D. Electrons are shared between the bromine atoms and carbon atoms
The match
you need to light the match before you can light anything else.
and after the match is lit, maybe light the oil lamp first
Answer:
η = 40 %
Explanation:
Given that
Qa ,Heat addition= 1000 J
Qr,Heat rejection= 600 J
Work done ,W= 400 J
We know that ,efficiency of a engine given as

Now by putting the values in the above equation ,then we get

η = 0.4
The efficiency in percentage is given as
η = 0.4 x 100 %
η = 40 %
Therefore the answer will be 40%.
Answer:
c is the one that makes the most sense
Explanation: