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A person with a remote mountain cabin plans to install her own hydroelectric plant. A nearby stream is 3.00 m wide and 0.500 m deep. Water flows at 1.20 m/s over the brink of a waterfall 5.00 m high. The manufacturer promises only 25.0% efficiency in converting the potential energy of the water-Earth system into electric energy. Find the power she can generate. (Large-scale hydroelectric plants, with a much larger drop, are more efficient.)
the top surface of the passenger car of a train moving at a velocity of 70 kmh is 2.8 m wide and 8 m long heat transfer
An Olympic long jumper is capable of jumping 7.6 meters. Suppose that his horizontal speed is 8.5 m/s as he leaves the ground. Evaluate how high does he go
The density of ice is 917 kg/m^3, and the density of sea water is 1025 kg/m^3. A swimming polar bear climbs onto a piece of floating ice that has a volume of 5.2m^3. What is the weight of the heaviest bear that the ice can support without sinking com..
The sound level of a single vacuum cleaner is about 75dB and a television is about 55dB. What is the sound level number
What is the new momentum of the puck. What is the length of pipe.
The position of a particle moving along the x axis is given by x = (32 + 40t - 8.0t2) m, where t is in s. What is the average velocity during the time interval t = 1.0 s to 3.0 s?
A large cruise ship of mass6.70107kg has a speed of10.8m/s at some instant. What is the ship's kinetic energy at this time
you are driving through town at 13.5 ms when suddenly a ball rolls out in front of you. you apply the brakes and begin
An electron is accelerated across an electric field that has a potential dissimilarity of 30 V. After exiting the electric field, the electron enters a magnetic field and is soon to be on a curved path that has a radius gauged to be 6.0 mm. assuming ..
A projectile is launched with an initial velocity of 50 m/s at a launch angle of 30 degrees with respect to the horizontal. What is the magnitude of the projectile's velocity at t = 4s
Bob is strapped to a board that is moving so that ? along the length of the board is 2.0. The board and direction of relativistic motion is along the horizontal. You are standing next to a hole on a horizontal platform that he hopes to pass throug..
What is the magnitude of the net force on the student. A student who weighs 470N is wearing a backpack that weighs 84N. The student is standing still on level ground.
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