Wind and Solar Energy

In a photovoltaic (PV) solar panel ________ energy is converted to _________.

• radiant (solar), electrical

• electrical, radiant (solar)

• thermal, radiant (solar)

• radiant (solar), thermal

Tags

NGSS.HS-PS3-3

In a solar heating panel ________ energy is converted to _________.

• radiant (solar), electrical

• electrical, thermal

• thermal, radiant (solar)

• radiant (solar), thermal

Solar power is different to the other primary energy sources because it

• does not require a turbine to produce electricity

• it is a renewable energy source

• it does not produce carbon dioxide

• it can be used to produce electricity or thermal energy

A wind turbine produces average power P. If the wind speed is reduced in half, what is the new average power.

• 2P

• P/2

• P/4

• P/8

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A wind turbine has average power output P. If the blade length of the turbine is tripled, what is the new average power?

• 3P

• 9P

• 27P

• P/3

Tags

NGSS.HS-PS3-1

Calculate the minimum area of solar heating panels required to heat 100 kg of water (4180 J kg^-1 K^-1) from 20.°C to 40.°C in 2.0 hours. (solar constant 1360 W m^-2).

• 0.85 m²

• 3073 m²

• 1161 m²

• 58 m²

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

Calculate the area needed for PV panels with an efficiency of 21% to charge a battery that stores 9.0 MJ in 8 hours of daylight. (solar constant 1360 W m^-2)

• 1.1 m²

• 174 m²

• 0.048 m²

• 1488 m²

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-3

Determine the minimum blade length needed for a 85 % efficient wind turbine that needs to sustain an output power of 360 W with a wind speed of 2.5 m s^-1. (air density is 1.3 kg m^-3)

• 3.6 m

• 1.8 m

• 11 m

• 5.8 m

Tags

NGSS.HS-PS3-3

Wind Energy is...

•  Energy that comes from harnessing the movement of the air

• Energy that comes from the Sun

• A source of renewable energy, such as solar, wind, or geothermal energy

• Fuel from plant material

What do we call large areas of windmills?

• Wind farms

• Hurricanes

• Turbines

• Wind tunnels

Tags

NGSS.MS-ESS2-6