We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
112
3
avatar+1112 

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+5770 
+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+5770 
+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+1112 
+2

why did you do 23/1000?

SmartMathMan  May 2, 2019
 #3
avatar+5770 
+1

watts to kilowatts

Rom  May 2, 2019

11 Online Users

avatar