Most popular questions and responses by Barry
  1. chemistry

    ethanol is a common laboratory solvent and has a density of 0.789 g/ml what is the mass in grams of 139 mL of ethanol

    asked on September 3, 2012
  2. math

    A paper cone has a base diameter of 8cm and a height of 3cm a. Calculate the volume of the cone in term of pie b. Calculate the curve surface area of the cone

    asked on October 9, 2016
  3. Physics

    A submerged scuba diver looks up towards the calm water of a lake and notes that the Sun appears to be 20 from the vertical. The diver's friend, standing on the shore of the lake, is also looking at the Sun. At what angle from the vertical does the diver's

    asked on March 17, 2012
  4. Physics

    A large fish tank is filled with water (of refractive index 1.33). One side of the tank is made of a parallel-sided piece of glass. A ray of light strikes the glass from the outside at an angle of incidence of 48. Estimate the angle through which this ray

    asked on March 17, 2012
  5. physics

    A car crashes into a wall at 20 m/s and is brought to rest in 0.1 s. Calculate the average force exerted on a 75 kg test dummy by the seat belt. Force*time= change in momentum mv solve for force.

    asked on September 27, 2006
  6. English

    What is the rhyme scheme, meter, and stanza form for the poem "The Lamb" by William Blake? The Lamb Little Lamb, who made thee? Dost thou know who made thee? Gave thee life, and bid thee feed By the stream and o'er the mead; Gave thee clothing of delight,

    asked on September 14, 2008
  7. Math

    Okay, really I just need to know if this is going to be division, multiplication, subtraction or addition. Damon's town received 12.3 inches of rain during a 24-hour period. First, estimate the amount of rain that fell per hour. Then, find the exact amount

    asked on January 10, 2019
  8. physics

    A skipper on a boat notices wave crests passing his anchor chain every 9 s. He estimates the distance between wave crests to be 15 m. He also correctly estimates the speed of the waves. What is this speed? Wavelenght* frequency= wave speed remember that

    asked on November 5, 2006
  9. Physics

    Laser light with a wavelength = 665 illuminates a pair of slits at normal incidence. What slit separation will produce first-order maxima (i.e. m=1) at angles of 8 from the incident (or straight through) direction? Remember, 1 nm = m. Express your answer

    asked on March 17, 2012
  10. 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 on October 5, 2012
  11. Accounting

    Horse Country Living publishes a monthly magazine for which a 12-month subscription costs $30. All subscriptions require payment of the full $30 in advance. On August 1, 2008, the balance in the Subscriptions Received in Advance account was $40,500. During

    asked on March 31, 2009
  12. Physics

    A prism, made of glass of refractive index 1.50, has two plane faces at an angle 33 to each other. A ray of light enters the glass from one side perpendicular to that face and emerges through the other. Part A: As the ray enters the glass, what is its

    asked on March 17, 2012
  13. physics

    A bat flying in a cave emits a sound and receives its echo 0.5 s later. How far away is the cave wall? I answered this below. If you cant find it, search on bat flying in the search window above.

    asked on November 5, 2006
  14. Physics

    At time t = 0, a projectile is launched from ground level. At t = 2.00 s, it is displaced d = 53 m horizontally and h = 54 m vertically above the launch point. What are the (a) horizontal and (b) vertical components of the initial velocity of the

    asked on January 6, 2015
  15. Physics

    A brick dropped from a roof hits the ground 4.14 seconds later. How high (in m) was the roof?

    asked on October 4, 2012
  16. Physics

    Bob has a helicopter and from the launch pad, he flies the following path. First. he travels from the launch pad a distance of 20km at a heading of 30 degrees East of South (240 degrees). Then he flies 45 km heading 65 degrees West of North (155 degrees).

    asked on September 23, 2018
  17. math

    Assume the brakes of an automobile produce a constant deceleration of k ft/sec^2. Determine what k must be to bring an automobile traveling 60 mph to a rest in a distance of 100 ft from the point where breaks are applied? With the same k, how far would a

    asked on April 15, 2015
  18. science

    If a car has a constant acceleration of 4 m/s², starting from rest, how far has it travelled by the time it reaches the speed of 40 m/s?

    asked on March 28, 2015
  19. english

    what are the pros and cons of joining "netville 2" a computer company that came to your neighbourhood. We will be happy to critique your thinking on this. thanks im having trouble thinking of cons. The only thing i have for cons are: hidden fees and

    asked on April 21, 2007
  20. math derivatives

    An architect is designing a rectangular building in which the front wall costs twice as much per linear metre as the other 3 walls. The building is to cover 1350 m2. What dimensions must it have so that the costs of the walls is a minimum? write a formula

    asked on June 6, 2015
  21. business

    1. What kind of risk analysis would you use when purchasing a house or a personal vehicle? Describe this analysis. How does this process assist you in making your decision? Do you believe the process is efficient and achieves the results you desire? How

    asked on July 1, 2011
  22. Physics121

    What are the three longest wavelengths for standing sound waves in a 124-cm-long tube that is (a) open at both ends and (b) open at one end, closed at the other?

    asked on November 7, 2009
  23. Physics

    A ball was thrown straight up at 26.2 m/s then caught at the same place it was released. How many seconds was it in the air?

    asked on October 4, 2012
  24. business

    2. Think of a risk response plan that you have in your personal life, such as automobile, homeowner’s, or renter’s insurance. What were some of the decision criteria that influenced your decision about how much coverage to purchase? How does your

    asked on July 1, 2011
  25. grammar

    trying to Capitalize the proper nouns in the sentence

    asked on December 8, 2009
  26. math

    an airplane flies at 150 mph and heads N 30 degrees east. A 40 mph wind blows it in the direction S 30 degrees E. What is the planes resultant velocity

    asked on May 25, 2016
  27. math-urgent please help

    Newton’s Law of Cooling states that the temperature of a heated object decreases exponentially over time toward the temperature of the surrounding medium. The temperature u of a heated object at a given time t can be modeled by the following function:

    asked on December 4, 2012
  28. math- algebra

    If the principal P = $900, the rate r = 4 1/2, and time t = 1 year, find the following: What is the amount of interest? What is the future value?

    asked on July 31, 2011
  29. math

    for people each bought two bottles of vermont maple syrup. each person plans to share their bottle with three friends. how much does each person get?

    asked on February 18, 2010
  30. Statistics

    I have completed 6 questions but after 2 hours still cannot do these 4 questions. Please help 1) Jane is playing a game of Monopoly, if she throws six on her next turn she will land on community chest. If she throws eight she will land on Mayfair with a

    asked on June 28, 2017
  31. math

    I don't understand factoring. One of my homework questions asks for that. The question is "The area of a rectangular garden is given by the trinomial x to the 2nd power plus x -42. What are the possible dimensions of the rectangle? Use factoring.

    asked on July 30, 2015
  32. spanish

    How would I complete this question? hago mi tarea en la_______

    asked on August 31, 2010
  33. grammar

    The dock is on Fish Lane. CAPITALIZE the proper nouns in the sentence.

    asked on December 8, 2009
  34. garmma

    She and mom got to the Dock late.

    asked on December 8, 2009
  35. Physics / Astronomy

    Here is my question: Consider the bending of light by the gravitation of the Sun as described by Newtonian physics. Light of frequency f passes at a distance d from the center of the Sun, which has a mass M. Show that the bending angle of the light is

    asked on May 28, 2008
  36. algebra

    Which of the equations is graphed below? Question 1 options: y = x2 + 6x + 10 y = x2 + 3x + 2 y = x2 - 6x + 10 y = -x2 + 6x - 10

    asked on October 2, 2018
  37. Physics

    There is an outcropping of ice with a large drop to a slope below. A 100kg piece of ice breaks off with a 60kg person on top of it, and falls o the slope below. The piece of ice slides down the slope to the bottom and onto a horizontal portion. It slides

    asked on July 25, 2016
  38. math

    find the exact value cos (-5 pi/ 12)

    asked on January 22, 2015
  39. Math

    A manufacturer of soft-drinks advertises that their orange soda as "naturally flavored," although it contains only 5% orange juice. A new federal regulation stipulates that to be called "natural" a drink must contain at least 10% fruit juice. How much pure

    asked on January 31, 2013
  40. 1st grade

    if yo have three words friend, things & might which word has the long i sound and which word can you get by adding a sound to in? a tin,b hid c find

    asked on March 29, 2010
  41. Matrix application

    Part of the road is to be on a parabolic curve given by a function of the form y = ax^2 + bx + c where x and y are local co-ordinates. The road alignment must pass through the following 3 points:- x = 150m y = 190.650m x = 300m y = 611.450m x = 450m y =

    asked on December 5, 2016
  42. Derivatives Instantaneous rate of change

    The electric field E at a distance r from a point field is E =K/r^2 where k is a constant. Find an expression for the instantaneous rate of change of the electric field with respect to r.

    asked on June 3, 2015
  43. Math


    asked on June 1, 2013
  44. math

    I have a diagram of an occupied building space within a larger building represented by 49 equal squares but no linear measures for the sides. The space is 120,000 sq ft. how can i estimate the lengths and widths of the floor space with just this

    asked on December 13, 2012
  45. math

    you have an unfortunate brush with the law and you are required to spend some time in the penitentiary. (Naturally you have brought your math 30 course notes with you for a bit of light bedtime reading. You also hope to enlighten your fellow inmates with

    asked on December 4, 2012
  46. literature

    "The best in this kind are but shadows" is

    asked on December 1, 2009
  47. human life


    asked on January 17, 2009
  48. Maths

    Please help. I completed 1-6 but these 4 are hard; the wording confusing. 1) Jane is playing a game of Monopoly, if she throws six on her next turn she will land on community chest. If she throws eight she will land on Mayfair with a hotel (owned by

    asked on June 29, 2017
  49. calculas

    Please help don't understand how to solve it. 3xy-6x+2y^2 dx/dt=-6 x=2 y=-3 thank you

    asked on June 28, 2016
  50. Science

    Calculate the resultant of force of 200 N due west and a force of 90 N at 60 degree NW

    asked on November 28, 2015
  51. Math natural logarithms

    The efficiency e of a gasoline engine as a function of its compression ratio r is given by e =1− r^(1−γ) , where γ is a constant. Find γ for e = 0.55 and r = 7.5

    asked on May 16, 2015
  52. math

    how is GCF and LCM different? im in 4th grade and i tried to understand but my mum said shes not sure so please i need help

    asked on January 22, 2015
  53. Chemestry

    how to balence an equasion

    asked on June 1, 2014
  54. biology

    I have to do a lab report on the effect of metal ions on enzyme activity One of the questions asked the sources of error and one asked the methods used I got stuck, can you pls help

    asked on April 16, 2014
  55. Math

    A pot contains 6 liters of brine at a concentration of 120g/l. How many liters of the water should be boiled off so that concentration of the brine is 200g/l.

    asked on January 31, 2013
  56. algebra


    asked on November 5, 2012
  57. math

    simplify this expression (3xy)^2(2x^2z)^3

    asked on November 5, 2012
  58. math

    is 6.31 equal to 0.631

    asked on March 26, 2012
  59. math

    how to solve the set of system equations 6x - y - 2 = 0 dan 3x - 2y + 5 = 0

    asked on March 4, 2012
  60. Physics

    How much pressure is exerted by a 5000 pound moving vehicle vehicle (hehicle is 6' x 12')?

    asked on November 6, 2010
  61. Grammar

    Which sounds better my brother knows more about technology than me or I

    asked on March 19, 2010
  62. Finance

    I don't have a formula for this question: Purchasing Power= 1280.08 (Nov.1/07) Purchasing Power= 1000.00 (Nov.1/97) What is the annual rate of inflation? I think it can be solved 1280.08/1000 -1 but Im not sure??

    asked on November 7, 2008
  1. history

    The answers for Global Politics and Economics are 1: B 2: D 3: C 4: B So Camera and Harley's answers are correct. I don't know why Martha's would have had different answers, but for anyone in INCA, these are right.

    posted on April 29, 2019
  2. science

    Fav food is meat loaf

    posted on April 8, 2019
  3. Latin (GA Connections Academy)

    Okay, I know I'm late, but I just wanted to do this anyways. Here's what I got: 1. Things were done in the wars of by the Greeks, in the Romanist. 2. She was taught by the sailors Greek sword fight. 3. From bright to the queen of the wild beast of the poet

    posted on January 10, 2019
  4. Math

    Thank you!

    posted on January 10, 2019
  5. reding

    I suspect the questioner is asking whether Farmer Brown farms, or farmer Brown farms. See the difference? If the farmer Mr Brown is generally known as Farmer Brown, the word farmer has been elevated to a nominative category unique to Mr Brown and thus

    posted on September 25, 2018

    Am be

    posted on February 12, 2018

    Scientifically if the moon spun on the same rotational period as earth we would typically see the different parts of the moon

    posted on February 12, 2018
  8. Algebra


    posted on January 6, 2017
  9. Chemistry

    One ppm is one millionth of a gram or in simpler terms, 10^6.

    posted on December 6, 2016
  10. calculas

    Assume x and y are functions of t, Evaluate dy/dt, 3xy-6x+2y^2 dx/dt=-6 x=2 y=-3 dy/dt

    posted on June 28, 2016
  11. math


    posted on April 29, 2016
  12. math

    thanks the weebsite is fun

    posted on January 22, 2015
  13. Eng B

    Beyond tone a poet's attitude toward his or her subject reveals to us a poem's? A. theme B. subject C. diction D. structure I think it's A. Literature-Help me Ms. Sue - Ms. Sue, Thursday, July 3, 2014 at 8:35pm I agree. this person must have been really

    posted on October 7, 2014
  14. math

    Dear Roberta, the answer should be D recall the identity (a-b)^2 = a^2 - 2ab + b^2 Hope it helps Wishing you the best of luck barry

    posted on July 13, 2014
  15. math

    Dear Roberta, Let the number of people be y 100 + 20y = 25 + 25 y 75 = 5y y = 15 So the answer should be B Hope it helps! Wishing you the best of luck, Barry

    posted on July 13, 2014
  16. math

    Dear Roberta, the answer is D (1/2)(10t) =50,000 (10t) =50,000 /(1/2) 10t= 100000 t = 10000 Hope it helps! Wishing you the best of luck Barry

    posted on July 13, 2014
  17. Algebra

    Dear sharon, 840 x 0.02 = 16.8(decimal number) 16(integer) Hope it helps! wishing you the best of luck Barry

    posted on July 13, 2014
  18. Math

    Hi! the question is ¡Ô(4x+1) + ¡Ô(x+1) = 2 Square both sides (¡Ô(4x+1) + ¡Ô(x+1))^2 = 2^2 still remember the identity (a+b)^2 = a^2 + 2ab + b^2 let ¡Ô(4x+1) be a ¡Ô(x+1) be b as a^2 + 2ab + b^2 we can derived the equation 4x+1 +

    posted on July 12, 2014
  19. Algebra

    Dear sharon, the first equation y = -7x - 9 slope= -7 y-intercept= -9 the second equation -3y = 21x + 7 y = -7x -(7/3) slope= -7 y-intercept= -(7/3) To determine whether the two lines are perpendicular slope of equation 1 X slope of equation 2 must be -1.

    posted on July 11, 2014
  20. math

    Dear Kyle, Sub (a,3) into the equation 5x + y = 8 5a + 3 = 8 5a = 5 a = 1 Hope it helps! wishing you the best of luck, Barry

    posted on July 10, 2014
  21. math

    Dear Kyle, the equation of circle let (h,k) be the center of the circle let the radius be r then the equation of circle will be (x-h)^2 + (y-k)^2 = r^2 so according to your equation of circle given the center point= (-5,7)

    posted on July 10, 2014
  22. chem/math

    Dear Ann, 3.88 = 3.74 + log (x/0.1) 0.14 = log (x/0.1) 10^(0.14) = x/0.1 x = 1.38 x 0.1 x= 0.138 These are the calculation steps. I suppose the answer is 0.138 instead of 0.137. Ann,do you mind showing your calculation steps so I can know what is your

    posted on July 8, 2014
  23. algebra

    Dear Marcus, The answer is 1/(2x^9y^3) since [-10x13y^12]^0 = 1 as there is a rule And the denominator cannot be further simply Hope it helps!

    posted on July 6, 2014
  24. Math

    Dear High, The amount that you are going to get =1000 x (1+(0.08/4))^(4x7) =1741.024 For the interest that you are going to get= 1741.024-1000 = 741.024

    posted on July 5, 2014
  25. chemistry

    Dear shashank, The chemical formula of FeSo4.7H2O = 55.8+ 32.1+ 16x4 + 7x18 = 277.9 The percentage of water of crystallization= = (7x18)/ 277.9 x 100% = 45.34%

    posted on June 30, 2014
  26. math

    I= PRT Simple interest = 280 Nigerian naira X 2.5 X 0.03 = 21 Nigerian naira

    posted on June 22, 2014
  27. Chemistry

    Dear akhmal, mol of sucrose used= 1/(12x12 + 22 + 11X16) = 2.92x10^-3 as 1 mole of sucrose will produce 12 moles of Co2 mol of CO2 produced= (2.92x10^-3)X 12 = 0.035 grams of CO2 produced = 0.035 X (12+32) = 1.54g as 1 mole of sucrose will react with 12

    posted on June 22, 2014
  28. chem

    Dear marie, I guess there is no AlO3 existing So do you actually mean aluminium oxide (Al2O3) The balanced equation is 3OH- + AL3+ -------> Al(OH)3 mol of aluminium oxide needed= 98.1 as 1 mole of aluminium oxide required 3 moles of sodium hydroxide to

    posted on June 22, 2014
  29. rates

    The amount of petrol required for each Km = 18/90 =0.2L The amount of petrol needed for 200km =0.2x200 =40L

    posted on June 21, 2014
  30. maths

    The largest share is 650x(6/13) = 300

    posted on June 21, 2014
  31. Chemistry

    Dear Sally, as I have replied you before, I am not sure whether you have checked HCL(aq) + NAOH(aq)---- NACL(s)+ H20(l) Number of moles in the NAOH(aq)= 40/(23+16+1) =1 as 1 mole of HCL will react with 1 mole of the Naoh solution number of mole of HCL

    posted on June 19, 2014
  32. Chemistry

    Dear Sally, Here is the balanced equation HCL(aq) + NAOH(aq)---- NACL(s)+ H20(l) Number of moles in the NAOH(aq)= 40/(23+16+1) =1 as 1 mole of HCL will react with 1 mole of the Naoh solution number of mole of HCL required= 1 Still remember that there is a

    posted on June 19, 2014
  33. chemistry

    Dear hifsa still remember there is a formula Molarity= mol/dm cube so ........ 0.5= mole/ (1.25/1000) number of mole= 6.25x10^-4

    posted on June 19, 2014
  34. Chemisty

    Dear Veronica, number of moles of HNO3 used= 0.602x(23.4/1000) = 0.014 number of mol of Cu used= 0.014/8x3 =5.28255x10^-3 mass of the Cu involved in the reaction = 5.28255x10^-3 x 63.5 = 0.33544g %by mass of Cu = 0.33544/0.411 x 100% = 81.6%

    posted on June 17, 2014
  35. Chemistry

    Dear Brett, molar mass of the HNO3= 1+14+16x3 =63 number of moles of the HNO3 produced in the reaction = 7.5/63 = 0.119 According to the equation provided 3 moles of NO2 will produce 2 moles of HNO3 Thus,number of moles of NO2 required= 0.119/2x3 = 0.179

    posted on June 17, 2014
  36. Chemistry

    Dear Abdulhafiz the no of mole of the 50ml of ph3 solution= (1x10^-3)x (50/1000) = 5x10^-5 the number of moles in the 50ml of ph5 solution= (1x10^-5) x (50/1000) = 5x10^-7 Total no of moles in the solution = 5x10^-5 + 5x10^-7 = 5.05x10^-5 The molarity of

    posted on June 17, 2014
  37. MATH ✿╣Check╠✿

    3/ (6+5+4+3) = 1/6

    posted on May 4, 2014
  38. add maths

    Dear Mandy, Here is the solution log2 0.45 = log2 (9/20) = log2 9 - log2 20 = 2log2 3 - log2 (4x5) = 2h- (log2 4 + log2 5) = 2h-(2+k) = 2h-2-k Hope this helps

    posted on May 3, 2014