4.5

4.5

21 June 2011

· 4.5 describe a variety of everyday and scientific devices and situations, explaining the fate of the input energy in terms of the above relationship (see 4.4), including their representation by Sankey diagrams

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4.4

4.4

21 June 2011

4.4 recall and use the relationship:

efficiency = useful energy output

total energy input

Version 1

Efficiency = Useful Eout / Total Ein x 100

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 )

Efficiency.ppt Download this file

% efficiency energy.swf Download this file

4.2

Begin forwarded message:

From: Matt Baker <maba@patana.ac.th>

Date: June 14, 2011 1:55:00 PM GMT+07:00

To: Amaris Odermatt <amod14@patana.ac.th>, Churaimas Diskul <chdi14@patana.ac.th>, Hannah Amanda Fotheringham <hafo14@patana.ac.th>, Jakraraj Rungsaeng <jaru14@patana.ac.th>, Janyaporn Buaboos <jabu14@patana.ac.th>, Jarouwit James <jaja14@patana.ac.th>, Khuntup Issara <khis14@patana.ac.th>, Napas Jira <naji14@patana.ac.th>, Oliver Thomas Bailey <olba14@patana.ac.th>, Tamara Nikki Davies <tada14@patana.ac.th>

Subject: 4.2

4.2

10 June 2011

11:38

·         

4.2 describe energy transfers involving the following forms of energy:

thermal (heat), light, electrical, sound, kinetic, chemical, nuclear and potential (elastic and gravitational)

<<9 Types of energy - answers.ppt>>

Extension:  What does "potential" mean?

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4.3

________________________________________
From: Matt Baker
Sent: Tuesday, June 14, 2011 1:55 PM
To: Amaris Odermatt; Churaimas Diskul; Hannah Amanda Fotheringham; Jakraraj Rungsaeng; Janyaporn Buaboos; Jarouwit James; Khuntup Issara; Napas Jira; Oliver Thomas Bailey; Tamara Nikki Davies
Subject: 4.3

4.3

10 June 2011

11:42

• 4.3 understand that energy is conserved
>

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