Wind Power (Basics)

How much watts of power does the Earth receive from the sun?

• 1.74

• 1,740

• 1.74 x 10^7

• 1.74 x 10^17

How much percentage of this energy is converted to wind power?

• 2%

• 20%

• 20.2%

• 22.2%

Up to what altitude is the wind affected by the ground surface?

• 10 meters

• 100 meters

• 1000 meters

• 10,000 meters

What do you call the turning force of the turbine which acts on the rotor blades?

• centripetal force

• centrifugal force

• torque

• torch

What part of the turbine converts mechanical energy to electrical energy?

• rotor blades

• shaft

• gears

• generator

This is the element of wind power that deals with how heavy the air is.

• density of the air

• rotor area

• wind speed

• topography

This is the element of wind power that deals with the length and width of the blades.

• density of the air

• rotor area

• wind speed

• topography

Tags

NGSS.MS-ETS1-2

NGSS.MS-ETS1-4

To be considered a good location for wind energy, an area needs to have average annual wind rate of at least 12 miles per hour.

• density of the air

• rotor area

• wind speed

• topography

This is the element of wind power that deals with the quality, surface and roughness of land.

• density of air

• rotor area

• wind speed

• topography

TRUE / FALSE: Since the rotor area increases with the square of the rotor diameter, a turbine which is twice as large will receive 2² = 2 x 2 = four times as much energy.

• TRUE

• FALSE

Tags

NGSS.HS-PS3-1