1. Physics

    A block weighing 70.7 N rests on a plane inclined at 21.6° to the horizontal. The coefficient of the static and kinetic frictions are 0.23 and 0.12 respectively. What is the minimum magnitude of the force F, parallel to the plane, that will prevent the

    asked by Lindsay on December 8, 2007
  2. physics

    A 9-kg block is held by a pulley system shown in fig. What force must the person exert in the following cases: a) to hold the block at rest. b) to lower it at 2m/s. c) to raise it with an acceleration of 0.5 m/s2? Ignore the mass of small pulley. Answer

    asked by Anonymous on March 22, 2016
  3. PHYSICS

    block 3M slides downward without friction. The string connecting blocks 3M and M is ideal (that is, its mass can be neglected and it is not stretchable). The pulley, a uniform solid disc of mass M and radius r , rotates without slipping. Find the

    asked by Ramana on December 6, 2013
  4. English

    Can you check if these sentences are simple, fragment, compound, or complex?: "Since the movie would last two hours, after dropping off the kids, mother decided to go shopping." Complex? "Kelly read The Plague as her summer novel." Simple? "Lawmakers

    asked by Max on May 26, 2018
  5. physics

    a plank of mass 5kg is placed on a frictionless horizontal table. further a block of mass 2kg is placed over the plank. A mass-less spring of natural length 2m is fixed to the plank by its one end. The other end of spring is compressed by the block by half

    asked by sreeram on January 16, 2011
  6. physics

    a plank of mass 5kg is placed on a frictionless horizontal table. further a block of mass 2kg is placed over the plank. A mass-less spring of natural length 2m is fixed to the plank by its one end. The other end of spring is compressed by the block by half

    asked by jessy on January 16, 2011
  7. PHYSICS

    If there is no dark matter, in order to explain our observations, our concepts of an important building block of the universe have to be incorrect. What is that building block and why do Astronomers overwhelmingly favor dark matter, which they cannot see,

    asked by AJ on December 14, 2015
  8. Physics / Astronomy

    If there is no dark matter, in order to explain our observations, our concepts of an important building block of the universe have to be incorrect. What is that building block and why do Astronomers overwhelmingly favor dark matter, which they cannot see,

    asked by AJ on December 10, 2015
  9. math

    Deepak is 10 years old, and his brother is 7 years old. In how many years time will their total age be 41.

    asked by jade on October 7, 2013
  10. Physics

    A 2kg block is in equilibrium on an incline of 60 degrees. find fn of the incline on the block

    asked by Lizzy on October 19, 2011
  11. geometry

    What shape will you always get when you combine a square pattern block and a triangle pattern block?

    asked by Mrs. Vargas on April 22, 2013
  12. geometry

    What shape will you always get when you combine a trapezoid pattern block and a triangle pattern block?

    asked by Mrs. Vargas on April 22, 2013
  13. Science

    A 13.0 kg block of concrete rests on a 5 cm by 2 cm board. What is the acceleration of the block of concrete here on Earth?

    asked by Ally on June 3, 2015
  14. Physics

    It takes 56 J to push a block 4 m. If the force is in the same direction as the displacement, what is the force on the block?

    asked by Tyler on March 3, 2014
  15. Physics

    A massive steel cable drags a 20kg block across a horizontal, frictionless surface. A 100N force applied to the cable causes the block to reach a speed of 4.2m/s in a distance of 2.1m . What is the mass of the cable?

    asked by Eric on May 30, 2015
  16. physics

    a force of 20n applied parallel to the surface of a horizontal table is just sufficient to make a block of mass 4.kg move on the table caculate thd coefficient of friction between the block and the table

    asked by fawaz on October 26, 2011
  17. Physics

    A force of 20N applied parallel to the surface of a horizontal table,is just sufficient to make a block of mass 4kg move on the table.calculate the coefficient of friction between the block and the table.

    asked by Jeremiah on February 11, 2012
  18. physics

    a force of 20n applied parallel to the surface of a horizontal table is just sufficient to make a block of mass 4.kg move on the table caculate thd coefficient of friction between the block and the table

    asked by fawaz on October 26, 2011
  19. 12th grade math

    a block of mass 77kg is placed at the top of a frictionless plane that is inclined 46degrees to the horizontal. The height of the plane is 23 meters. find the speed of the block at the bottom of the plane. Show the steps please, -thanks

    asked by frusterated on June 11, 2012
  20. Calculus

    A popular search engine is targeting European countries where the number of online households is expected to grow at a steady rate. Data was taken over time, and it was found that the number of online houses (in millions) projected can be modeled by the

    asked by Wiz on April 17, 2013
  21. Calculus

    A popular search engine is targeting European countries where the number of online households is expected to grow at a steady rate. Data was taken over time, and it was found that the number of online houses (in millions) projected can be modeled by the

    asked by Wiz on April 16, 2013
  22. Calculus

    A popular search engine is targeting European countries where the number of online households is expected to grow at a steady rate. Data was taken over time, and it was found that the number of online houses (in millions) projected can be modeled by the

    asked by Deeno on April 17, 2013
  23. need help

    These are from Spielvogel's "Western Civilization" and are part of a AP European History class: Ch. 10= 1. Compare the political developments in France and England with those in the Holy Roman Empire and Italy. What similarities and differences do you

    asked by study freak on August 28, 2005
  24. PHYSICS HELP PLEASE!!!

    A block of mass 2.62 kg is kept at rest as it compresses a horizontal massless spring(k = 141 N=m) by 15.3 cm. As the block is released, it travels 0.627 m on a rough hori- zontal surface before stopping. The acceleration of gravity is 9.8 m/s2 :Calculate

    asked by kitt on March 4, 2007
  25. Physics

    In Figure 9-61, block 1 (mass 2.0 kg) is moving rightward at 8 m/s and block 2 (mass 4.8 kg) is moving rightward at 2.8 m/s. The surface is frictionless, and a spring with spring constant of 1180 N/m is fixed to block 2. When the blocks collide, the

    asked by John on December 10, 2012
  26. Adv. Math

    Find the interest to the nearest cent Question #1 Amount: $5432 Annual Interest Rate: 6.2% Time: 3 years Question #2 $4500 at 5.5% for 4 1/2 years Question #3 $3680 at 6.75% for 2 1/4 years Question #4 5.5% for 1 3/4 years on $2543 I'm sorry for so many

    asked by Kenya on April 7, 2008
  27. Re: PHYSICS

    "Relative" is an important word. Block L of mass mL = 1.90 kg and block R of mass mR = 0.500 kg are held in place with a compressed spring between them. When the blocks are released, the spring sends them sliding across a frictionless floor. (The spring

    asked by COFFEE on February 27, 2007
  28. physics

    In Fig. 12-46, suppose the length L of the uniform bar is 2.95 m and its weight is 164 N. Also, let the block's weight W = 468 N and the angle θ = 33.8°. The wire can withstand a maximum tension of 520 N. (a) What is the maximum possible distance x

    asked by sweety on March 20, 2009
  29. Algebra 2

    "My husband's age," remarked a lady the other day, "is represented by the figures of my own age reversed. He is my senior, and the difference between our ages is one-eleventh of their sum." 10x + y = husband's age 10y + x = wife's age (10x+y) - (10y+x) =

    asked by Anonymous on October 25, 2011
  30. english

    At the foot of these fairy mountains the voyager may have descried the light smoke curling up from a village whose shingle roofs gleam among the trees, just where the blue tints of the upland melt away into the fresh green of the nearer landscape. It is a

    asked by mandy on May 5, 2013
  31. Economics

    Given the following data, use present worth analysis to find the best alternative, A,B, or C. A B C Initial cost $10,000 15,000 $12,000 Annual benefit 6,000 10,000 5,000 Salvage value 1,000 −2,000 3,000 Useful life 2 years 3 years 4 years Use an

    asked by Anonymous on September 30, 2014
  32. physics

    a block with a mass of 3.7 kg slides with a speed of 2.2 m/s on a frictionless surface. the block runs into a stationary spring and compresses it a certain distance before coming to rest. what is the compression distances, given that the spring has a

    asked by Ty on February 11, 2014
  33. Physics

    A block of mass 77.0kg is placed at the top of a frictionless plane that is inclined 46degrees to the horizontal. The height of the plane is 23.0meters. Find the speed of the block and the bottom of the plane. The correct answer is: 21.2m/s... I've tried

    asked by Genny on June 11, 2012
  34. physics

    A block slides down a frictionless ramp. If the ramp angle is 22 degrees and the length of it is 25m. find the speed of the block as it reaches the end of the ramp, assuming it started sliding from rest at the top.

    asked by rosie on December 9, 2010
  35. Chemistry!

    The heat lost or gained by a system is related to its temperature change by a property called its heat capacity. The molar heat capacity of metals at or above room temperature equals 24.92 J K-1mol-1. The temperature of a block of copper metal (molar mass

    asked by Anonymous on February 17, 2013
  36. Chemistry

    The heat lost or gained by a system is related to its temperature change by a property called its heat capacity. The molar heat capacity of metals at or above room temperature equals 24.92 J K-1mol-1. The temperature of a block of copper metal (molar mass

    asked by Caitlin on February 6, 2013
  37. ELA

    Where is the complete subject in this sentence, "The goal of settlement houses is the improvements of neighborhoods"?

    asked by Stella on November 2, 2010
  38. intro finance

    ddo tou think a middle class people should not be able to afford houses and cars?

    asked by mike on August 13, 2009
  39. History

    How might historians of the future describe the social significance of houses today, in 2015?

    asked by TayB on March 2, 2015
  40. physcs

    A small block of mass m1 = 0.500 kg is released from rest at the top of a curve-shaped frictionless wedge of mass m2 = 3.00 kg, which sits on a frictionless horizontal surface as in the figure below. When the block leaves the wedge, its velocity is

    asked by Anonymous on May 18, 2013
  41. Physics, Science

    A 26 kg block is connected to an empty 1 kg bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.435 and the coefficient of kinetic friction between the table and the block is 0.320.

    asked by Shae on October 3, 2010
  42. ★!!!PhYsIcS!!!★

    A 50 kg block is on a 30 degree incline. The coefficient of friction between the block and the incline is 0.05. If it is given an initial velocity of 10 m/s up the incline, how far will it travel until it stops?

    asked by ☆Mortimer☆ on October 20, 2008
  43. Physics

    An upright spring which is normally 3 m is compressed 2.3 m and a 2 kg block is placed on it. When it is 5 meters above the ground it is going 10 m/s. What is the spring constant of the spring? How high will the block travel?

    asked by Richard on November 3, 2008
  44. PHYSICS

    A 50 kg block is on a 30 degree incline. The coefficient of friction between the block and the incline 0.05. If it is given an initial velocity of 10 m/s up the incline, how far will it travel until it stops?

    asked by Bartholomew on October 19, 2008
  45. physics

    A 50 kg block is on a 30 degree incline. The coefficient of friction between the block and the incline 0.05. If it is given an initial velocity of 10 m/s up the incline, how far will it travel until it stops?

    asked by Fred on October 19, 2008
  46. college physcs

    A 0.150 block moving vertically upward collides with a light vertical spring and compresses it 4.50 before coming to rest. If the spring constant is 54.0 , what was the initial speed of the block? (Ignore energy losses to sound and other factors during the

    asked by Ramon on December 17, 2009
  47. as

    In the figure a 1.2 block is held at rest against a spring with a force constant = 740 . Initially, the spring is compressed a distance . When the block is released, it slides across a surface that is frictionless except for a rough patch of width 5.0 that

    asked by Anonymous on August 3, 2011
  48. Physics help

    A 0.50-kg block rests on a horizontal, frictionless surface, it is pressed against a light spring having a spring constant of k = 800 N/m, with an initial compression of 2.0 cm. To what height h does the block rise when moving up the incline? what would be

    asked by user on June 17, 2012
  49. physics

    A vertical spring stretches 13 cm when a 2.3 kg block is hung from its end. (a) Calculate the spring constant. This block is then displaced an additional 3.2 cm downward and released from rest. Find the (b) period, (c) frequency, (d) amplitude, and (e)

    asked by Mariaaaaaaa on September 17, 2016
  50. physics

    A 0.150 block moving vertically upward collides with a light vertical spring and compresses it 4.50 before coming to rest. If the spring constant is 54.0 , what was the initial speed of the block? (Ignore energy losses to sound and other factors during the

    asked by Ramon on December 17, 2009
  51. Physics

    Calculate the height that a block of ice at 0°C must be dropped to completely melt upon impact. Assume that all of the initial gravitational potential energy of the block goes into melting the ice. Hmmmm. http://www.jiskha.com/display.cgi?id=1162768243

    asked by Jennifer on November 5, 2006
  52. Simple interest

    Charlotte borrows $9000 over 5 years to buy a second hand car. The loan must be repaid over 5 years at 12% p.a. simple interest calculate the monthly repayment if the payments are spread equally over the 5 years.

    asked by Jake on February 21, 2017
  53. English

    1. He died at the age of 70. 2. He died at 70. 3. He died when he was 70 years old. 4. He died when he was 70. 5. He died aged 70. (Are all grammatical?) 6. You will be taller than her in a couple of years. 6-1. You will be taller than her in two years.

    asked by John on June 9, 2009
  54. math

    Twenty years ago Gabe invested $2,000. For the first ten years he earned 13% compounded semi-annually. For the next ten years he earned 8% compounded quarterly. What was the value of the investment now, at the end of the 20 years?

    asked by ricky on February 19, 2014
  55. General Physics

    A 35 kg block is pulled at a constant speed along a horizontal surface by a rope with tension FT . The rope is inclined at an angle from the horizontal as shown. The block moves a distance 15 m along the horizontal surface. What is the net work done by all

    asked by Charles on July 26, 2013
  56. Physics

    Sanding block weighs 2.0 N and is pushed with a force of 3.0 N at an angle of 30.0 degrees with respect to the vertical, and angled toward the wall. Moves straight up the wall at a constant speed. What is the coefficient of kinetic friction between the

    asked by Tammy on September 6, 2010
  57. PHYSICS

    a block is given an initial velocity of 3 m/s up the 22 degree plane. A.) How far up will the plane go B.) How much time elapses before it returns to its starting point. IGNORE FRICTION A) I got 1.2m B.) I got 1.6s I'm confused on this question: Both

    asked by J on February 24, 2016
  58. Math

    During a track meet Kelly throws the shotput 51 feet, 50 feet,and 58 feet. Write an expression that represents the length of her average throw in feet. Evaluate the expression.

    asked by Valerie on August 27, 2015
  59. Physics

    First, I'm sorry for asking a lot of questions, however I don't know how to solve any of these problems. Can you please help me by telling me how I should solve it and what formulas should be used? I don't want the actual answers but how to solve these

    asked by Stephanie on December 9, 2018
  60. Algebra

    As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it. a)The sales representative here tells you they also have two floor plans available, but they only have 38

    asked by Dolores on July 18, 2009
  61. Math

    A census taker came back to a house where a man lived with his three children. The census taker asked, "What is your house number?" The man replied, "The product of my children's ages is 72 and the sum of their ages is my house number." "But that's not

    asked by Anonymous on December 2, 2007
  62. math116

    2.As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it.   a.The sales representative here tells you they also have two floor plans available, but they only

    asked by Anonymous on July 16, 2010
  63. algebra

    As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it. a. The sales representative here tells you they also have two floor plans available, but they only have 38

    asked by Libby on June 21, 2011
  64. algerbra

    2. As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it. a. The sales representative here tells you they also have two floor plans available, but they only have

    asked by Anonymous on March 26, 2012
  65. Math

    Beyounce has a stack of $1 bills,Kelly has some $5 bills, and Michelle has more than $10 bills. Each person has the same amount of money. What is the least amount each one has?

    asked by Shakira on September 20, 2010
  66. Math

    Mark makes 10% of 100, Lindsay makes 5% of 400, Kelly makes 15% of 100, what's the median average?

    asked by Ellen on August 10, 2016
  67. Math

    " kelly has twelve cards numbered 1 to 12. what is the probability of picking three even-numbered cards consecutively, if the first two cards are not replaced?

    asked by Elizabeth on November 1, 2013
  68. PHYSICS _ please help

    A metal block of volume 1 * 10^3 cm^3 is suspended from a thread as shown in the diagram. It is lowered into a beaker of liquid of unknown density until it is completely immersed but does not touch the bottom of the beaker. The beaker rests on a balance.

    asked by GAIL on August 9, 2011
  69. Physics

    A 28.0kg block is connected to an empty 1.80kg bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.41 and the coefficient of kinetic friction between the table and the block is 0.35.

    asked by Ashley on September 25, 2009
  70. Physical Science

    A 28.0kg block is connected to an empty 1.80kg bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.41 and the coefficient of kinetic friction between the table and the block is 0.35.

    asked by Brittany on September 28, 2009
  71. physics

    A 3 kg block is attached to an ideal spring with a force constant k=200 N/m. The block is given an initial velocity in the positive direction of magnitude u= 12 m/s and no initial displacement (xi=0). Find a) the amplitude, b) the phase angle, and c) write

    asked by Scott on April 16, 2018
  72. physics

    A 0.150 kg block moving vertically upward collides with a light vertical spring and compresses it 4.50cm before coming to rest. If the spring constant is 54.0 N/m, what was the initial speed of the block? (Ignore energy losses to sound and other factors

    asked by Ramon on December 18, 2009
  73. Algebra 1

    I am kinda confused on this can someone help me? As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it. The sales representative here tells you they also have

    asked by Anonymous on July 2, 2008
  74. Math

    Gabriella is x years old.Her sister Felicia,is six years old than she is.Their mother is twice as old as Felicia.Their aunt,Tanya,is x years older than their mother.Write and simplify an expression that represents Tanya's age in years.

    asked by Nancy on January 14, 2015
  75. FINANCE

    Sir wants to save money to meet 3 goals. He would like to retire 30 years from now with retirement income of $25k monthly for 20 years, with the first payment received 30 years and 1 month from now. He would like to purchase a cabin in 10 years at a cost

    asked by Anonymous on February 5, 2010
  76. science

    why is it rare for the soft parts of an organism to become a fossil? a) the soft parts take a long time to decay b) the soft parts can be eaten by animals***** c) the soft parts cannot be buried in sediment d) the soft parts form petrified fossils which of

    asked by SkatingDJ on December 15, 2014
  77. physics

    rank higest to lowest air drag? 1)a 5lb lead block teraveling at 95% terminal speed. 2a 5lb styrofoam block at terminal speed? 3)a10lb styrofoam block traveling faster than terminal speed? 4)a 10lb styrofoam block at terminal speed? put in orderfrom least

    asked by taylur on January 26, 2012
  78. physics

    A 5.0 kg block of some unknown material is suspended from a spring scale and submerged in water.? The spring scale reads 39.3 N. What is the specific gravity of the block? I get 5051.5 kg/m^3 but its incorrect.

    asked by Joseph on June 27, 2012
  79. Physics

    A force of 15 N is applied at an angle of 30 degrees with the horizontal on a 0.75 block at rest on a frictionless surface. a. What is the magnitude of the resulting acceleration of the block? b. What is the magnitude of the normal force?

    asked by Tomomi on December 4, 2011
  80. Physics

    3.2 kg block is given an initial velocity of 12 m/s across horizontal surface. after travels 8 m speed is 2.4 m/s. determine coefficient of friction bewern block and surface and how far it travels before coming to rest

    asked by Anonymous on November 3, 2014
  81. science

    (c) Because static friction can adjust, the system can be at rest if the mass of block C is between some maximum value and some minimum value. What are these values if the coefficient of static friction between block B and the table is 0.200?

    asked by xxxxxxx on January 6, 2016
  82. Physics

    A 15 kg concrete block fell from a height of 20 meters and hits the ground below. If all of its original potential energy (PE) goes to the heat the block when it hits the ground, what is its change in terperature?

    asked by Gloria on December 19, 2010
  83. Physics

    A block of mass is pulled along a rough horizontal surface by a rope as sketched in the figure below. The tension in the rope is 45 N, and the coefficient of kinetic friction between the block and the surface is

    asked by Sierra on July 11, 2012
  84. Chemistry 2

    36.) Suppose a chemistry student discoveres that a block of pure ice is left on her porch as she goes to school one day. What will be the percent composition of the pure ice block?

    asked by Sam on September 9, 2015
  85. physics

    A 180 kg block is pulled at a constant speed of 8.3 m/s across a horizontal floor by an applied force of 135 N directed 15° above the horizontal. What is the rate at which the force does work on the block?

    asked by ghias on October 28, 2010
  86. Physics

    A person lifts a 5.2 kg cement block a vertical distance 1.2 m and then carries the block horizontally a distance 7.3 m. Determine the work done by the person and by the force of gravity in this process.

    asked by Mike on January 9, 2012
  87. Physics

    A 0.15kg bullet is fired into a 1.85kg block that is hanging from a 45cm string. What minimum initial bullet speed is required if the bullet and block are to make one complete revolution? Please show all work. I need this question answered as soon as

    asked by Sarah on January 13, 2016
  88. Physics

    A block of mass 77.0kg is placed at the top of a frictionless plane that is inclined 46 degrees to the horizontal. The height of the plane is 23.0 meters. Find the speed of the block at the bottom of the plane. Please show all your steps, don't just

    asked by Jen on June 11, 2012
  89. physics

    a block slides down a frictionless ramp. at the bottom of the ramp is a vertical circular loop with a radius of 75 cm. from what minimum height does the block need to be released in order to make it around the loop?

    asked by kassy on October 12, 2016
  90. physics

    A 13 g bullet traveling 235 m/s penetrates a 2.0 kg block of wood and emerges going 171 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges? in m/s

    asked by Anup on March 13, 2011
  91. Physics

    A 7 kg block is pulled 8 m along a frictionless horizontal plane by a 23 N force that acts at 39 degrees above the horizontal. What is the work done by the force on the block? I don't get how to start the problem, I feel like there is something missing.

    asked by vstudent on November 1, 2015
  92. shakhenbi

    a block of metal has a length of 20cm, breadth 10cm and height 5cm. its mass is 2.7kg. find the density of the metal in g/cm3. find out what the block is made of.

    asked by tomba on August 19, 2011
  93. physics

    a block of metal has a length of 20cm, breadth 10cm and height 5cm. its mass is 2.7kg. find the density of the metal in g/cm3. find out what the block is made of.

    asked by tomba on August 19, 2011
  94. physics

    Let's say you measure an average acceleration to be 0.44 ms-2. What is the height (in centimeters) of the riser block? Assume the legs of the track span 1.0000 m and that there is neither friction nor drag. Also assume the block is under one of the legs.

    asked by anthony on October 27, 2014
  95. physics

    7.0 kg block moves in a straight line on a horizontal frictionless surface under the influence of a force that varies with position as shown below. How much work is done by the force as the block moves from the origin to x = 8.0 m?

    asked by kunal on November 2, 2012
  96. Physics

    A 5.5 kg block is released from rest on a frictionless inclined plane making an angle of 23.3° with the horizontal. Calculate the time it will take this block when released from rest to travel a distance of 0.7 m along the ramp.

    asked by Anonymous on February 23, 2015
  97. Math

    It takes Kelly 3/4 hour to bake a small loaf of bread.how many loaves of bread can she bake in 3 3/4 hours if she bakes one loaf at a time.

    asked by Martha on February 5, 2014
  98. Survey Math help

    A movie complex has eight different movie theaters. The manager of the complex wants to conduct a survey to determine which snacks to add to the menu. Which represents the best sample the manager could use for the survey? Would I do specific ages the first

    asked by Kristin on May 1, 2014
  99. physics

    A 28.0 block is connected to an empty 2.20 bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.44 and the coefficient of kinetic friction between the table and the block is 0.35. Sand

    asked by xxx on October 31, 2011
  100. Physics

    Figure 6-24 shows an initially stationary block of mass m on a floor. A force of magnitude 0.540mg is then applied at upward angle 16 degrees. What is the magnitude of the acceleration of the block across the floor if (a)Us=.6 and Uk=.5 and (b) Us=.4 and

    asked by Stan on March 3, 2010