a burner consumes 110 kj of energy in 55 seconds .what is the power of the burner in kilowatt ?

(note - the answer is : 2 kw ).

Energy = 110kJ = 110*10³ J

Time = 55 seconds

• Power is defined as energy per unit time.

P = E / T 

= 110 * 10³ J / 55 sec. 

P = 2 * 10³ J/sec.

1 J/sec. = 1 Watt

P = 2kW