1. szabist imc larkana

    ten bricks each 6.0cm thick and mass of 1.5kg, lie on a table, how much work is required to stack them one on the top of another? A. 40j B. 88j C. 45j D. 0j E. None of these

    asked by basit shah on July 29, 2011
  2. Science

    Eight bricks 6 cm thick with mass 1.5kg lie flat on a table.how much work is required to top them one on another?

    asked by Christopher on May 14, 2012
  3. Physics

    Eight books, each 4.1 cm thick with mass 1.8 kg, lie flat on a table. How much work is required to stack them one on top of another?

    asked by Linda on November 10, 2010
  4. physic

    Eight books, each 8.5 cm thick with mass 1.3 kg, lie flat on a table.How much work is required to stack them one on top of another?

    asked by Anonymous on October 14, 2010
  5. Physics

    Six identical books, 4.0 cm thick and each with a mass of 0.8kg, lie individually on a flat table.How much work would be needed to stack the books one top of the other?

    asked by Kayla on October 10, 2017
  6. Phyics help

    I have a few physics questions: 1. How much mechanical work is done by a weightlifter holding a mass of 100 kg, 2.0m above the floor for 3.0 s? Explain ur answer. 2. Calculate the force needed to do 2.0 kJ of work to push a load of bricks 10m? 3. A

    asked by Anonymous on April 9, 2011
  7. Physics

    This is a question related to work. Today we had a pop quiz in my physics class and I am just trying to check my work here :D 1) if there is a 5 kg block on a horizontal table connected with string to a 3 kg block hanging off the side of the table through

    asked by William on October 20, 2014
  8. physics

    Two point charges lie on the x axis. A charge of 6.2μC is at the origin, and a charge of -9.5μC is at x=10.0cm. What is the net electric field at (a) x=−4.0cm and at (b) x=+4.0cm?

    asked by afton on January 30, 2014
  9. AP Physics C

    when a block is pulled out to x=+4.0cm, we must apply a force amgnitude 360N to hold it there. we pull the block to x=11cm and then realease it. how much work does the spring do on the block as the block moves from xi=+5.0cm to a)x=+3.0cm, b)x=-3.0cm,

    asked by Olivia on October 3, 2012
  10. Maths

    For this question, use the copy of the Random Number table provided at the end of this AAT. (This table was copied from page 111 in the Textbook.) Select 48 values according to the following criteria. o The first thirty (30) numbers must lie in the range

    asked by Anna on February 25, 2013
  11. physics

    Please reference the illustration at: screenshotsfirefoxcom/kBXqJ4tycTCPwjUw/brilliantorg to answer the following question: On the edge of a wall, you build a brick tower that only holds because of the bricks' own weight. Your goal is to build a stable

    asked by unowen on December 1, 2017
  12. Physics

    Four bricks are to be stacked at the edge of a table, each brick overhanging the one below it, so that the top brick extends as far as possible beyond the edge of the table. *The construction in stable equilibrium, bricks must extend no more than (starting

    asked by Anonymous2.0 on November 20, 2015
  13. Maths A

    For this question, use the copy of the Random Number table provided at the end of this AAT. (This table was copied from page 111 in the Textbook.) Select 48 values according to the following criteria. o The first thirty (30) numbers must lie in the range

    asked by Anna on February 25, 2013
  14. maths

    A wall 24m long, 0.4m thick and 6m high is constructed with the bricks each of dimensions 25cm X 16cm X 10cm. If the mortar occupies 1/10th of the volume of the wall, then find the number of bricks used in constructing the wall.

    asked by dev on December 16, 2012
  15. pysc

    an object A 2.5kg is traveling at 25meters per second collides head on with a 5kg mass b calculate the velocity of the 5kg mass if 1.the mass b is initially at rest 2.traveling opposite to mass A at 20m/s 3.traveling in the same direction as A at 12m/s

    asked by shristi on March 5, 2011
  16. Optics

    A converging lens of focal length f1 = +22 .5cm is placed at a distance d = 60 .0cm to the left of a diverging lens of focal length f2 = −30.0cm. An object is placed on the common optical axis of the two lenses with its base 45.0cm to the left of the

    asked by Anon on March 3, 2018
  17. Maths A

    Select 48 values according to the following criteria. o The first thirty (30) numbers must lie in the range from 48 to 58 inclusive. o The next ten (10) numbers must lie in the range from 30 to 70 inclusive. o The remaining eight (8) numbers must lie in

    asked by Anna on February 25, 2013
  18. physics

    Object 1 has a velocity of 3m/s and a mass of 5kg. Object 2 also has a mass of 5kg but isn't moving. Object 1 collides with Object 2 and they move off together. Work out their speed using the principle of conservation of momentum.

    asked by help me on March 3, 2015
  19. Science

    A 1500 W winch is used to raise a load of bricks to a height of 25m. If the bricks need to reach this height in 1.5 minutes. What is the maximum allowable mass of the load bricks?

    asked by Masabata on May 1, 2019
  20. Math

    Julia wants to build another garden wall, 10 bricks long and 3 bricks high. Can she build it with red and white bricks, so that no two bricks of the same color are next to each other? r w r w r w r w r w w r w r w r w r w r r w r w r w r w r w I say yes.

    asked by Smiley on January 29, 2009
  21. math

    bricks are stacked in 20 rows such that each row has a fixed number of bricks more than the row above it. the top row has 5 bricks and the bottom row 62 bricks. how many bricks are in the stack?

    asked by Riana on January 1, 2013
  22. english

    How do I know when to use lay or lie? Thank you for using the Jiskha Homework Help Forum. Many people use them interchangeably and perhaps some day that will be the norm. As far as English grammar books are concerned: Lay means "to place something down."

    asked by carol on March 4, 2007
  23. Physics

    A spring is mounted horizontally. A crate which has a mass of 8.5kg is pressed against the spring with a force of 350N. As a result the spring is compressed a distance of 82.0cm. The mass is then released and is allowed to slide along the horizontal,

    asked by James on February 26, 2012
  24. Math

    Building Bricks A child is playing with building bricks like this one. He decides to build the simple tower shown. How many bricks would he need to build this tower? If the last column was 14 bricks high how many bricks would he need? If the last column

    asked by Sandy on August 1, 2016
  25. PHYSICS - HELP

    Two ingenious 120 student students decide to use an oscillating mass on a spring to check the shutter (exposure) time of their camera. They set up vertically alongside the mass and spring. A pointer attached to the mass allows the scale on the meter stick

    asked by Melissa on August 7, 2011
  26. Chemistry

    Same with these: How do you do them? 1.)What is the mass at 20 degrees Celsius of 5 liters of air? 2.)What is the volume in liters of a kilogram of ice at 0 degrees Celsius? 3.)What is the mass of a bar of aluminum measuring 1.0cm by 1.0cm by 10.0cm?

    asked by Kelsi on February 27, 2014
  27. Chemistry

    Same with these: How do you do them? 1.)What is the mass at 20 degrees Celsius of 5 liters of air? 2.)What is the volume in liters of a kilogram of ice at 0 degrees Celsius? 3.)What is the mass of a bar of aluminum measuring 1.0cm by 1.0cm by 10.0cm?

    asked by Kelsi on February 27, 2014
  28. Physics

    A spring is mounted horizontally. A crate which has a mass of 8.5kg is pressed against the spring with a force of 350N. As a result the spring is compressed a distance of 82.0cm. The mass is then released and is allowed to slide along the horizontal,

    asked by Rob on February 25, 2012
  29. Physics

    A construction hoist does 2.74x10⁴J of work in lifting a load of bricks from the street to the roof of a building. The roof is 9.46m above the street. Calculate the mass of a load of bricks. The load is moving at a constant rate

    asked by physics on October 30, 2018
  30. physics

    A mass m1 = 6.0 kg sits on a frictionless table, and rotates at a constant speed v = 3.0 m/sin a circle of radius R = 1.5 m. m1 is attached by a massless string which passes through a hole in the centre of the table to a second m2 (which hangs freely

    asked by Leon on April 12, 2012
  31. physics helppp!

    The coeffcient of friction between the 7.9 kg mass and the table is 0.55, and the coeffcient of friction between the 5 kg mass and the table is 0.38. Consider the motion of the 37 kg mass which descends by the amount of y = 0.45m after releasing the system

    asked by kitt on March 1, 2007
  32. Math

    Bricks have a mass of 1.57 kg each. How many bricks are there in 5whole number 1/4tonnes ?

    asked by Nuwel on September 23, 2014
  33. Math

    Bricks have a mass of 1.75kg each. How many bricks are there in 5wholenumber 1/4 tonnes

    asked by Nuwel on September 24, 2014
  34. PHYSICS - HELP

    Two ingenious 120 student students decide to use an oscillating mass on a spring to check the shutter (exposure) time of their camera. They set up vertically alongside the mass and spring. A pointer attached to the mass allows the scale on the meter stick

    asked by Melissa on August 5, 2011
  35. PHYSICS

    Two ingenious 120 student students decide to use an oscillating mass on a spring to check the shutter (exposure) time of their camera. They set up vertically alongside the mass and spring. A pointer attached to the mass allows the scale on the meter stick

    asked by Melissa on August 4, 2011
  36. physics

    A 4 kg wooden block rest on a table. the coefficient of friction between the block and the table is .40. a 5kg mass is attached to the block by a horizontal string passed over a frictionless pulley of neglible mass what is the acceleration of the block

    asked by Tori carr on February 2, 2010
  37. Math [Probability]

    I'm in a Grade 12 Data Management Course. The Current unit is Factorials and Permutations. I'm having a trouble with this question. The answer is suppose to be 120 but I don't know how. How many different ways can 6 people be seated at a round table?

    asked by Jerry on September 10, 2006
  38. physics

    A square bar with a mass of 0.830 kg and 19.3cm long (l) rests on two parallel horizontal rails that are 18.0cm apart (d) and 120.0cm long (L) as shown in the figure. (By horizontal it is meant that the rails lie in a plane perpendicular to the local

    asked by Trisha on February 20, 2015
  39. physics

    A .1kg mass is located on the line between a 5kg mass and a 10kg mass. It is 4m to the right of the 5kg mass and 6m go the left of the 10kg mass. What is the magnitude and direction of the net force on the .1kg mass?

    asked by Jen on November 17, 2011
  40. Physics

    Two springs are set up on a table. The longer spring has a spring constant of 221 N/m and an initial length of 44.0cm. The shorter spring has a spring constant of 725 N/m and an initial length of 22.0cm. How far above the table is an 9.30kg ball when it

    asked by john on December 17, 2015
  41. Physics

    Two springs are set up on a table. The longer spring has a spring constant of 221 N/m and an initial length of 44.0cm. The shorter spring has a spring constant of 725 N/m and an initial length of 22.0cm. How far above the table is an 9.30kg ball when it

    asked by Anon on December 17, 2015
  42. physics

    A 0.50kg mass is suspended on a spring that stretches 3.0cm. a. What is the spring constant? b. What added mass would stretch the spring an additional 2.0cm? c. What is the change in potential energy when the mass is added?

    asked by Ricky on November 21, 2017
  43. Math

    A pile of bricks has 85 bricks in the bottom row, 81 bricks in the second row up, 77 in the third, and so on up to the top row that contains only 1 brick. How many bricks are in the 12th row? I don't know if I'm right but I attempted this problem below c =

    asked by Anonymous on December 27, 2010
  44. Physical Science

    How much work is needed to raise a 110-kg load of bricks 12 m above the ground to being under construction? work in joules= weight*height where weight is mass*9.8m/s^2

    asked by Tammy on January 9, 2007
  45. Physics

    A 900W motor is used to lift 275.51kg of bricks a distance of 30, to the roof of the building. a. If the motor ran for 90s how much work did it do? b. What is the potential energy of the bricks? I know how the calculate work, but I'm really confused about

    asked by Jacie on January 6, 2011
  46. Math

    Tricia is buildng a rectangular patio. There will be 108 bricks wide and 19 bricks long. Tricia has 2000 bricks. Does she have enough bricks to build the patio? 108 x 19 = 2052

    asked by Tiera on September 24, 2015
  47. physics

    a uniform meter rod AB of mass 80g and 0.1m length is supported by knife edges placed 15.0cm frim its ends. What will be the reactions a5 these support when 20kg mass is suspended 10cm from the mid point of the rod towards A and a vertical upward force of

    asked by BIZHATOCOTO on April 11, 2019
  48. Physics

    One-fourth of length L is hanging down over the edge of a frictionless, table. The rope has an uniform, linear density (mass per unit length), lambda, and the end already on the table is held by a person. a) How much work does the person do when she pulls

    asked by Leshawn on October 15, 2010
  49. Math

    A brick patio has the approximate shape of a trapezoid. The patio has 16 rows of bricks. The first row has a = 13 bricks and the 16th row has b = 28 bricks. How many bricks are in the patio?

    asked by Sarah on December 12, 2017
  50. Science

    An object with a mass of 5kg collides witn an object with a mass of 3kg that is stationary.the two objects stick together and move on with a velocity of 6m.-1 .what was the velocity of the 5kg mass before the collision took place?

    asked by Zinhle on February 13, 2012
  51. Physics

    A 0.50kg mass is suspended on a spring that stretches 3.0cm. a. What is the spring constant? b. What added mass would stretch the spring an additional 2.0cm? c. What is the change in potential energy when the mass is added? Conservation of energy is not my

    asked by RICky on November 18, 2017
  52. MATH

    a pile of bricks has 85 bricks in the bottom row, 79 bricks in the second row, 73 in the third row, and so on until there is only 1 brick in the top row. how many bricks are in the 12th row? how many rows are there in all?

    asked by Katie on October 31, 2011
  53. math

    I really do not know how to get the answers to these, can you show me on a table form? Thanks 155km to m 2.56Ml to l 155um to mm 1,850nm to mm 1.68Gm to Mm 165pm to nm 2,750u to M 1.5kg to mg I would like to know how to work these out. Thank you

    asked by jo on October 12, 2009
  54. maths

    A brick wall is built by using 2 bricks less in each layer than in the previous one. The wall has m layers and in total 21m+40 bricks are used. If the top layer has only 4 bricks, determine:A) the value of m b) the total number of bricks in the wall

    asked by Anonymous on February 21, 2010
  55. physics

    A group of construction workers are building a house and want to lower down an excess bundle of 2390 kg bricks to ground. They tie one end of a rope to the bundle of bricks, loop it through a pulley, and tie the other end of the rope to a toolbox. If the

    asked by Marina on October 19, 2016
  56. physics

    A group of construction workers are building a house and want to lower down an excess bundle of 1420 kg bricks to ground. They tie one end of a rope to the bundle of bricks, loop it through a pulley, and tie the other end of the rope to a toolbox. If the

    asked by Thank you on November 1, 2016
  57. physics

    Find the amount of work done by a labourer,who carries 'n' number of bricks of mass 'm' kg each to the roof of a house of height 'h'.

    asked by Anonymous on October 30, 2011
  58. basic technology

    a man 80kg carries a load of bricks of mass 20kg up a vertical ladder of length 6m what work has he done

    asked by ISAAC on January 11, 2016
  59. Physics

    How much work (in J) must be done to lift a stack of bricks, which has a mass of 600 kg, from the ground to a height of 15 m? Acceleration due to gravity is 10 m/s2

    asked by Fallon on April 30, 2010
  60. Physics

    A block oscillates on a spring and passes its equilibrium position with a speed of .157m/s. It's kinetic energy is zero when the block is at the distance of .1m from equilibrium. Assume no friction between the block and the table. v=.157m/s KE =0J when

    asked by Andrea on March 3, 2008
  61. geometry

    A table is set for dinner. Can the legs of the table and the top of the table lie in parallel planes? Why or why not?

    asked by Heather on October 8, 2011
  62. Physics

    A 0.250 kilogram box has a speed of 2m/s when it is 1.2 meters from a second mass. It is sliding on a table with a coefficient of friction of 0.20. The box collides and sticks to a 0.5kg box that sits on the end of the table, causing the boxes to fall. How

    asked by Dan on November 18, 2008
  63. physics

    A 5kg mass was lifted 365cm, how much work was done against gravity?

    asked by Jennifer on December 4, 2012
  64. English

    1. I have a staff who works for me. 2. I have a staff who work for me. 3. I have a staff of one who works for me. 4. I have a staff of ten who work for me. 5. I have ten staff who work for me. 6. I have ten staffs who works for me. 7. I have ten step

    asked by rfvv on September 25, 2014
  65. Physics

    A block of mass 5kg is lifted 2m in 3sec. Find the work done.

    asked by Andy on April 22, 2011
  66. English

    I need a opening line which will grab my reader's attention right away. Here are some examples: *"I was on fire" *"Everybody lies. cops lie. laywers lie. witnesses lie. victims lie." I can't think of anything. Any suggestions?

    asked by Sara on March 4, 2010
  67. Math

    If 600 bricks measuring 12" by 18" are required to build a wall 10 ft. high (one brick thick), how long is the wall?

    asked by Bria S. on June 17, 2013
  68. physics

    For a spring block system M=2.72*10^5kg frequency 10.0 hertz and amlitude 20.0cm (a) What is E (b) What is the block speed at its passes the equlibrium point.

    asked by Ghazala shoaib on February 12, 2012
  69. physics

    A 15.0cm object is placed 60.0cm from a convex lens which has a focal lenght of 15.0cm use the thin lens equation to find the distance of the image (60)1/15=1/60+1/60(1/15)=1-1+1/d

    asked by maria on April 23, 2015
  70. physics

    A rotating platform is on a table and an object is on the platform. The platform has a diameter of 30.0cm and it has a string wrapped around it. The string is threaded over a pulley ( which is right next to the platform and attached to the edge of the

    asked by Adam on July 26, 2017
  71. Heat Transfer

    The inside wall of a furnace needs to be designed such that it transmits a maximum heat flux of 600 W/m2 . The inside wall temperature will be 1100°C and the outside temperature will be 150°C. We have two different types of bricks from which we can make

    asked by Jacob on September 9, 2015
  72. chemistry

    Perform this operation and report the answer to the correct number of significant figures: What is the mass of a cube of aluminum that is 4.0 cm on each edge? The density of aluminum is 2.7 g/cm3. Show all calculations leading to an answer. Vcube=

    asked by Ciaria on March 3, 2015
  73. maths

    find the number of bricks, each measuring 25 cm x 16 cm x 10 cm required to construct a wall 24 m long, 6 m high and 0.4 m thick. the mortar occupies (1/10)th of the volume of the wall

    asked by leena on February 25, 2013
  74. physics

    if mass is not an issue then how much force is required to move a ten no. 'shake flashlight' .will it be equal to move a single flashlight or will have to work ten times more to shake these ten flashlights? Note these flashlights are based on magnetic

    asked by vikram on September 21, 2016
  75. Physics

    1) A 2.5kg durian falls from a tree with a height of 30m. Determine the energy before it falls in Joule. 2) A 2.5kg durian falls from a tree with a height of 30m. Determine the velocity when it drops 20m from the ground. 3) A 2.5kg durian falls from a tree

    asked by Enileda on September 25, 2016
  76. Physics

    A certain amount of work is required to stretch a spring from its equilibrium position. (a) If twice the work is performed on the spring, the spring will stretch more by a factor of (1)square root of 2 (2)2,(3)1/square root of 2, (4)1/2. Why? (b) If 100J

    asked by Ricky on October 10, 2017
  77. PHYSICS HELP

    A solid cylinder has an area of 10cm2 and a height of 1.0 m. The cylinder is composed of two different materials with mass densities of 2000 kg/m3 and 1500 kg/m3. If each of the two materials occupies an equal volume, what is the mass of the cylinder?

    asked by Melissa on August 8, 2011
  78. Physics

    An electric motor is used to lift a load of bricks through a vertical height of 20m.the tension in the cable attached to the electric motor is 2000N.calculate work done by the electric motor on the bricks

    asked by Wendy on March 18, 2019
  79. maths

    a circular section 8.0cm in diameter is marked out 9f a rectangular plate 20cm ×18cm in dimensions. if the centre of the section marked out lie on the diagonal abd is 7.0cm from the centre of gravity of the rectangular plate, determin the position of the

    asked by BIZHATOCOTO on April 11, 2019
  80. Physics 121

    Two block are connected by a rope that runs over a pulley. The block on the tables has mass 4kg, the hanging block has mass 2kg, and the pulley has mass 0.5kg and radius 0.25m. Assume that the table is friction-less. If the block are released from the

    asked by Bob on May 6, 2012
  81. CHEMISTRY

    A solution of a metal carbonate M2CO3, was prepared by dissolving 7.46 g of the anhydrous solid in water to give 1000cm^3 of solution. 25.0cm^3 of this solution reacted with 27.0cm^3 of 0.100 mol/dm^3 hydrochloric acid. Calculate the relative formula mass

    asked by DAVID on July 9, 2016
  82. Physics

    A hockey puck of mass m = 70 g is attached to a string that passes through a hole in the center of a table, as shown in the figure below. The hockey puck moves in a circle of radius r = 1.20 m. Tied to the other end of the string, and hanging vertically

    asked by Ryan on September 30, 2016
  83. math

    If you have 30 white lego bricks, 42 red lego bricks, and 45 black lego bricks and you pull them out of a bag one at a time until one is left, what is the probability the last brick will be black

    asked by Madison on September 19, 2012
  84. physics (mirror)

    a diverging mirror of 52.0 focal lenght produces a virtual image of 26.0cm from the mirror. how far from the mirror should the object be placed? solution f=-52.0cm, v=-26.0cm 1/u + 1/v = 1/f rearranging the terms 1/u = 1/f - 1/v substituting the values of

    asked by Matrix School 2 on July 28, 2009
  85. Algebra

    A brick staircase has a total of 16 steps The bottom step requires 112 bricks. Each successive step requires 4 fewer bricks than the prior one. How many bricks are required to build the staircase?

    asked by Amber on March 7, 2011
  86. Physics 121

    Two block are connected by a rope that runs over a pulley. The block on the tables has mass 4kg, the hanging block has mass 2kg, and the pulley has mass 0.5kg and radius 0.25m. Assume that the table is friction-less. If the block are released from the

    asked by Phil on May 5, 2012
  87. soil mechanic

    2. A stratum of sand 2.5 m thick overlies a stratum of saturated clay 3 m thick. The water table is 1 m below the surface. For the sand, Gs = 2.65, e = 0.50 and for the clay Gs = 2.72, e = 1.1. Calculate the total and effective vertical stresses at depths

    asked by Anonymous on December 17, 2016
  88. language arts

    which is the best paraphrase of these lines from "January"? Fat Snowy Footsteps Track the floor, A)Thick, snowy footprints show where animals walked B)Thick, snowy outlines of feet mark the floor ****** C)Large snow boots lie on the floor of the house D)A

    asked by HELP on October 10, 2016
  89. LA Check please

    which is the best paraphrase of these lines from "January"? Fat Snowy Footsteps Track the floor, A)Thick, snowy footprints show where animals walked B)Thick, snowy outlines of feet mark the floor ****** C)Large snow boots lie on the floor of the house D)A

    asked by Shay on January 30, 2015
  90. English

    Which is the best paraphrase of these lines from "January"? Fat snowy footsteps Track the floor, A. Thick, snowy footprints show where animals walked. B. Thick, snowy outlines of feet mark the floor. C. Large snow boots lie on the floor of the house. D. A

    asked by Anonymous on March 6, 2019
  91. Math

    An owner determined that he needs 4 truck loads of bricks to build his patio. If a truck can carry 8 3/4 cubic yards of bricks, how many cubic yards of bricks will be needed to do the job?

    asked by Ryan on January 26, 2010
  92. Pysics science

    How much work is done when a bucket of mass 1.5kg with 10g of water in it is pulled up from the bottom of a well 8m deep? Take g=9.8m/s2 (a)100.3j(b)2000.5j(c)901.6j(d)453.7j

    asked by Sammmy on April 13, 2015
  93. science

    A net force of 10N to a 5kg mass. By how much does a body accelerate? Given: F=10N; M=5kg

    asked by sophia lorraine on December 5, 2011
  94. Physics

    A 4kg wooden block is placed on a wooden table, so the coeficent of friction would be 0.2. There is a string connected to both sides of the wooden block with a pulley system at the end of the table to go off and then each string has a different weight

    asked by Taylor on October 4, 2010
  95. Science

    A 0.5kg cart connected to light spring for which the force constant is 20 Nm on horizontal frictionless air track. Calculate the total energy of the system and the maximum speed of the cart if the amplitude of the motion is 3.0cm

    asked by Anonymous on May 5, 2019
  96. PHYSICS/ GRAVITATIONAL CONSTANT

    Three masses are arranged in the (x,y) plane. The X and Y units are meters 4kg at (-1,5 3kg at (1,1) 5kg at (0,0) What is the magnitude of theresulting force on the 5kg mass at the origin? The universal gravitational constant is 6.673e-11 N*m^2/kg^2.

    asked by CJ on November 12, 2010
  97. math (algerbra)

    A bricklayer's assistant starts building a wall, laying 50 bricks per hour. Two hours later the master comes and lays down 80 bricks per hour. x= number of hours since the assistant has been laying. Qusestion-------- Write expressions for the number of

    asked by Erin W!!!!!! on November 11, 2007
  98. physics

    In the following diagram, the hanging mass is 3.5kg, and the box has a mass of 1.5kg. If the force of the box with the surface is 0.80N, a) find the acceleration of the masses b)determine the force of tension in the string The diagram shows a box on a

    asked by codyramsz on November 9, 2011
  99. Maths

    A 73kg workers need to transport concrete bricks using a trolley to the construction area via an elevator. The trolley weighs 100kg while 5 concrete bricks weigh 330kg. If the elevator has a maximum capacity of 1500kg, how many bricks can the worker

    asked by Nan on February 19, 2016
  100. physics

    A uniform meterstick pivoted at its center has a 80.0g mass suspended at the 28.0cm position.At what position should a 80.0g mass be suspended to put the system in equilibrium?What mass would have to be suspended at the 90.0cm position for the system to be

    asked by Anonymous on June 24, 2013

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