A pumped-storage reservoir sits 144 m above its generating station and holds 7.0×109 kg of water. The power plant generates 341 MW of electric power while draining the reservoir over an 6.1 h period. What fraction of the initial potential energy is lost to nonconservative forces (i.e., does not emerge as electricity)?

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Q: A bungee jumper jumps off a bridge and bounces up and down several times. She finally comes to rest…

A: The energy stored in the spring is  U = 0.5 K y2 where, K is the spring constant and y is the…

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A: Given: The mass of the object is 29 kg. The height of the object is 200 m. The time interval is 45…

Q: A 120 g arrow is shot vertically from a bow whose effective spring constant is 430 N/m. If the bow…

A: Given Data Mass of the arrow is m= 120 g=120 g×1 kg1000 g=12×10-3 kg Spring constant is k=430N/m The…

Q: 3.3 A 1500-kilogram race car can go from zero to 90 km/h in 5.0 sec. What average power is required…

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Q: A 3kg mass starts from rest and slides a distance d down a frictionless 30° incline (see the…

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Q: A 0.150 kg block of ice is placed against a horizontal, compressed spring mounted on a horizontal…

A: Given data The mass of the block is m=0.150 kg The height of the table is h=1.20 m The spring…

Q: 14. Calculate the total work done by the system from z, = 1.40 m to a; = 4.80 m when force applied…

A: Given data: The initial position of the system is, xi = 1.40 m The final position of the system is,…

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A: In this question we use power equation with speed and force.

Q: A block of mass 250.0 g is placed on top of a light vertical spring of constant k = 4.80 x 103 N/m…

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Q: During a crash test, a 900kg car moving at 25 m/s hits an uncompressed horizontal spring with a…

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Q: When an 85.4-kg adult uses a spiral staircase to climb to the second floor of his house, his…

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Q: To what maximum height above the point of release does it rise?

A: The maximum height attained by the block can be determined by the conservation law of energy as,…

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A: The conservation of energy states that initial energy of the snowball is equal to the final energy…

Q: A block of mass 250.0 g is placed on top of a light vertical spring of constant k = 4.80 x 10 N/m…

A: The correct option is B. When the spring its compressed by 6.6 cm (=0.066m), the potential energy…

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Q: A 1.65 kg block slides with a speed of 0.885 m/s on a frictionless horizontal surface until it…

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Q: A block of mass 165 grams is placed on top of a light vertical spring, which is compressed by 7.25…

A: Given Mass of the block is m=165 g=165×10-3 kg Compression of the spring is ∆x=7.25 cm=7.25×10-2 m…

Q: A block of mass 0.250 kg is placed on top of a light vertical spring of force constant 5 000 N/m and…

A: Using law of conservation of energy, the expression for find maximum height is…

Q: 13)? 30° P 20 8.0m An external torce F-130 Wis applied ata downward 0=30° to Surface. The force acts…

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Q: How high does it rise above the point of release?

A: By using the principle of conservation of energy 1/2 kx²= mgh k=5483 N/m m= 2.236kg x= 0.142m…

Q: A linear spring has a free length of 33 cm.  When it is under a  hanging load of 29802N, its total…

A: The given values are, l0=33 cm=0.33 mF=29802 Nl=1006.3 cm=10.063 ml'=1585.2 cm=15.852 m

Q: The Grand Coulee Dam is 1270 m long and 170 m high. The electrical power output from generators at…

A: Solution: Determine the electric power produced per cubic meter of water due to potential energy.…

Q: A linear spring has a free length of 34.4 cm. When it is under a hanging load of 41333N, its total…

A: free length (L) = 34.4 cm  = 0.344 m hanging load = 41333 N total length = 788.7 cm  = 7.887 m…

Q: When a car of mass 1167 kg accelerates from 10.0m / s to a certain final speed, 4.00x10 ^ 5J of work…

A: Given Mass m = 1167 kg Initial velocity u = 10 m/s Work done = 4 × 105 J

Q: Find his power output, in watts, for the work he does against the gravitational force and air…

A: a) Analyze the following figure. Since the skier is moving at a constant speed, its acceleration…

Q: A block of mass 250.0 g is placed on top of a light vertical spring of constant k = 4.80 x 103 N/m…

A: Mass of the block is m = 250 g = 0.25 kg Spring constant is k = 4.80×103 N/m The spring is…

Q: A box of mass  m = 2.20 kg  is dropped from rest onto a massless, vertical spring with spring…

A: according to the conservation of energy, Kf-Ki+Uf-Ui=0                               1

Q: What average mechanical power (in W) must a 70.5 kg mountain climber generate to climb to the summit…

A: Write the given values with suitable variables. m=70.5 kgh=305 mt=47 min=47×60 s=2820 s Here, m, h,…

Q: A 4 kg particle has an initial velocity of (6i-3j) m/s. Some time later, its velocity changes to…

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Q: A 40.0-kg box initially at rest is pushed 5.00 m along a rough, horizontal floor with a constant…

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Q: A hurricane wind blows across a 8m x 17m flat roof at a speed of 135  km/h.  Calculate the force…

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Q: A spring with k = 15 N/m with equilibrium length 30 cm is attached vertically to a surface and then…

A: Spring constant (k) = 15 N/m mass (m) = 0.2 kg Equilibrium length = 30 cm

Q: The human heart is a powerful organ. If your heart can take in and discharge about 7040.9 liters of…

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Q: A pitcher supplies a power of P = 226 W to a baseball of mass m = 0.085 kg for a period of t = 0.28…

A: Given value--- power = 226 W. mass = 0.085 kg. time = 0.28 sec. We have to find--- What is the…

Q: Mickey, a daredevil mouse of mass 21.3 g, is attempting to become the world's first "mouse…

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Q: Water flows over a section of Niagara Falls at a rate of 1.30 × 106 kg/s and falls 52.0 m. What is…

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