A 50 kW wind turbine operates at peak efficiency when the wind blows at 26 miles per hour . At this rate , it reaches 62 % of the Betz limit . What is the coefficient of power for this wind turbine ?

Q: A volcano spews a 350kg rock vertically upward to a height of 550m. (a) With what velocity was the…

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Q: Expending 1500 J of energy by running up the stairs for 40 seconds will generate the same amount of…

A: Energy in general is defined as “the ability to do work” where “work” is defined as the action of a…

Q: A skier slides straight down an incline of 25 degrees without using her poles.  The slope itself is…

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Q: If the power generated by a wind system at a height of 50 m is equal to 30 kw at a wind speed of 4…

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Q: A certain rain cloud at an altitude of 2.04 km contains 3.20 x 10' kg of water vapor. How long would…

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Q: PHYS-91; Multiple Choice: A 10,000-watt motor operates an elevator weighing 5000 newtons. Assuming…

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Q: TYPE YOUR ANSWER. You are doing work at a rate of 85 W in a rowing machine. Calculate the force (in…

A: Power, P = 85 W Distance, s = 1.5 m Time, t = 1.2 s   Power = Work / Time or P = W/t or P = Fs/t or…

Q: 1. A 4kg ball is launched into the air from the ground with a speed of 18m/s. At the top of its arc,…

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Q: Situation 4: A ski starts from rest and slides down a 28° incline 85 m long. 23. If the coefficient…

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Q: A child whose weight is 290 N slides down a 4.6 m playground slide that makes an angle of 45 with…

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Q: Location Height(m) Start A B C D E F 40.0 25.0 28.0 12.0 6.0 14.0 0 PE(J) KE(J) III Energy 0…

A: Given:-  The mass of the roller coaster is m = 400 kg  The height of the roller coaster is h = 40 m…

Q: ome runners train with parachutes that trail behind them to provide a large drag force. These…

A: Given: Side of a square shaped expansion of parachute a = 1.8 m. Drag Coefficient CD=1.4 Velocity of…

Q: Two Engines, A and B, can do the same amount of work. However, A has a greater power rating than B.…

A: Solution: Work is the amount of energy transferred in a process when an external force is applied.…

Q: The car is driving on the highway at a speed of 108 km/h. Air resistance force is 0.40 kN. How much…

A: Here given a car is driving with a speed 108km/h. Air resistance is .40kN. We have to calculate the…

Q: #13

A: 9)the power is the energy per unit time or work done per unit time. the work is to be done to rise…

Q: (c) The work done by friction is O positive. O negative.

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Q: Questions 1. To increase his speed from 20 km/h to 30 km/h, the cyclist must produce an additional…

A: Power is defined as the energy transferred to system per unit time.

Q: A car with a sleeping person inside sits at the top of the hill when suddenly it begins to roll down…

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Q: A windmill captures 300W of wind power for 9h. The kinetic energy is converted to electric energy…

A: Given a windmill captures 300W of wind power for 9h. The kinetic energy is converted into electrical…

Q: Don't use chat gpt

A: We can solve this problem using the principle of conservation of mechanical energy, which states…

Q: List the energy conversions that occur when riding a bicycle.

A: In riding a bicycle

Q: rate of 85 W in a rowing machine. Calculate the force (in N) you exerted on the handle when each…

A: Power is the rate at which work is done.  Power = Work / Time But, Work = Force × Distance Hence,…

Q: The mechanical power of a cyclist pedaling at a constant speed of 7.5 m / s is 152 W. d) what is…

A: Power  P = F.v  Since, F=v(dm/dt)  P = v2(dm/dt)

Q: A 25.0 kg child slides down a long slide in a playground. She starts from rest at a height h₁ of…

A: Given data:  Mass (m) = 25.0 kg At Height (h1) = 22.00 m, speed (V1) = 0 m/s At height (h2) = 12.00…

Q: Lli 5 In unloading grain from the hold of a ship, an elevator lifts the grain through a distance of…

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Q: A 88 kg block is pulled at a constant speed of 5.9 m/s across a horizontal floor by an applied force…

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Q: The given on kinetic energy is really like that.

A: Since the work done to move a charge particle from A to B is, Wext = 15 x 104 J initial kinetic…

Q: A small car and a semi-truck have the same total mechanical energy. Which of the following CANNOT be…

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Q: A 55 kg child is swinging on a swing with length 4.0 m. When the child stops at the top of its…

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Q: Energy

A: Definition of Conservation of Energy : - Total energy is constant in any process. It may change in…

Q: ric power companies use water to store energy. umped from a low reservoir to a high reservoir. he…

A: Given information: Here, P is the power, h is the height and ρ is the water’s density.

Q: You give a 5.0 kg box a quick shove up a ramp. It reaches a vertical height of 3.0 m before…

A: m = 5 kg h = 3 m vf = 0 m/s (Eth)f = 100 J g = 10 m/s2

Q: Q9. A 100 kW wind turbine operates at peak efficiency when the wind blows at 15.0 m/s At this rate,…

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Q: In a hydroelectric dam, water falls 35.0 m and then spins a turbine to generate electricity. What is…

A: (a)The in potential energy of the water that falls from height h0 is.

Q: Situation 2: A crate of mass 10.0 kg is pulled up a rough incline with an initial speed of 1.50 m/s.…

A: Concept: Given: Mass of Crate (m)=10 kgInitial Speed= 1.50 m/sPulling Force =100 NInclination Angle…

Q: Provide FBD, Given, Required, and Solution while answering the Questions. 1. Killer whales are known…

A: Part (1) Given:-           Mass of killer whale Shamu (mw) = 8000 kg          Initial velocity of…

Q: Question 4 How much power is required to lift a heavy solid concrete beam with mass 119.69 kg upward…

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