Power and Efficiency

Energy efficiency of wind turbines is about

• 90%

• 75%

• 40%

• 12%

Tags

NGSS.MS-PS3-5

Which type of alternative energy source is shown in this picture?

• Wind

• Solar

• Hydroelectric

• Geothermal

What is the energy efficiency of hydroelectric dams?

• 90%

• 70%

• 50%

• 29%

Tags

NGSS.MS-PS3-4

How much light energy in converted to electrical energy in commercial solar panels?

• 75%

• 60%

• 20%

• 5%

Tags

NGSS.HS-PS3-3

Around how much energy is lost in power lines and transformers?

• 25%

• 10%

• 2%

• 0.1%

Energy efficiency of incandescent lightbulbs is

• 50%

• 25%

• 15%

• 5%

Tags

NGSS.MS-PS3-3

The house illustrated here uses panels on the roof to collect a natural resource and convert it into electricity that can be used.
Which alternative energy source does this house use?

• Water

• Wind

• Solar

• Geothermal

What is the energy transformation in hydroelectric dams?

• Kinetic to electrical

• Kinetic to heat

• Electric to kinetic

• Sound to electric

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What type of device might this Sankey be about?

• very efficient LED light bulb

• very inefficient incandescent light bulb

• coal power plant

• wind turbine

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

No machine in existence has 100% efficiency due to ____________________.

• magic

• friction

• smoke

• input

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4