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

ok

explanation:

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is