im not looking for someone to give me the answer i really need someone who can show me the steps to get the answer: the question is : Find the efficiency of a 23W fluorescent tube that is used 4.0 h per day and in that time produces 6.624 x 10^4 J of useful light energy?
how do i find the efficiency ?How this works out? for science ?
it is using 23 watts of electrical power.
that is 23 joules/second. In 4 hours that is
23 joules/second x 3600 sec/hr x 4 hours = 331200 joules
efficiency is output/input = 66240/331200 = 0.2 or 20%
.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment