+0  
 
0
184
3
avatar+1117 

How much energy does a 23.0 W light bulb left burning continuously for 336 hr (2 weeks) consume? State your answer in both kilowatt-hours and megajoules.

 May 2, 2019

Best Answer 

 #1
avatar+6046 
+1

\(\text{It hopefully is pretty obvious that it uses}\\ \dfrac{23}{1000}\cdot 336~kw\cdot hr\)

 

\(1~kw\cdot hr = 3.6 \cdot 10^6~J\\ E=\dfrac{23}{1000}\cdot 336 \cdot 3.6 \cdot 10^6 ~J\)

 

you can do all the calculator work

 May 2, 2019
 #1
avatar+6046 
+1
Best Answer

\(\text{It hopefully is pretty obvious that it uses}\\ \dfrac{23}{1000}\cdot 336~kw\cdot hr\)

 

\(1~kw\cdot hr = 3.6 \cdot 10^6~J\\ E=\dfrac{23}{1000}\cdot 336 \cdot 3.6 \cdot 10^6 ~J\)

 

you can do all the calculator work

Rom May 2, 2019
 #2
avatar+1117 
+2

why did you do 23/1000?

SmartMathMan  May 2, 2019
 #3
avatar+6046 
+1

watts to kilowatts

Rom  May 2, 2019

30 Online Users