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KatRina [158]
3 years ago
6

What does combustion mean?what clues help u detemine the meaning?

Physics
2 answers:
Molodets [167]3 years ago
6 0
Combustion Means the process of burning something I know this cause im in middle school and I remember this when i was in elementary school your welcome
 :)
zepelin [54]3 years ago
3 0
Combustion is the process of burning something 
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Answer:

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2 years ago
A lamp is 10% efficient.How much electrical energy must be supplied to the lamp each second if it produces 20 J of light energy
k0ka [10]

If it produces 20J of light energy in a second, then that 20J is the 10% of the supply that becomes useful output.

20 J/s = 10% of Supply

20 J/s = (0.1) x (Supply)

Divide each side by 0.1:

Supply = (20 J/s) / (0.1)

<em>Supply = 200 J/s  </em>(200 watts)

========================

Here's something to think about:  What could you do to make the lamp more efficient ?  Answer:  Use it for a heater !

If you use it for a heater, then the HEAT is the 'useful' part, and the light is the part that you really don't care about.  Suddenly ... bada-boom ... the lamp is 90% efficient !

6 0
3 years ago
Which of the following physical properties would tell you about an element's mass per unit volume ratio?
Igoryamba
Well I can't see the following physical properties you talked about in the question.

Mass per unit volume ratio is called density.
6 0
3 years ago
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