90 watts = 0.09 KW
Energy = (power) x (time) =
(0.09) x (24) KWh
Cost = (energy) x (unit price) =
(0.09 x 24) x ($0.51) = <em>$1.10</em> per day (rounded)
(Those are very expensive kWh's.)
D.<span>Wave 3 resulted from constructive interference, and Wave 4 resulted from destructive interference.
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When a star is moving away from earth it appears blue
Answer:
On one end of the electromagnetic spectrum are radio waves, which have wavelengths billions of times longer than those of visible light. On the other end of the spectrum are gamma rays, with wavelengths billions of times smaller than those of visible light.
Explanation:
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A screw driver rusting when left in a pail of water is a chemical reaction
