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A solar energy "farm" produces 1.0 MW of power for a small town. The solar cells used convert incoming solar energy to electricity with 25% efficiency. Assume that the average solar flux is 500 W/m2. What total area of solar cells is required?
A 340 kg piano slides 3.7 m down a 33° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.37.
Cowboy Joe wishes to shoot his assailant by ricocheting a bullet off the mirrored metal plate. To do so, should he simply aim at the mirrored image of his assailant.
a man has to install an instrument on top of the mast of his sailboat. He uses a boson's chair to hoist himself up. With what acceleration does the man move up
A mass m = 2.4 kg is at the end of a horizontal spring of spring constant k = 265 N/m on a frictionless horizontal surface. Calculate the angular frequency of the oscillation in rad/seconds
A 43.0kg seal at an amusement park slides from rest down a ramp into the pool below. what is the work done by kinetic friction
a partice moves along the path y=-0.090x^6(-7)meters with a constant speed of 4 m/s. assume dx/dt>_0. Determine the cartisian components of velocity and acceleration at x= - 2m
The light energy that falls on a square meter of ground over the course of a typical sunny day is about 20 MJ. The average rate of electric energy consumption in one house is 1.0 kW. Find the energy consumption and area required by the solar cell
What provided the added kinetic energy? None of these is correct. the momentum of the platform the man moving the weights further away from his body the man pulling the weights closer to his body
A long, solid insulating cylinder of radius R = 1 mm has a uniform volume charge density and a total linear charge density of Lambda = 3:610^ -9 C/m.
A railroad train is traveling at 30 m/s. The locomotive whistle emits a loud tone at frequency 440 Hz. what is the frequency of the sound heard by a stationary listener in front of the locomotive
The burning of gasoline in a car releases about 3 × 10^4 kcal/gal. If a car averages 43 km/gal when driving 90 km/h, which requires 20 hp, what is an efficiency of the engine under those conditions.
Two 2.1-cm-diameter electrodes with a 0.10-mm-thick sheet of Teflon between them are attached to a 9.0 V battery, What is the charge before the Teflon is removed
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