Energy Efficiency and Sankey Diagrams

Where does most of the energy go in this transformation.

• Electrical energy
• Light
• Heat
• other

Tags

NGSS.MS-PS3-4

Where does most of the energy go for this transformation.

• heat
• electrical
• light
• joules

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is this diagram called?

• Stankey Diagram

• Sankey Diagram

• Sankay Diagram

• Samkay Diagram

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

The energy efficiency shown in this diagram is:

• About 10%.

• About 30%.

• About 60%.

• Impossible to tell.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What type of device might this Sankey be about?

• A very efficient LED light bulb
• A very inefficient incandescent light bulb
• A coal power plant
• A wind turbine

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

What might a title be for this sankey?

• Electrical energy
• Efficient light bulb
• 25 Joules of heat
• Sankey for a good heater.

Assume there are 10 Joules of energy. Which is a close approximation to the number of Joules that transform into kinetic energy?

• 1

• 3

• 6

• 10

Which fraction best describes, of the part of the gasoline that is put into a car, that actually makes the car move. 

• 4/10
• 1/4
• 2/4
• 3/5

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

A kettle uses 100J of electrical energy to produce 7J of sound energy and 93J of thermal energy. How efficient is the kettle?

• 100%

• 7%

• 93%

• 95%

A washing machine uses 250J of electrical energy to produce 125J of useful energy. How efficient is it?

• 5%

• 50%

• 55%

• 100%

Tags

NGSS.MS-PS3-5