 4000 miles.

    asked on September 17, 2011
  12. college chemistry

    From your mass of MgNH4PO4.6H2O collected, calculate your value a) for the mass of "P2O5" in the initial mass of fertilizer analyzed b) the % "P2O5" in the fertilizer. Compare this with the manufacturer's specification. Just want to know how i would go

    asked on September 23, 2015
  13. Calculus Help

    A high-speed bullet train accelerates and decelerates at the rate of 4 ft/s2. Its maximum cruising speed is 90 mi/h. (Round your answers to three decimal places.) (a) What is the maximum distance the train can travel if it accelerates from rest until it

    asked on April 19, 2014
  14. Math

    The Mall: My sister likes to go shopping. Yesterday she borrowed a wad of money from Mom and went to the mall. She began her excursion by spending $18 on a new CD. Then she spent half her remaining money on a new dress. Then she spent $11 on lunch. Then

    asked on March 3, 2017
  15. Math

    A rectangular prism is completely packed with 180 cubes of edge length fraction 1 over 3 inch, without any gap or overlap. Which of the following describes the volume of this rectangular prism? 19 unit cubes and 9 smaller cubes of volume fraction 1 over 27

    asked on January 20, 2016
  16. Physics

    A particle has a charge of +1.5 µC and moves from point A to point B, a distance of 0.18 m. The particle experiences a constant electric force, and its motion is along the line of action of the force. The difference between the particle's electric

    asked on January 12, 2011
  17. physics

    a block of mass 0.1kg is attached to spring and placed on a horizontal frictionless table .the spring is stretched 20cm when a force of 5n is applied.calculate the spring constant

    asked on April 22, 2017
  18. Calculus

    The base of a solid in the first quadrant of the xy plane is a right triangle bounded by the coordinate axes and the line x + y = 2. Cross sections of the solid perpendicular to the base are squares. What is the volume, in cubic units, of the solid?

    asked on July 28, 2015
  19. 4th grade math

    A park guide plans the swan boat rides for 40 people. Each boat can carry 6 people at a time. What is the best way to interpret the remainder of 40/6 in this situation so that everyone gets a ride? How do I show the work?

    asked on February 1, 2015
  20. math

    find a commission on a $1,250 sale with a commission rate of 5%. $62.50 $6.25 $75.00 $125.00 HELP PLSSS

    asked on February 8, 2017
  21. chemistry

    Determine the quantity (g) of pure CaCl2 in 7.5 g of CaCl2*9H2O

    asked on November 16, 2015
  22. 4th grade math fraction

    Ashley bought 4 packages of juice boxes. There are 6 juice boxes in each package. She gave 2 juice boxes to each of 3 friends. How many juice boxes does Ashley have left?

    asked on February 2, 2015
  23. Science

    A drop of oil of volume 10^10m spread out on water to make a circular film of radius 10^1m. What is the thickness of the film

    asked on October 26, 2017
  24. Geometry

    When constructing inscribed polygons and parallel lines, how are the steps different? A. A protractor is used to take measurements B. Four right angles are created. C. A compass is used to copy an angle. D. There are no similarities. I think it's C? What

    asked on October 13, 2017
  25. Calculus Please help!

    If 7000 dollars is invested in a bank account at an interest rate of 7 per cent per year. A) Find the amount in the bank after 6 years if interest is compounded annually? B) Find the amount in the bank after 6 years if interest is compounded quaterly? C)

    asked on February 21, 2014
  26. chemistry

    how many moles of fe are present in 30g of rust?

    asked on August 21, 2016
  27. Algebra

    A collector has 120 movie posters and 100 band posters. She wants to sell 24 movie posters but still have her poster collection maintain the same ratio of 120:100. If she sells 24 movie posters, how many band posters should she sell? Explain thx

    asked on October 28, 2014
  28. Math

    How is using a conversion factor different than using proportions to convert measurement units? Explain which is easier and why.

    asked on January 14, 2016

    a.) which of the following reactions should have the larger emf under standard conditions & why? CuSO4 (aq) + Pb (s) goes to PbSO4 (s) + Cu (s); Cu(NO3)2 (aq) + Pb(s) goes to Pb(NO3)2(aq) + Cu(s) b.) Calculate delta G for the reaction.

    asked on April 19, 2014
  30. English

    what conclusion can you draw about jason from the dialouge in line 10 in a surprising point of view A. Jason procrastinate doing his schoolwork. B. Jason and Ms. Smith have. good relationship C. Jason is one of the best students. D.Jason is embarrassed to

    asked on December 13, 2018
  31. Social Studies

    Which is Islam’s most sacred text? A. the Quran B. the Sunnah C. the Hadith D. the Sharia What do Muslims do on a hajj? A. They fast during the day for a month. B. They give wealth to the poor and needy. C. They pray five times each day. D. They travel

    asked on December 6, 2018
  32. Fact file

    give one place where vascular bundles are close together

    asked on April 10, 2018
  33. Calculus [Implicit Differentiation]

    If √x+√y=10 and y(16)=36, find y'(16) by implicit differentiation. If somebody could please help me by explaining how to solve this problem ! Thank you (:

    asked on November 17, 2012
  34. ed tech HELP PLS

    why is it important to take responsibility for your online publications? a. What you post can hurt or slander others*** b. people will know who the author is c. your parents need to see what you post d. what you post is important for your grade

    asked on February 16, 2017
  35. Law and ethics in allied health

    ive been trying to figure this question out for 20 minutes.. if you could help me that would be great. - Dennis, a new medical assistant at Dr. Hernandez's office, notices that Beth has been waiting over an hour to get an allergy shot. Dennis has never

    asked on January 13, 2011
  36. math

    Find a polynomial, which, when added to the polynomial 5x2–3x–9, is equivalent to: 0

    asked on December 21, 2016
  37. trig

    Verify the identity sin 3x cos 3x = 1/2 sin 6x can you show step by step please

    asked on April 19, 2010
  38. physics

    You are on an airplane traveling 30° south of due west at 130.0 m/s with respect to the air. The air is moving with a speed 31.0 m/s with respect to the ground due north. 1) What is the speed of the plane with respect to the ground? 2) What is the heading

    asked on September 10, 2012
  39. derivative (fg)'

    This problem tests calculating new functions from old ones: From the table below calculate the quantities asked for (fg)'(–2) x 1 –17 0 –2 f(x) 3 –4335 0 0 g(x) 1 –10097 1 –17 f(x) 7 799 0 4 g(x) 3 1767 –1 27 (fg)'(–2) = ??? ty

    asked on February 22, 2014
  40. chemistry

    Calculate the amount of silver deposited at cathod when 5 ampere of current is passed for 50 minutes through a solution of AgNO3

    asked on March 12, 2017
  41. Reading

    Solar Eclipse Watch Event Downtown Metro Airport, August 21, 9 a.m. Sponsored by the State Astronomical Society On August 21, our area will experience a total solar eclipse at 1:08 p.m. The Downtown Metro Airport will redirect all flights to the State

    asked on January 6, 2018
  42. science

    Steel expands 1 part in 100 000 for each 1°C increase in temperature. If the 1.5km main span of steel suspension bridge had no expansion joints, how much longer would it be for a temperature increase of 20°C?

    asked on October 2, 2011
  43. mathe

    Show that a right-circular cylinder of greatest volume that can be inscribed in a right-circular cone that has a volume that is 4/9 the volume of the cone.

    asked on July 12, 2014
  44. statistics

    It is claimed that an automobile is driven on the average more than 20,000 kilometers per year. Random sample of 10 automobile owners are asked to keep a record of the kilometers they travel. If the sample mean and standard deviation of automobile driven

    asked on June 3, 2011
  45. math

    When Kaitlin divided a fraction by 1/2,the result was a mixed number.Was the original fraction less than or greater than 1/2? Explain your reasoning

    asked on October 7, 2014
  46. college

    A blue ball is thrown upward with an initial speed of 19.8 m/s, from a height of 0.5 meters above the ground. 2.4 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 7.9 m/s from a height of 22.5 meters above the

    asked on September 3, 2012
  47. chemistry

    apply write an expression for the quantity 506,000 cm in which it is clear that all the zeros are significant.

    asked on October 4, 2009
  48. Math

    Suppose you spin a spinner that is equally likely to land on any one of the numbers from 1 to 8. Which event has the same probability as P(not 2 or 3)?

    asked on May 21, 2014
  49. Math

    1. Sally was able to eat 5/8 of her lunch. John ate 75% of his lunch. Who are more of their lunch? a. John b. Sally c. They both ate the same number amount d. The amount cannot be calculated

    asked on October 4, 2017
  50. 4th grade math

    There are 112 seats in the school auditorium. There are 7 seats in each row. There are 70 people seated, filling up full rows of seats. How many rows are empty? We added and got 189 then divided by 3. But it doesn't look correct. How do we show the work?

    asked on February 1, 2015
  51. math

    Solve this problem plz... A shopkeeper buys some eggs at 15 cent each.6 of them are broken.while rest are sold at 20 cent each if he makes a profit of $4.8.find eggs he bought?

    asked on January 20, 2016
  52. Chemistry

    Describe how you would obtain pure crystals of Sodium chloride from a muxture of solid sodium chloride and solid zinc carbonate Step1 Step 2 Step 3 1. Add HCl to react with the carbonate. The products are zinc chloride, CO2, and water. The CO2 leaves as a

    asked on April 24, 2007
  53. Fact file

    give one place where vascular bundles are spread out

    asked on April 10, 2018
  54. physics

    a hockey puck rebounds from a board. the puck is in contact with the board for 2.5 ms. dertermine the acceleration of the puck over the time interval. V(i) = 26 m/ angle of 22 degrees. V(f) = 21 m/ angle of 22 degrees. a=?

    asked on January 27, 2011
  55. chemistry help~~~~ Please!!!

    how should the ph of a 0.1 m solution of nac2h3o2 compared with that of a 0.1 m solution of kc2h3o2?

    asked on April 10, 2014
  56. physics

    Batman, whose mass is 119 kg, is holding on to the free end of a 14.6 m rope, the other end of which is fixed to a tree limb above. He is able to get the rope in motion as only Batman knows how, eventually getting it to swing enough that he can reach a

    asked on February 25, 2011
  57. US History

    For this portfolio project, you will conduct research and examine documents that show the thoughts of both immigrants and people who opposed immigration. You will use the research and primary documents to write an essay in which you answer the question:

    asked on April 24, 2018
  58. Chemistry

    Identification of an unknown powdered metal by reaction with HCl: Why does the pH of the HCl solution initially increase very slowly when an unknown metal is first added to the acid solution, but gradually increase at a faster rate as the reaction proceeds

    asked on October 6, 2013
  59. Physics

    Two charged smoke particles exert a force of 4.2x10^-2 N on each other. What will be the force if they are moved so they are only one eighth as far apart? F= 4.2x10^-2 N K= 8.99x10^9 e= 1.6x10^-19 Do I solve for r even though they're asking me to find the

    asked on May 14, 2010
  60. Langusge Arts

    Can you find 3 metaphors and 10 alliterations in this poem? THE Witch 1.She comes back night, in fearsome flight, 2. In garments black as pitch, 3.The queen of doom upon her broom, 4.The wild and wicked witch, 5.A cackling crone with brittle bones 6.And

    asked on April 14, 2010
  61. Math

    TO BE HONEST I DON'T REALLY KNOW SO I WAS WONDERING IF YOU GUYS HELP ME FIND THE ANSWER THANKYOU Ursula has fraction 1 over 2 cup of butter. She uses fraction 1 over 4 cup of butter to make a batch of brownies. Part A: How many batches of brownies can

    asked on January 20, 2016
  62. Mathematics

    The points A,B,C and D are consecutive vertices of a regular polygons with 20 sides.Calculate angles (a) ABC (b) ACD (c) ABD

    asked on March 2, 2019
  63. French

    What is a good site for learning how to speek french for free?

    asked on September 20, 2007
  64. Chemistry

    What do Na2(CO3)+ Zn(NO3)2 form?

    asked on May 18, 2008
  65. Grammar

    Select the word or phrase that makes the sentence grammatically correct. 1. A tuberculin skin test should be read within 24 hrs. ____ administration. a. Of b. Since c. As d. From 2. The student ______ for the final exam. a. Didn’t studied b. Was studying

    asked on October 4, 2017
  66. Chemistry

    Why is the solubility of butane 6.1 mg / 100 g water, yet hexane is immiscible in water?

    asked on November 6, 2013
  67. physics

    A red ball is thrown down with an initial speed of 1.2 m/s from a height of 25.0 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 22.9 m/s, from a height of 0.8 meters above the

    asked on September 3, 2012
  68. Science

    Which statement describes data that is negatively skewed? A. The majority of the data is to the left of the mean. B. The majority of the data is to the right of the mean. C. The majority of the data is in the center with the mean. D. The majority of the

    asked on December 13, 2018
  69. science

    Calculate the molarity of each solution. a) 1.0 mol KCl in 750 mL of solution b) 0.50 mol MgCl2 in 1.5 L of solution

    asked on March 24, 2011
  70. 4th grade math

    Ursula bought 9 dozen gauze pads for the health office. The gauze pads were divided equally into 4 boxes. How many gauze pads are in each box?

    asked on February 2, 2015
  71. Chemistry

    In the following experiment, a coffee-cup calorimeter containing 100 \rm mL of \rm H_2O is used. The initial temperature of the calorimeter is 23.0 \rm ^{\circ}C. If 9.80 g of \rm CaCl_2 is added to the calorimeter, what will be the final temperature of

    asked on June 17, 2012
  72. phy

    a landscape architect is planning an artificial waterfall in a city park. water flowing at 1.70 m/s will leave the end of a horizontal channel at the top of a vertical wall h =2.35 m high . and from there it will fall into a pool ( Fig . P4.18) (a) will

    asked on May 31, 2017
  73. Physics

    A lighted candle is placed 38 cm in front of a diverging lens. The light passes through the diverging lens and on to a converging lens of focal length 10 cm that is 5 cm from the diverging lens. The final image is real, inverted, and 19 cm beyond the

    asked on August 3, 2015
  74. Physics

    Sam, whose mass is 72.0 kg, takes off down a 51.0 m high, 11.0^\circ slope on his jet-powered skis. The skis have a thrust of 180 N. Sam's speed at the bottom is 43.0 {\rm m/s}. What is the coefficient of kinetic friction of his skis on snow?

    asked on October 24, 2011
  75. Statistics

    As in the previous lecture clip, consider the same example of two rolls of a 4-sided die, with all 16 outcomes equally likely. As before, let X be the result of the first roll and Y be the result of the second roll. Define W=XY . Find the numerical values

    asked on June 17, 2019
  76. Physics 100

    A bat flying in a cave emits a sound and receives its echo 0.25 s later. How far away is the cave wall?

    asked on April 25, 2010
  77. Chemistry

    20.When black gunpowder explodes, potassium nitrate, carbon, and sulfur react with each other to form nitrogen, carbon dioxide, and potassium sulfide. If thee original mixture contains 50.0 g of potassium nitrate, what is the total volume of the gases

    asked on May 15, 2008
  78. Math

    The mean monthly wages of 7experienced and 5 inexperienced workers is 1000 .If the mean monthly wage of the 5 inexperiencedworkers is 846 find the mean monthly wage of 7experienced workers

    asked on November 27, 2018
  79. physics

    Standing on a balcony, you throw your keys to a friend standing on the ground below. 1.2 seconds after you release the keys, they have an instantaneous velocity of 15.4 m/s, directed 60° below the horizontal. What initial velocity did you give them?

    asked on October 18, 2011
  80. Calculus!

    What is the velocity of an object dropped from a height of 350 m when it hits the ground?

    asked on September 21, 2007
  81. Calculus

    The region in the first quadrant bounded by the x-axis, the line x = ln(π), and the curve y = sin(ex) is rotated about the x-axis. What is the volume of the generated solid? Got 2.8 and .79 very confused

    asked on August 4, 2015
  82. math

    The perimeter of a rectangular pool is 84 feet. The width of the pool is half the length. What are the measurements of the rectangular pool?

    asked on March 20, 2012
  83. marketing opportunity cost

    Maurice receives $100 as a birthday gift. In deciding how to spend the money, he narrows his options down to four choices: Option A, Option B, Option C, and Option D. Each option costs $100. Finally he decides on Option B. The opportunity cost of this

    asked on July 7, 2010
  84. Physics

    A car with its passengers have a total mass of 4200kg .the car is travelling along a horizontal road when it moves ,it experiences a forward driving force of magnitude F newtons and a constant resistance force(opposite to driving force)of 850N a)what is

    asked on November 19, 2016
  85. Physics Please help!

    If it requires 5.5J of work to stretch a particular spring by 2.3cm from its equilibrium length, how much more work will be required to stretch it an additional 4.5cm ? Express your answer using two significant figures. W=_____ J?

    asked on February 25, 2014
  86. Physics

    A bicycle and rider travel along a road. Which of the following statements is true? Neither the bicycle nor the rider undergoes a translation. Only the bicycle undergoes a translation. The bicycle wheels rotate and translate the entire bike and the rider.

    asked on January 15, 2015
  87. LA

    Johnny struggles to overcome his pride and impatience and develop into a humble, generous young man. 5. Which type of conflict does the statement describe? (1 point) A)character vs. self B)character vs. nature C)character vs. society D)character vs.

    asked on January 8, 2015
  88. Geometry

    If ABCD = QRST, m∠A = x-10 and m∠Q = 2x-30, what is the m∠A

    asked on July 6, 2017
  89. College physics

    A student has built a 20-cm-long pinhole camera for a science fair project. She wants to photograph the Washington Monument, which is 167 m (550 ft) tall, and to have the image on the film be 5.0 cm high.

    asked on July 30, 2010
  90. Math

    1) for any three consecutive numbers, what can you say about odd numbers and even numbers? Explain. 2 A)Mirari conjectures that, for any three consecutive numbers, one number would be divisible by 3. Do you think Mirari is correct? Explain. 2 B) Gia claims

    asked on October 9, 2017
  91. Statistics

    Let X be a random variable that takes integer values, with PMF pX(x) . Let Y be another integer-valued random variable and let y be a number. a) Is pX(y) a random variable or a number? b) Is pX(Y) a random variable or a number?

    asked on June 17, 2019
  92. 4th grade math

    Amanda and her four sisters divided 1,021 stickers equally. About how many stickers would each girl receive? How do I show my work?

    asked on February 1, 2015
  93. Math

    The graph of f(x)=sin(x) is transformed into a new function, g(x), by stretching it vertically by a factor of 4 and shifting it 3 units to the right. What is the equation of the new function g(x)?

    asked on May 6, 2019
  94. Physics

    A ball is allowed to fall freely from certain heightn. What distance it covers in 1st second?

    asked on January 11, 2017
  95. Calculus Please help!

    The altitude of a triangle is increasing at a rate of 2500 centimeters/minute while the area of the triangle is increasing at a rate of 3500 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 7000 centimeters

    asked on February 28, 2014
  96. Chemistry

    Solid AgNo3 is added slowly to solution of 0.001M Cl,Br,and I a) at what concentration of Ag will AgI precipitating? at what concentration of Ag will AgCl precipitating? at what concentration of Ag will AgBr precipitating? b) calculate the percent % of I

    asked on October 18, 2016
  97. 4th grade math

    Jake wants to distribute 543 marbles equally among 7 of his friends. In what place is the first digit of the quotient?

    asked on February 1, 2015
  98. physics

    a 4.5kw electric motor is 90% much energy it use in 20 seconds.

    asked on December 1, 2013

    Why was the early West considered a "crossroads of culture"? A: Mexico originally owned the land, so the cultures of Americans, Mexicans, and Native Americans were all present in the West. B: The California Gold Rush brought in people from all over the

    asked on January 30, 2017
  100. physics

    A stone is launched straight up by a slingshot. Its initial speed is 20.1 m/s and the stone is 1.30 m above the ground when launched. Assume g = 9.80 m/s2. (a) How high above the ground does the stone rise? (b) How much time elapses before the stone hits

    asked on January 24, 2012


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