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A typical propeller of a turbine used to generate electricity from the wind consists of three blades as in the figure below. Each blade has a length of L = 33 m and a mass of m = 415 kg.

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  1. PHYSICS HELP!

    A typical propeller of a turbine used to generate electricity from the wind consists of three blades as in the figure below. Each blade has a length of L = 33 m and a mass of m = 415 kg. The propeller rotates at the rate of 21 rev/min. 120degree angle
  2. trigonometry

    a wind mill is used to generate electricity. the wind mill has propeller blades that are 12 feet in length. if the propeller is rotating at 3 revolutions per second, what is the linear speed in feet per seconds of the tips of the blades?
  3. algebra

    Wind farms are a source of renewable energy found around the world. The power P(in kilowatts) generated by a wind turbine varies directly as the cube of the wind speed v(in meters per second) If a turbine generates 700kW in a 5m.s wind, how much power does
  4. algebra

    Wind farms are a source of renewable energy found around the world. The power P(in kilowatts) generated by a wind turbine varies directly as the cube of the wind speed v(in meters per second) If a turbine generates 500kW in a 10m/s wind, how much power
  5. Algebra2

    Wind farms are a source of renewable energy found around the world. The power P (in kilowatts) generated by a wind turbine varies directly as the cube of the wind speed v (in meters per second). If a turbine generates 500kW in a 10m/s wind, how much power
  6. Physics

    In a hydroelectric dam, water falls 26.0 m and then spins a turbine to generate electricity. What is ∆U of 1.0 kg of water? Suppose the dam is 80% efficient at converting the water's potential energy to electrical energy. How many kilograms of water must
  7. Biology honors (High School)

    How does a turbine generate electricity?
  8. College Physics

    In Chapter 3 we learned that the force of air drag on an object moving rapidly through the air is proportional to v2, where v is the speed of the ball relative to the air. The same relation applies to the force of the wind on the blades of a wind turbine
  9. Physics

    1.) A lawnmower engine claims to provide 18 hp of power and 6.25 ft lb of torque. If this is true, what must be the rotational speed in RPM? 2.) The conversion of the shaft power of a wind turbine to electricity is the function of the generator. Assume it
  10. Physics

    1.) A lawnmower engine claims to provide 18 hp of power and 6.25 ft lb of torque. If this is true, what must be the rotational speed in RPM? 2.) The conversion of the shaft power of a wind turbine to electricity is the function of the generator. Assume it
  11. phy

    A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.130 rad/s2. After making 2844 revolutions, its angular speed is 136 rad/s. (a) What is
  12. Physics

    A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration of 0.180 rad/s2. After making 2874 revolutions, its angular speed is 139 rad/s. A. What is
  13. physics

    A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.170 rad/s2. After making 2870 revolutions, its angular speed is 131 rad/s. (a) What is
  14. Physics

    A wind turbine rotates at 8.40 rpm and has an angular acceleration of 0.0326 rad/s2. If the wind turbine takes 27.0 s to come to a complete stop, how many revolutions will this take?
  15. physics

    A wind turbine rotates at 15.1 rpm and has an angular acceleration of 0.0659 rad/s2. If the wind turbine takes 24.0 s to come to a complete stop, how many revolutions will this take?
  16. Physics

    A typical coal-fired power plant burns 310 metric tons of coal every hour to generate 790 MW of electricity. 1 metric ton= 1000 kg. The density of coal is 1500 {\rm kg}/{\rm m}^{3} and its heat of combustion is 28 \;\rm MJ/kg. Assume that all heat is
  17. Chemistry

    Suppose a fuel-cell generator was used to produce electricity for a house. If each H2 molecule produces 2e- how many kilograms of hydrogen would be required to generate the electricity needed for a typical house? Assume the home uses about 850 kWh of
  18. chemistry

    Suppose a fuel-cell generator was used to produce electricity for a house. If each H2 molecule produces 2e- , how many kilograms of hydrogen would be required to generate the electricity needed for a typical house? Assume the home uses about 850 kWh of
  19. Chemistry

    Suppose a fuel-cell generator was used to produce electricity for a house. If each H2 molecule produces 2e-, how many kilograms of hydrogen would be required to generate the electricity needed for a typical house? Assume the home uses about 850 kWh of
  20. chem

    Suppose a hydrogen-oxygen fuel-cell generator was used to produce electricity for a house. Use the balanced redox reactions and the standard cell potential to predict the volume of hydrogen gas (at STP) required each month to generate the electricity
  21. ap physics

    A Verdant Power water turbine (a "windmill" in water) turns in the East River near New York City. Its propeller is 2.5 m in radius and spins at 32 rpm when in water that is moving at 2.0 m/s. The rotational inertia of the propeller is approximately 3.0
  22. Chemistry

    Suppose a hydrogen-oxygen fuel-cell generator was used to produce electricity for a house. Use the balanced redox reactions and the standard cell potential to predict the volume of hydrogen gas (at STP) required each month to generate the electricity
  23. phyics

    A Verdant Power water turbine (a "windmill" in water) turns in the East River near New York City. Its propeller is 2.5 m in radius and spins at 32 rpm when in water that is moving at 2.0 m/s. The rotational inertia of the propeller is approximately 3.0
  24. science

    A group of wind turbines operates in an open field. Which statement about the wind turbines is true? Answer A. The wind turbines produce movement of air that does work. B. The wind turbines do work by using electricity to produce power. C. The wind
  25. Environmental Science

    True or False: 28. Hydroelectric energy is produced by flowing water turning a turbine which generates electricity. TRUE 32. Geothermal energy is generated when heated water or steam is pumped up from inside the Earth to power a turbine that generates
  26. Physics

    he United States is currently considering standards to generate 20% of its electricity from renewable resource in the next 15 years. If this power is generated by wind turbines that generate 3 MW each, how many turbines will need to be installed in the
  27. IB Physics

    a wind turbine has a power output p when the wind speed is v. The efficiency of the turbine does not change. What is the wind speed at which the power output is p/2 I know the answer is v/cube root of 2 but I don't know how to get that answer. Can you show
  28. ELA

    Hello! I just wanted to double check my answer to see if I am thinking correctly. Read this passage: The principle of the mercury boiler is the utilization of mercury between the fire and the under-boiler surface exposed to the flame — the mercury, when
  29. Physics

    The average wind speed at a height of 80m over the North Sea is estimated to be about 9 m/s. Norway plans to build a 10-MW wind turbine in the North Sea, which will have blades of diameter 145m producing an average of 3 MW of power. Calculate the
  30. physics help please

    You want to use a windmill to generate electricity for your home. You decide to use Earths magnetic field which has a horizontal component B=10^-4 T to an induce emf. You design a conduction loop with 200 turns and surface area of 0.1m^2. The rod is 0.5m
  31. science

    Electromagnetic generators generate electricity. Events that occur to generate electricity are listed below. What is the correct order of events? A. The initially stationary electrons in the wire experience a force. B. The conducting coil rotates. C. The
  32. Geometry

    Stephanie casts a shadow of 1.2m and she is 1.8m tall. A wind turbine casts a shadow of 10m at the same time that Stephanie measured her shadow. Draw a diagram of this situation and then calculate how tall the wind turbine is.
  33. Maths

    Stephanie casts a shadow of 1.2 m and she is 1.8 m tall. A wind turbine casts a shadow of 10 m at the same time that Stephanie measured her shadow. Draw a diagram of this situation and then calculate how tall the wind turbine is.
  34. Physics

    How can the more wind speed and force, results greater amount of power for the wind turbine?
  35. science

    what is the electrical output of a wind turbine with a diameter of 25metres when the wind speed is 10 metres per second?
  36. science

    Which statement correctly identifies the relative levels of kinetic and potential energy in a hydroelectric dam? A. Kinetic energy is highest at the bottom; potential energy is highest at the top.****** B. Kinetic and potential energy are both highest at
  37. Chem

    The best solar panels currently available are about 13% efficient in converting sunlight to electricity. A typical home will use about 40. kWh of electricity a day. Assuming 8 hours of useful sunlight per day, calculate the minimum solar panel surface area
  38. Science (Please check my answers)

    1) Which statement correctly identifies the relative levels of kinetic and potential energy in a hydroelectric dam?(1 point) Kinetic and potential energy are both highest at the top. Kinetic energy is highest at the top; potential energy is highest at the
  39. physics

    if a electricity genreter move with the speed of 60km/h how much electricity they generate in 1 minute in volt
  40. Science

    A project demand for electricity is 25,000MW in a year. Estimate the following: The electricity is produced by a big hydroelectric station and the water level in the 10m deep reservoir is allowed to fall 100m to generate the electricity. How many square
  41. Physics

    A wind turbine has blades that sweep an area of 2000m2. It converts the power available in the wind to electrical power with an efficiency of 50%. What is the electrical power generated if the wind speed is 10ms–1? (The density of air is 1.3 kg m–3.)
  42. Science

    how is the electricity in our light bublbs formed. Ex. buring coal?????? Electricity is attracted to the wires of the light so it is attracted to the bulb Huh? Electricity is generated by spinning the rotor inside a generator. the rotor (called this
  43. Solar energy

    The worldwide installed wind power in 2012 was 280GW . Assume that the total electricity generation worldwide is 20200TWh per year, and a capacity factor for wind power of 30% . What percentage of the total electricity generation worldwide was covered by
  44. 8th Grade Algebra

    I don't know how to do these types of problems whatsoever. 1) It takes a small jet plane 4 hours less time than it takes a propeller-driven plane to travel from Glen Rock to Oakville. The jet plane averages 637 km/h while the propeller plane averages 273
  45. Math

    2. A propeller on a gas turbine rotates 64° every 2.70 minutes. What is the angular velocity in rev/s? What is the linear speed of a point at the tip of the blade if the diameter of the blade is 5.37 ft?
  46. Physics

    An airplane propeller is 1.1 m in length (from tip to tip) and has a mass of 2.8 kg . When the airplane's engine is first started, it applies a constant torque of 8.1 N⋅m to the propeller, which starts from rest. What is the angular acceleration of the
  47. Science

    Which of the following is not part of the process of producing electricity from coal? 1. Coal is lifted onto a platform to give it potential energy before burning. 2. Coal must be burned to release heat. 3. Heating water produces steam. 4. Steam runs a
  48. heat

    the main purpose of the turbine in the turbojet engine is to? The turbine rotates the compressor, compressing the inlet air. Often, electrical generators and hydraulic pumps are attached to the turbine via gears also. drive the compresser
  49. English

    1. He died young. 2. He died when he was young. 3. When he was young, he died. (Are they all the same?) 4. a strong wind, a high wind, a heavy wind, 5. a weak wind, a low wind a light wind, a gentle wind 6. a warm wind, a chill wind, a chilly wind, a
  50. Science

    Please don't say this is to difficult to do or its o hard. Just tell me how to do it. I wanna amke a model in whihc electricity is generated through wond. ;) Check these sites for instructions about how to generate electricity with wind.
  51. Physics

    steam enters a turbine with a velocity of 16m/s and enthalpy 2950kj/kg . the steam leaves turbine with a velocity 32m/s and specific enthalpy 2539kj/kg. the heat lost to the surroundings as the steam passes through the turbine Is 25kj/kg . the steam flow
  52. HEEEEEEELP

    HI I have no idea what's Alternative energy source . Can anyone help me in giving me a defintion for it thanx An alternative energy source is an additional one that is not being used already. It depends on what source is predominant or currently being
  53. physics

    The propeller blades of an airplane are 2.7 m long. The plane is getting ready for takeoff, and the propeller starts turning from rest at a constant angular acceleration. The propeller blades go through two revolutions between the fifth and the ninth
  54. Physics

    The propeller blades of an airplane are 2.4 m long. The plane is getting ready for takeoff, and the propeller starts turning from rest at a constant angular acceleration. The propeller blades go through two revolutions between the fifth and the seventh
  55. Physics

    The propeller blades of an airplane are 2.4 m long. The plane is getting ready for takeoff, and the propeller starts turning from rest at a constant angular acceleration. The propeller blades go through two revolutions between the fifth and the seventh
  56. algebra

    suppose the polynomial function below represents the power generated by a wind turbine where x represents the wind speed in meters per second and y represents the kilowatts generated interpret f(10) f(x)=0.08x^3+x^2+x+0.26
  57. algebra

    suppose the polynomial function below represents the power generated by a wind turbine where x represents the wind speed in meters per second and y represents the kilowatts generated interpret f(10)
  58. Chemistry

    Which of these is more efficient on a large/small scale (power generation) and why? burning hydrogen to generate heat to drive turbines to produce electricity or directly producing electricity in a fuel cell reaction Can hydrogen be piped into homes,
  59. Science

    I want to make a small model of how electricity is created by burning coal. I want to show a model that works and be able to light up and very small light bulb(the ones found in an average school microscope). How would I do this. You will find this
  60. PHYSICS

    In a power plant the high pressure turbine trips due to an unauthorised valve shutdown. What are a) what is the angular acceleration of the turbine blade? b) what is the distance travelled by a point on the rim of the turbine blade during the acceleration?
  61. PHYSICS

    In a power plant the high pressure turbine trips due to an unauthorised valve shutdown. What are a) what is the angular acceleration of the turbine blade? b) what is the distance travelled by a point on the rim of the turbine blade during the acceleration?
  62. PHYSICS

    In a power plant the high pressure turbine trips due to an unauthorised valve shutdown. What are a) what is the angular acceleration of the turbine blade? b) what is the distance travelled by a point on the rim of the turbine blade during the acceleration?
  63. Science**updated asnwers**

    5.B 6.A 7.C 8.D 9.A 11.D 13.D 5. Which of the following types of pollution cannot be attributed to car and truck emissions? A. acid rain B. sedimentation C. ozone D. photochemical smog 6. Which of the following is a source of photochemical smog? A. fossil
  64. Science/English

    According to Al Gore in An Inconvenient Truth, how is wind power beneficial in the fight against global warming? a.) it uses wind panels to trap the power of the wind b.) it emits water vapor, which cools the atmosphere c.) it creates a vast amount of
  65. physics

    If an airplane propeller rotates at 1570 rev/min while the airplane flies at a speed of 333 km/h relative to the ground, what is the linear speed of a point on the tip of the propeller, at radius 1.97 m, as seen by (a) the pilot and (b) an observer on the
  66. physical

    Part A Each blade on a wind turbine is engineered to produce an effective force through its center of mass that is perpendicular to its long axis. (Part A figure) The magnitude of the force produced by each blade in a wind of speed v is F=(40.0~{\rm
  67. Math

    The amount of a monthly electric bill (B, measured in $) depends on the amount of electricity used that month (E, measured in kWh). A typical public utility charges $0.12 per kWh for the first 300 kWh used, $0.17 per kWh for the next 600 kWh used, and
  68. physics

    an airplane propeller slows from an initial angular speed of 12.5rev/s to a final angular speed of 5rev/s during the process the propeller rotates through 21 rev. find the angular acceleration of the propeller if in radians per second squared, assuming its
  69. Phyical Science

    how do we use natural gas to generate electricity?
  70. English

    Can you please tell me if the following sentences are possible? Thank you very much. 1) A trochee consists of a stressed syllable followed by an unstressed one. A trochee consists in a stress-unstress pattern. 2) The mirror is described as being
  71. Social Studies

    I need help studying, its the last day to study before I have a test. I have a B, I HAVE TO GET AN A (Otherwise I'll suffer one more year of 6th grade.) I saw these type of questions on the preview and I want to remember them. Will someone please help me?
  72. 3 science questions

    7. Which of the following is used to make biomass fuel? B. plants and animal waste C. coal
  73. Ship Hydrodynamics

    Show that Froude number of a propeller with diameter D [m] and shaft (propeller) rotational speed n [1/s] can be given as; Fr = (sqrt(D/g))1/n
  74. Physics

    Why is using mirrors to generate electricity not a common practice?
  75. physics

    Propeller blade in aeroplane is 2m long if propeller rotates 1800rev/min compute tangential velocity.
  76. Physics

    A propeller spins at 1880 rev/min. the equals 197 rads/sec b. What is the angular displacement of the propeller in 2.50 s ?
  77. physics

    The propeller of a plane rotate clockwise at 26900 rpm. What is the angular acceleration (in rad/s2) of the propeller if it takes 8.00 s to come to a standstill?
  78. SCIENCE

    Most electricity is produced using fossil fuels. Some people think electricity should be produced using resources such as wind,water,and solar energy. Why might people have this opinion?
  79. earth science

    of the three "local wind"(land and sea breezes, mountain and valley breezes, and chinook and santa ana winds)which do you think could be most easily harnessed for the generation of electricity by a huge wind farm? some important things to consider:strength
  80. Algebra 2

    Suppose the polynomial function below represents the power generated by a wind turbine, where x represents the wind speed in meters per second and y represents the kilowatts generated. Interpret f(10) f(x) = 0.08x^3 + x^2 + x + 0.26 _______________ Does
  81. Math

    Electric eel can generate 5 times the voltage contained in a domestic power outlet. If a power outlet can supply 120 volts of electricity, how many volts of electricity can be generated by 2 electric eels combined?
  82. Thermodynamics

    Consider 100 kg/s of steam expanding in a turbine. The inlet to the turbine is at 15 MPa, 500 degrees C. The steam expands to 0.01 MPa. The exit entropy is 6.200 kJ/(kg.K). Though the turbine is well insulated, at a place where the temperature is 127
  83. social studies

    what is the connection between arabs and electricity? can not think of any relation but oil to generate energy.
  84. Science

    Choose the natural source most used to generate electricity in the united states?
  85. science

    what energy source can generate most of my home's electricity day and night????
  86. Physics

    Water is falling on turbine at a rate of 6000 kg/min the height of fall is 100 m what is the power given to turbine?
  87. algerbra

    AN ORCHESTRA CONSISTS OF STRINGS INSTRAMENTS AND WIND INSTIMENTS IN A RATIO OF 9 TO 4. THERE ARE 91 STRINGS AND WIND INSTRUMENTS IN THE ORCHESTRA. hOW MANY STRING INSTRUMENTS ARE THERE? how many wind instruments? Use a system of equation to model each
  88. physics

    The drive propeller of a ship starts from rest and accelerates at 2.90×10-3 rad/s2 for 2.10×103 s. For the next 1.40×103 s the propeller rotates at a constant angular speed. Then it decelerates at 2.30×10-3 rad/s2 until it slows (without reversing
  89. physics

    The drive propeller of a ship starts from rest and accelerates at 3.00 10-3 rad/s2 for 2.05 103 s. For the next 1.75 103 s the propeller rotates at a constant angular speed. Then it decelerates at 2.30 10-3 rad/s2 until it slows (without reversing
  90. physics

    The drive propeller of a ship starts from rest and accelerates at 2.95 10-3 rad/s2 for 2.05 103 s. For the next 1.90 103 s the propeller rotates at a constant angular speed. Then it decelerates at 2.30 10-3 rad/s2 until it slows (without reversing
  91. English 8R - It Happened in the Country

    wind·mill A building with sails or vanes that turn in the wind and generate power to grind grain into flour. or Move (one's arms) around in a circle in a manner suggestive of the rotating sails or vanes of a windmill. i think it's the second one, am i
  92. Physics

    Q) Rows of wind-powered generators are used in various windy locations to generate electric power. Does the power generated affect the speed of the wind?Would Locations behind the windmills be windier if they weren't there? Dicuss in terms of energy
  93. Physics

    A turbine is spinning at 3600rpm . Friction in the bearings is so low that it takes 11min to coast to a stop. How many revolutions does the turbine make while stopping?
  94. English 4

    When the speaker of “Ode to the West Wind” speaks of the impulse of the wind’s strength, to what is he referring? A. the sound of the wind B. the force driving the wind forward C. the weakening of the wind D. the random nature of the wind’s
  95. Physics

    A turbine is spinning at 3600 rpm. Friction in the bearings is so low that it takes 15 min to coast to a stop. How many revolutions does the turbine make while stopping?
  96. mathematics - sinusoidal curves

    The propeller of a boat at dock in the ocean will rise and fall with the waves. On a particularly wavy night, the propeller leaves its resting position and reaches a height of 2m on the peaks of the waves and -2m in the troughs. The time between the peak
  97. Enviormental

    35. In two or three well-developed paragraphs, explain how fossil fuels are used to generate electricity in an electric power plant.
  98. College Physics

    On average, an electric water heater operates for 3.4h each day. If the cost of electricity is $0.3 kWh, what is the cost of operating the heater during a 30-day month? The power of a typical electric water heater is 4500 W. Cost= Dollars What is the
  99. Physics

    A turbine spinning with angular velocity w_0 rad/sec comes to a halt in T seconds. Find an expression for the angle delta theta through which the turbine turns while stopping.
  100. PHYSICS

    A steam turbine operates between hot and cold reservoir temperatures of 538.0 ¢XC and 92.1 ¢XC, respectively. If heat is supplied at a rate of 238.0 MW, what maximum amount of power could the turbine deliver?

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