Multiple choice Calculate how many joules of energy will a 20 W lamp dissipate in one minute. 1200 J 20 J 0.33 J 3 J 0.05 J Reveal answer Fill a bubble to check yourself A Correct answer Explanation Power = Joules/time. Joules = Power*time J = 20* 60 (1 min = 60 sec) Joules = 1200