1. If it is given that 1kWh= 3,600,000 J; and 1 kWh of electricity costs$0.9, then what is the amount of electricity consumed (J) and amount of electrical energy consumed (kWh) of a appliance of 4000 W and operated for 15 minutes? please list steps clearly.
2. here: http://www.flickr.com/photos/81115255@N00/3162329460/
and here: http://www.flickr.com/photos/81115255@N00/3162333636/
please help. thanks.
science questions
2009-01-03 8:58 pm
回答 (1)
2009-01-04 2:20 am
✔ 最佳答案
1. Amount of electricity consumed:4000W x 1/4 hour = 1kWh = 3,600,000 J
2.1 Both b. and c.
2.2 0.6A
2.3 1.8A Current = 0.6 x no. of light blub (A)
There is a OR logic. All the rest column in the table are " ON "
收錄日期: 2021-04-23 14:49:43
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090103000051KK00702