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10 Objects with their energy paths - Printable Version

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10 Objects with their energy paths - Derp - 11-25-2011 11:24 AM

Ok this is pretty complicated.... I have to pick 10 everyday electronic items and list their energy paths, where the energy was lost and how could I fix this problem?

for example:

A)iPod:Electrical → Chemical → Sound → Light
B) Where it was lost
C) How can i fix this problem

the 10 items i chose
Cell Phone

This is Grade 10 science btw

RE: 10 Objects with their energy paths - Elfy - 11-25-2011 04:15 PM

Quote:A)iPod:Electrical → Chemical → Sound → Light

Don't forget heat is also one and that's typically classed as wasted energy. I assume when it says where was it 'lost' (if your teacher wrote that I'd be slightly concerned), you have to point out where it is on the object? Remember energy is never lost but transfered. I didn't take chemistry but I assume an iPod uses a rechargable battery so you wouldn't be converting chemical energy. Both sound and light come from the conversion of electrical energy and some is converted to heat energy due to kinetic energy. I don't see why you would want to fix the problem as that would defeat the purpose of having a screen, speakers, hell, an iPod.

RE: 10 Objects with their energy paths - Derp - 11-26-2011 02:51 AM

i really want the answers for all of them

RE: 10 Objects with their energy paths - Elfy - 11-26-2011 07:51 AM

It's not too difficult, it's actually pretty repetitive.

For each item just think what is going on. What does a hairdryer do? Make heat and sound energy from electrical energy.

RE: 10 Objects with their energy paths - Derp - 11-27-2011 12:08 PM

i really need to know where the energy was lost?

eg: iPod → Electrical → Chemical → Sound → Light

B) The energy was lost because of Heat from using the iPod for a prolonged amount of time

i need this question answered for the others