Popular questions and responses by Abraham
  1. Science

    A block and tackle having a velocity ratio of 5 is used to raise a load of 400N through a distance of 10m. If the workdone against friction is 100J. Calculate 1. Efficiency 2. The effort applied

    asked on July 22, 2020
  2. English

    As a senior prefect of your school,write a speech you would give to fresh students telling them,at least, three things that can make their stay in the school successful.

    asked on June 4, 2019
  3. Chemistry

    Calculate the mass of NaOH needed to prepare 100ml of 0.20molar solution. B. Calculate the mass of solid KHP needed to react completely with 25ml of a 0.20m NaOH solution. C. Calculate the molar amount of solid KHP used to neutralize the NaOH solution.

    asked on January 7, 2020
  4. Math

    Solve this equation p square-10p-24=0

    asked on November 3, 2019
  5. Physics

    A rod extending between x = 0 and x = 17.0 cm has uniform cross-sectional area A = 7.60 cm 2 . It is made from a continuously changing alloy of metals so that along its length its density changes steadily from 2.00 g/cm 3 to 18.7 g/cm 3 .(a) Identify the

    asked on September 26, 2012
  6. Chemistry

    Nh3+Cuo=N2+Cu+H2O, 18.1g of nh3 and 90.4g of CuO made to react. (a). Determine the limiting reagent. (b). Which reactant is in excess? (c). Calculate the mass of Cu that forms. (d). Calculate the volume in liter of n2 that form at STP.

    asked on January 24, 2020
  7. Science

    A uniform rod 1.8m long and of mass 10kg rest horizontally on support at its ends. If a weight of mass 3kg is attached at a point 1.2m from one end, find the reactions from the support

    asked on June 8, 2020
  8. algebra

    On Monday, 12 students were absent, which is 8% of all the students in the class. How many students are in the class? How would I set this problem up?

    asked on May 11, 2020
  9. physics

    A bullet of mass0.01kg is fired with a velocity of 200m/s in to a sack of sand of mass 9.99kg which is swinging from rope .At the moment the bullet hits, the sack has a velocity of 0.2m/s. Workout the velocity of bullet and sand just after the bullet hits

    asked on January 10, 2020
  10. pre calculus

    janet worked on a garden shaped like a triangle with a base that is 5 m less than twice the height. If the area of the garden is 90 m^2, how long is the base and the height?

    asked on November 27, 2012
  11. Physics

    Given the displacement vectors A = (7.00 - 1.00 + 3.00 ) m and B = (6.00 + 5.00 - 3.00 ) m, find the magnitudes of the following vectors and express each in terms of its rectangular components. (a) C = A - B (b) D = 3A + B

    asked on September 26, 2012
  12. chemistry

    give enthalpy profile diagrams to illustrate endothermic and exothermic reactions. include an explanation of cocepts such as enthalpy change, activation energy and catalysts.explain how the process of bond breakage and formation determine the enthalpy

    asked on February 2, 2011
  13. math

    using rounding or compatible numbers,which numbers would you choose to estimate the exact product of 25 times 25.

    asked on January 21, 2011
  14. Biology

    If water were not a polar molecule and could not form hydrogen bonds, how would this change the structure and density of ice? Why would change? How would this affect the organisms living in lakes and ponds? 1. It would be heavier than water and sink. 2. If

    asked on November 14, 2006
  15. Science

    The titration of 25.00ml of 0.1000m hypochlorous acid (3.5x10^-8) with 0.1500m NaOH. (a). What is the pH before any acid is added (b). What is the PH when 25.00ml of NaOH has been added?

    asked on January 4, 2020
  16. Physics

    A boy can throw a ball a maximum horizontal distance of R on a level field. How far can he throw the same ball vertically upward? Assume that his muscles give the ball the same speed in each case.

    asked on December 12, 2019
  17. Civics

    How can good leaders protect the interest of their followers

    asked on May 15, 2019
  18. History of the Americas

    1. Do you think that the Radical Republicans made the right choices after the Civil War? Why or why not? 2. In what ways did the Reconstruction fail? 3. What does the struggle between the legislative and executive branch mean to you?

    asked on August 26, 2018
  19. Algebra

    Mr. Jones brought a use car for $2400 and sold it for $2700. What was the percent of profit for Mr. Jones in selling the car?

    asked on November 14, 2017
  20. math

    i have 20kg of wood.i brun 65% of it and keep the rest,how much do i use for bruning.

    asked on June 11, 2017
  21. chemistry

    What is the ∆G for the following reaction under standard conditions (T = 298 K) for the formation of NH4NO3(s)?

    asked on December 12, 2016
  22. maths

    how many of the integers from 1 to 200 contains the digit 1 at least twice?

    asked on May 26, 2016
  23. maths

    a number is chosen at random from the numbers:1 to 20. Find the probability that the number chosen is a multiple of 2 and a multiple of 5.

    asked on May 26, 2016
  24. Arithmetic progession

    The third term of an A.P is 10times more than the second term. Find the sum of the eight and fifteen term of the A.P if the seventh term is seven times the first term

    asked on August 13, 2015
  25. Economic Math

    Suppose the supply and demand for milk is described by the following equations: Qd=600-100P, Qs = -150+150P, where P is price in dollars . Qd is quantity demanded in millions of gallons per year. A. Create supply and demand tables corresponding to these

    asked on May 8, 2015
  26. math


    asked on April 7, 2015
  27. Physical science

    a mass of 10g of sodium nitrate is dissolved in 10ml of water at 80 degrees celsius, at what temperature will it start to precipitate?

    asked on January 6, 2015
  28. math

    question 1- john has nickels quarters and dimes totaling $3.30,21 coins in all,with one more nickel than dimes.How many of each type of coin does he have?

    asked on June 9, 2013
  29. math

    Find three consecutive integers such that the square of the third minus the first is equal to 2 more than 5 times the second.

    asked on November 27, 2012
  30. Physics

    A force F = (5i − 4j) N acts on a particle that undergoes a displacement Δr = (5i+j)m . (a) Find the work done by the force on the particle. (b) What is the angle between F and Δr?

    asked on October 6, 2012
  31. Physics

    A block of mass 3.00 kg is pushed up against a wall by a force P that makes an angle of  = 30.0° angle with the horizontal as shown below. The coefficient of static friction between the block and the wall is 0.25. (a) Determine the possible values for

    asked on September 26, 2012
  32. Houston community college

    A projectile is fired from ground level with an initial velocity of 50m/s and an initial angle of 30degree. Assuming g= 9.8 m/s*2, find: (a) The projectile total time of flight. (b) The maximum height attained (c) The total horizontal traveled (d) The

    asked on September 24, 2012
  33. Physics

    A projectile is fired from ground level with an initial velocity of 50m/s and an initial angle of 30degree. Assuming g= 9.8 m/s*2, find: (a) The projectile total time of flight. (b) The maximum height attained (c) The total horizontal traveled (d) The

    asked on September 24, 2012
  34. Mura

    Could anyone help me with this question...Mecury has a density of 13.6g/cm^3 at 20°C.What would be the density of mecury at 100°C?

    asked on March 15, 2012
  35. Physics

    Assume that you havea mass of 65 kg. I you are standing on the surface of Earth, What is the force of gravitational attraction between you and the earth?

    asked on January 24, 2012
  36. math

    1)An object is suspended from two points on the ceiling 25cm apart by two pieces of rope of lengths 27cm and 24 if the object exerts from a downward force 200N then find the tension in each rope 2)An airplane heading north at 550km/h encounters a wind of

    asked on September 17, 2011
  37. english

    The meanings of blow up,account for,call off,talk into and drag on.

    asked on September 15, 2011
  38. biology

    describe the events that take place in the eye when you come from a dark room to the outside where there is light

    asked on September 15, 2011
  39. social studies

    what happened as a result of the removal of the priest

    asked on February 22, 2011


    asked on February 1, 2011
  41. Chemistry

    Combustion analysis of 0.343 g of a compound containing C, H, and O produces 0.753 g of CO2 and 0.411 g of H2O. Mass spectral analysis shows that the compound has a molar mass around 120 g mol-1. What is the compound's: Empirical Formula:----- Molecular

    asked on March 25, 2010
  42. Math

    If a+b is less than c+d, and d+e is less than a+b than e is (1)less than c (3)less than d (2)equal to c (4)greater than d

    asked on September 20, 2009
  43. history

    What elementary school or high school did Paul Dunbar, the poet, go to?

    asked on February 26, 2009
  44. 6th grade geometry

    list the next 7 polygons after pentagon..

    asked on February 25, 2009
  45. Precalculus

    solve the equations for x a) e^2x - e^x - 30 = 0 b)1-3/n^x = 5

    asked on July 5, 2010
  46. physics

    a cork floats on the water as a water wacve passes by, what happens to the cork? will the cork's vibrational frequency be related to the water wave's frequency and if so, how?

    asked on March 4, 2008
  1. Science

    Am finding it difficult to answer.

    posted on July 22, 2020
  2. Social studies

    What event led to the first shots being fired at the battles of Lexington and Concord? *

    posted on May 12, 2020
  3. Social Studies

    What was the significance of the bottle at Fort necessity

    posted on May 12, 2020
  4. Math


    posted on April 9, 2020
  5. chemistry

    Because it gets to fat and gets destroyed by the smallest prick penetration

    posted on March 18, 2020
  6. maths

    I love you men it so important question thank you mfk

    posted on January 13, 2020
  7. Geometry


    posted on November 14, 2019
  8. can some one pleasee help me!!!

    Thanks for finally talking about >The molecular structures of two ‘penicillin-like’ compounds, A and B. in the

    posted on November 11, 2019
  9. English


    posted on June 4, 2019
  10. physics

    Solution to it

    posted on April 24, 2019
  11. physics

    The above question

    posted on April 24, 2019
  12. physics

    pls help am answer this question

    posted on March 12, 2019
  13. Chemistry

    (1.5e25)*(44.01) then divided 6.02*10^23 from both sides The answer would be 1096.56 g CO2

    posted on December 9, 2018
  14. i don't understand this math

    i agree with zena .1.c , 2.d, 3.b,4.c , i tell you 100%

    posted on September 17, 2018
  15. Physical Science

    No system is completely closed off from its surroundings. Which represents a system that is almost completely closed?

    posted on December 7, 2017
  16. Chemistry

    Dear andjerlkj, YG^trf5ygjtrfygboifvtrdcfg kind regards, Abrahama, HONONRS Cchemlk sutdent

    posted on November 26, 2017
  17. Algebra

    12.5 percent

    posted on November 14, 2017
  18. Operations Research

    answer to farm management

    posted on September 25, 2017
  19. Physics


    posted on October 15, 2016
  20. Career


    posted on October 15, 2016
  21. maths

    Yes I did,thanks again Ms.

    posted on May 27, 2016
  22. maths

    OK I see, thanks you so much.

    posted on May 26, 2016
  23. maths

    Yes i did. The figure that contains the digit 1 twice is only the number 11. I hope my answer is right.

    posted on May 26, 2016
  24. college algebra2

    4861 sq.in

    posted on April 24, 2016
  25. 8th grade

    Can't wait for college then the NBA.

    posted on September 17, 2015
  26. math


    posted on January 16, 2015
  27. Math

    an rope 10 feet long is tied to the top of a pole? if the rope is pulled tightly how for form the bottom of the pole should the rope be staked to the ground?

    posted on November 5, 2013
  28. physic

    c)I think maybe $8.00 is right .A fossil's monetary worth is truly only equal to what a collector is willing to pay for it. Still, there are some key things to consider in order to know how to price a fossil, whether you are a collector or a dealer. I

    posted on May 6, 2011


    posted on February 2, 2011
  30. algebra

    13d = _ min

    posted on April 3, 2010
  31. chemistry

    1.write the balanced equation 2.find the number of moles of N2O 3.find the molar ratio 4.if the ratio is 1:1 than the number of moles for N2O and oxygen will of the same value 5.find the mass using n=m/MM 6. rearrage the equation to get m=n*MM and you will

    posted on March 26, 2010
  32. physics

    thank you

    posted on March 5, 2008
  33. Pre-Algebra


    posted on March 4, 2008
  34. Pre-Algebra

    -7P+21+2P=24 -5P+21=24 -5P=3 P=-3/5

    posted on March 4, 2008
  35. Pre-Algebra


    posted on March 4, 2008