Physics Review Question

Unit: waves
Year: 1992 Question#: 30
Question: What is the approximate amount of electrical energy needed to operate a 1,600-watt toaster for 60. seconds?

(1 ) 27j
(2 ) 1,500j
(3 ) 1,700j
(4 ) 96000j

What is this question really asking?



Explanation by: Danielle

[ Return to question menu ]













Answer 1
27j

INCORRECT

you don't divide 1600watts by 60s to find electrical energy
Try P=W/t return to top























Answer 2
1500j

INCORRECT

Try the formula P=W/t return to top



























Answer 3
1700j
INCORRECT

Try the formula P=W/t return to top


























Answer 4
96000j

CORRECT
You used the formula P=W/t correctly, where
P = 1600 watts
t = 60 s
W = the energy used (work done)
return to top


























What's this question really asking?

What is the work done by this appliance? return to top

[Home]  [Lessons]  [Review]  [Search]  [Links]

This web site is designed and maintained by Science Joy Wagon and may not be reproduced or redistributed without written permission from Science Joy Wagon.
Contact with comments.