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 3, 2007
  2. PHY101

    A body weighing 3500N is pushed up a rough inclined plane by a force of 5000N. The angle of inclination is 30deg. and the force is applied horizontally. If the coefficient of kinetic friction is 0.5, calculate the acceleration of the body.

    asked by Ebieride on May 17, 2016
  3. Physics

    A youngster shoots a bottle cap up a 15.0° inclined board at 1.92 m/s. The cap slides in a straight line, slowing to 0.95 m/s after traveling some distance. If the coefficient of kinetic friction is 0.35, find that distance. Can someone please show me the

    asked by Lindsay on December 4, 2007
  4. Chemistry

    Silicon is an element that is directly below carbon on the periodic table. Silicon can form bonds similar to carbon. Silicon-silicon single bonds require 222 kJ/mol of energy to break. Based on the statements, how much energy would it take to break a

    asked by Summer on April 9, 2018
  5. algebra

    Minute hand of a clock is 10 inches long. how far does the tip of the minute hand move in 15 seconds? I got that=5 pi BUT What speed is it moving in miles/hr???? algebra - PsyDAG, Sunday, November 13, 2011 at 1:38am Assuming it does move 5 pi, convert 5 *

    asked by Angela on November 13, 2011
  6. Science

    What force do you need to push on a large crate to accelerate it at 1.8m/s2 across a rough floor? The crate has mass 32kg and the coefficient of kinetic friction between the crate and floor is 0.57

    asked by Becky on November 20, 2014
  7. physics

    A toboggan slides down a hill and has a constant velocity. The angle of the hill is 6.50° with respect to the horizontal. What is the coefficient of kinetic friction between the surface of the hill and the toboggan?

    asked by francis on June 30, 2013
  8. Physics

    A child goes down a playground slide that is inclined at an angle of 24.5° below the horizontal. Find the acceleration of the child given that the coefficient of kinetic friction between the child and the slide is 0.305.

    asked by Manny on October 5, 2010
  9. Physics

    A child goes down a playground slide with an acceleration of 1.24 m/s^2. Find the coefficient of kinetic friction between the child and the slide if the slide is inclined at an angle of 32.0 degrees below the horizontal.

    asked by Abby on February 23, 2010
  10. physics

    a horizontal force of 95 N is applied to 60 kg crate on rough , level surface. if crate accelerates at 1.20 m/s2 , what is magnitude of the force of kinetic friction acting on the crate?

    asked by jerry on February 28, 2010
  11. Physics

    A 4 kg block slides down a rough inclined plane inclined at 30° with the horizontal. Determine the coefficient of kinetic friction between the block and the surface if the block has an acceleration of 1.2 m/s2.

    asked by La La on October 6, 2012
  12. physics

    A toboggan slides down a hill and has a constant velocity. The angle of the hill is 6.70° with respect to the horizontal. What is the coefficient of kinetic friction between the surface of the hill and the toboggan?

    asked by chidera on September 23, 2014
  13. Physics

    A 4 kg block slides down a rough inclined plane inclined at 30° with the horizontal. Determine the coefficient of kinetic friction between the block and the surface if the block has an acceleration of 1.2 m/s2.

    asked by La La on September 30, 2012
  14. phy

    A child goes down a playground slide with an acceleration of 1.36 m/s^2. 1-Find the coefficient of kinetic friction between the child and the slide if the slide is inclined at an angle of 28.0 deg below the horizontal.

    asked by pop on July 18, 2011
  15. Physics help

    1. The fundamental force that: (4 marks) ____ 1. causes hair to stand on end after being rubbed by a balloon a) strong nuclear ____ 2. causes protons to remain in the nucleus despite repulsive forces b) weak nuclear ____ 3. controls the planets' orbit

    asked by Matt Damon on February 4, 2016
  16. Physics

    A crate is sliding down a ramp that is inclined at an angle 37.9 ° above the horizontal. The coefficient of kinetic friction between the crate and the ramp is 0.330. Find the acceleration of the moving crate.

    asked by Amanda on December 19, 2012
  17. physics

    A 10 kg block slides 4.0 m down a ramp (having a coefficient of kinetic friction of 0.4 everywhere along the ramp) as shown above, then collides with a spring whose spring constant is 250 N/m. What is the maximum compression of the spring?

    asked by Anonymous on November 13, 2014
  18. physics

    You pull a 18 kg sled across the floor with a strap that is at an angle of 40° above the horizontal with a force 86 N. Find the magnitude of the acceleration of the sled, given that the coefficient of kinetic friction between the sled and the floor is

    asked by christina on September 22, 2012
  19. physics

    A skier slides horizontally along the snow for a distance of 20.8 m before coming to rest. The coefficient of kinetic friction between the skier and the snow is 0.0449. Initially, how fast was the skier going?

    asked by n_sdn on December 7, 2013
  20. Physics

    A crate is sliding down a ramp that is inclined at an angle 26.8 ° above the horizontal. The coefficient of kinetic friction between the crate and the ramp is 0.260. Find the acceleration of the moving crate.

    asked by Anonymous on March 4, 2016
  21. Physics

    A skier slides horizontally along the snow for a distance of 12.1 m before coming to rest. The coefficient of kinetic friction between the skier and the snow is 0.0343. Initially, how fast was the skier going?

    asked by Ben on August 27, 2015
  22. physics

    You push a large 32 kg crate across the floor with a force F=330 N at an angle of 21 degrees below the horizontal. If the coefficient of kinetic friction between the crate and the floor is 0.45, what is the acceleration of the crate?

    asked by Ka on September 21, 2010
  23. physics

    A skier slides horizontally along the snow for a distance of 22.3 m before coming to rest. The coefficient of kinetic friction between the skier and the snow is 0.0500. Initially, how fast was the skier going?

    asked by Candy on February 27, 2012
  24. Science

    Example of a concept map for potential energy

    asked by Michael on November 16, 2011
  25. Biology

    ATP provides cells with energy needed for?

    asked by Jefery on March 22, 2010
  26. Science

    What tool is used to capture the energy in sunlight?

    asked by Anonymous on March 31, 2014
  27. chemistry

    what is the energy of a photon with the frequency of 3.5 x 10 delta 24 hz?

    asked by zahra on December 17, 2010
  28. chemistry

    Why does the total energy (Ke+Pe) decrease with height?

    asked by Maddie on December 6, 2009
  29. Human Biology

    I have a value of energy for a meal in kJ. How do I convert this into grams please?

    asked by Sarah on January 10, 2008
  30. science

    what is the flow of matter and energy is it waves

    asked by mary on April 16, 2010
  31. Earth Science

    How energy flows through the Earth's system.

    asked by Jacob on September 30, 2012
  32. Science(Help NOW, Pls)

    how is solar energy used in space and for what purpose?

    asked by GirlSense on December 15, 2010
  33. ap chem

    how would you calculate the bond energy of 2h2o2?

    asked by sara on November 15, 2007
  34. Chemistry

    what is the outer energy level for beryllium?

    asked by Sandy on November 30, 2010
  35. Chemistry

    Which of the following elements has the smallest ionization energy? A. F B. Be C. B D. Mg E. C

    asked by Lauren on November 19, 2007
  36. Geography

    how would you compare and contrast the various sources of energy? ..Need help with this Thanks -MC

    asked by mysterychicken on October 23, 2009
  37. chemistry

    How much energy is absorbed to change 7.25 g of ice at -3 C to 25.5C?

    asked by chris on January 25, 2016
  38. Science

    How is solar energy used in space? (for what purpose?)

    asked by The Official Pancake Queen on December 15, 2010
  39. science

    why does electric loose energy when it is being transmitted

    asked by Anonymous on February 26, 2008
  40. Science(URGENT)

    How is solar energy used in space? (for what purpose?)

    asked by The Official Pancake Queen on December 15, 2010
  41. Chemistry

    What is the energy of a mole of UV photons having a wavelength of 11 nm?

    asked by Kaleen on January 24, 2012
  42. home economics

    explain the term energy balance

    asked by josie on January 4, 2010
  43. Energy

    Hi guys can someone help on energy like give me a few bulletpoint about it please

    asked by Dhiraj Khullar on May 3, 2012
  44. 6th grade

    What are the 5 energy changes when a person jumps upward?

    asked by Michelle on December 1, 2010
  45. Chemistry

    How much energy is released when 44.5 of water freezes?

    asked by Delia on September 15, 2010
  46. science

    What 2 types of electromagnetic energy have wavelenghts of 0.76 cm?

    asked by Anonymous on February 3, 2009
  47. chemistry

    if 7 moles O2 are used, houch energy is produced?

    asked by bob on April 30, 2014
  48. eath science

    is moon a source of earth's energy?

    asked by Jacob on September 30, 2012
  49. Science

    How much energy is given out whwn 1g of methane burns

    asked by Chioma on January 19, 2018
  50. biology

    CUM ON PLEASE SOME 1 TELL ME DA BIG IDEA OF ENERGY

    asked by tash on November 16, 2008
  51. science

    Earthquake energy travels through rock as?

    asked by Anonymous on January 31, 2013
  52. Science

    What happens to energy and matter during a chemical reaction?

    asked by Pickle on May 16, 2016
  53. science

    what is the substance that is used in all cells to release energy from

    asked by tony on November 28, 2007
  54. chemistry

    How much energy is released when 48.5 g of water freezes?

    asked by re on September 6, 2009
  55. Chem 111

    How many grams of N2(g) would have to react to produce 19.5 kJ of energy

    asked by Rachel on February 23, 2015
  56. chemistry

    q4 What element has the greatest first ionization energy? Li Na K Rb Cs

    asked by danny on April 27, 2015
  57. Chemistry

    Calculate the wavelength of a proton with energy 2.45 eV.

    asked by Anon on September 15, 2013
  58. Chemistry

    Among the following, which element has the lowest ionization energy? A. Na B. Cl C. Cs D. I

    asked by Jake on November 8, 2013
  59. Science Help. Thank You! (:

    What are the three of the most widely used energy sources in California?

    asked by ilovelasagna on June 15, 2015
  60. science

    can any of you tell me some good information about solar energy

    asked by Cierra on March 28, 2014
  61. Biology

    does energy and matter cycle through an ecosystem

    asked by jake on January 21, 2010
  62. science

    where does the energy source come from, is it easy to obtain, etc?

    asked by susan on November 30, 2009
  63. science

    can any of you tell me some good information about wind energy

    asked by Cierra on March 28, 2014
  64. science

    can anyone give me examples of energy intercoversions please

    asked by paul on December 5, 2010
  65. SCI 275

    what ultimately happens to all the absorbed solar energy?

    asked by dawn on November 28, 2007
  66. college physics

    As wavelengths decreases, energy _____.

    asked by Cristina on July 31, 2010
  67. physical science

    what does the law of conservation of energy state

    asked by leann on May 15, 2008
  68. Health Physics

    Why is the property of energy so important in nature?

    asked by Shannon on January 22, 2010
  69. science

    What is energy flow? Why is it important? (Use the cow as your example)

    asked by Anonymous on November 26, 2012
  70. biology

    90% if the released energy during the Krebs Cycle comes from what

    asked by Alex on April 6, 2013
  71. Science

    Which statement is true regarding nuclear energy?

    asked by Marie on October 27, 2013
  72. science

    heat energy is measured in unites of

    asked by diane on August 25, 2012
  73. Science

    What are 2 things that electrical energy can transform into?

    asked by Saiyda on March 25, 2010
  74. chem

    what is a potential energy curve and how do you know where to label Ea, and ƒ´H??

    asked by Sara on May 15, 2011
  75. Science

    What's a benefit and risk of nuclear energy?

    asked by Cassidy on January 16, 2013
  76. Science

    Where, in Nevada, is wind energy produced? THANKS!

    asked by Mariz on April 10, 2009
  77. science

    what is the big idea of energy transfer

    asked by kiko on November 28, 2009
  78. chemistry

    How does the spin of an electron affect its energy?

    asked by ana on November 28, 2009
  79. physical science

    what is the formula for gravitational potential energy?

    asked by leann on May 15, 2008
  80. Science

    Could mechanical energy be when you throw something? Pleaseeee help me.

    asked by Angie Please Help Me! on January 21, 2013
  81. science

    If water boils does it transmit energy

    asked by Anonymous on April 20, 2010
  82. sci207: dependence of man on the environment

    Which statement is true regarding nuclear energy

    asked by Anonymous on March 9, 2015
  83. physics

    Which part of a wave relates to its energy ?

    asked by brandy on July 5, 2012
  84. Conserving energy

    What are 5 ways I can conserve energy in my community?

    asked by Connexus on April 20, 2018
  85. Physics

    What are the three factors on which thermal energy depends?

    asked by SMK on February 10, 2012
  86. ap chem

    how would you calculate the bond energy of 2h2o2?

    asked by sara on November 15, 2007
  87. science

    why the unit of work and energy are equal?

    asked by puja on July 21, 2016
  88. bio II

    The molecule that provides energy for active transport is?

    asked by jake on March 5, 2008
  89. science

    what is thermal energy plz help me stuck!

    asked by Alex on January 29, 2009
  90. PHSC

    Which part of a wave relates to its energy ?

    asked by brandy on July 5, 2012
  91. science

    Conversion of energy from one form to another usually releases what

    asked by Chris on January 25, 2017
  92. chemistry

    what is energy and use the electromagnetic spectrum to explain it.

    asked by jill on October 11, 2009
  93. science

    what is energy,and use the electromagnetic spectrum to explain it.

    asked by Sam on October 11, 2009
  94. chemistry

    Calculate the wavelength of a proton with energy 2.45 eV.

    asked by adex on February 25, 2013
  95. science

    4 answers energy flow in ecosystem?

    asked by sadie on November 21, 2014
  96. Physics (easy level)

    What would a Potential energy to velocity^2 graph be?

    asked by Manny on December 17, 2012
  97. chemistry

    What do the values or R, G, and B mean in terms of the energy of light.

    asked by Chayanne Hyde on November 1, 2010
  98. Science

    what kind of energy is stored before the earthquake

    asked by Anonymous on May 14, 2013
  99. science

    a1.5m high has a potential energy of 44.1 what is the mass

    asked by gina on July 7, 2017
  100. physics

    Internal energy for real gas

    asked by Anonymous on November 11, 2017

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