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lukranit [14]
3 years ago
8

You replace a 100 W incandescent lightbulb with a 22 W CFL bulb. If you leave your lights on 24 hours a day, how much energy are

you saving each day by replacing this bulb?
Physics
1 answer:
crimeas [40]3 years ago
5 0
100 watts = 100 joules per second
22 watts  =  22 joules per second
Saving  =  78 joules per second

1 hour = 3,600 seconds
24 hours = 86,400 seconds

     (78 joules/sec) x (86,400 sec)  =  6,739,200 joules
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Answer:

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Explanation:

Entropy: Entropy can be defined as the measure of the degree of disorder or randomness of a substance. The S.I unit of Entropy is J/K.mol

Mathematically, entropy is expressed as

ΔS = ΔH/T....................... Equation 1

Where ΔH = heat absorbed or evolved, T = absolute temperature.

<em>Given:  If 1 mole of water = 0.0018 kg,</em>

<em>ΔH = latent heat × mass = 2.26 x 10⁶ × 1 = 2.26x 10⁶ J.</em>

<em>T = 100 °C = (100+273)  K = 373 K.</em>

<em>Substituting these values into equation 1,</em>

<em>ΔS =2.26x 10⁶/373</em>

ΔS = 6.059 x 10³ J/K.mol

Therefore the entropy change of the sample of water =  6.059 x 10³ J/K.mol

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A particle moving along the x-axis has its position described by the function x=(3.00t3−1.00t 2.00)m where t is in s. at t = 4.0
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X =(3.00x4.00 x3-1.00t x 2.00) x m

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