Keywords

PhET Gas Properties simulation

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Unit 5 KeyWords

4.4

Version 1 


Efficiency = Useful Eout/ Total Ein x100


Useful Eout = useful energy output  (J) 
Total Ein = total energy input (J) 
Efficiency = Efficiency (%) 


Version 2 


Efficiency = Useful Eout / Total Ein


Useful Eout = useful energy output (J) 
Total Ein = total energy input (J) 
Efficiency = Efficiency (no units; a number between 0 and 1) 

Energy input; energy output worksheet

Key words

Objectives 4.2 and 4.3

End Of Year Exam - Scientific Facts I need to remember to improve

objective 3.17

objective 3.16

For Plane mirrors, the image is...
- The same size as the object 
- The same distance as the object from the mirror

- Virtual (not real) 

- Upright

- Lateral Inverted 

objective 3.15

3.15 - recall that the angle of incidence equals the angle of reflection 


Light Sources 
How do light rays from the sun and other light sources reach out eye? 
- They travel in a straight line directly into our eye. 
How do light rays from a book and other such objects reach out eye? 
- Light from the sun or another light source strikes the book and some of the light is reflected into out eye. 


Opaque materials do not let light through 
Transparent materials do let light through


Angle of incidence = Angle of reflection