Wind turbine B has blades twice as long as wind turbine A. If they are subjected to the same wind, what is the relationship between the power from turbine A (PA) and the power from turbine B (PB)?

The Power output from Turbine B with the doubled blade will be X4 of the power output from Turbine A.

Explanation:

The Power generated by a wind turbine is governed by the equation:

P=0.5ρAV³

Where ρ= Air Density

A= Swept Area of the Blade =πr²

V= Wind Velocity

If they are subjected to the same wind, Air Density and Wind Velocity will be equal

For both turbines,

Let Air Density=1

Wind Velocity=1

Power from Turbine A = 0.5X1XπX1²=0.5π

Power from Turbine B (radius=2) = 0.5X1XπX2²=2π

Power from Turbine B/Power from Turbine A = 2π/0.5π=4

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

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