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Total required annual electrical energy output from the wind farm =120 TJ Max number of turbines for which there is space on the farm =20. Average annual wind speed at the site= 9.0 ms^-1
a) Deduce that the average power output required from one turbineis 0.19 MWb) Estimate the blade radius of the wind turbine that will give0.19 MW Power output. (density of air= 1.2 kg m^-3)
The bolts on a car wheel require tightening to the torque of 90 N•m. If a 30 cm long wrench is used, what is the magnitude of the force necessary when the force applied at 53° to the wrench.
A flat circular coil with 171 turns, a radius of 5.85E-2 m, and aresistance of 0.373 Ω is exposed to an external magnetic fieldthat is directed perpendicular to the plane of the coil.
A resistor of 2 ? and another of 3 ? are connected in parallel, and this combination is joined in series with a 4-? resistor across a battery. what is the potential drop across the 3-? resistor
They stick together after the collision and are going 10 m/s after the collision. If they skid for 6seconds before stopping, how far did they skid?
A 4 µF capacitor is charged to a potential di?erence of 14 V. What is the capacitance of the second capacitor
a car accelerates from 23 ms to 28 ms while travelling a distance of 1.97 m due to a 97800-n net force acting on it.
The left edge of the loop is on the y-axis.The x-dimension of the loop is 110 cm and the y-dimension is 40 cm. What is the magnetic flux through the loop
Communication satellites are placed in geosynchronous orbit, i.e., in circular orbit such that they complete one full revolution about the earth in one sidereal day.
An archeologist on a dig finds a fragment of an ancient basketwoven from grass. What is the age of the basket
Some good estimates about the human body can be made if it is assumed that we are made mostly of water. estimate the number of water molecules in that person
The solid fuel of a 300.kg rocket travelling at 1.64x10^4 km/h is ignited to correct the rocket trajectory in mid-flight to Mars. what is the acceleration of the rocket (in m/s^2) at the start of this burn
A square loop of wire surrounds a solenoid. The side of the square is 0.1 m, while the radius of the solenoid is 0.025 m. The square loop has a resistance of 30 W. The solenoid has 500 turns and is 0.3 m long. The current in the solenoid is increa..
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