A 60-W light bulb is left on for 5 hours. How much energy does it consume?
A12 J
B300 J
C1,080,000 J
D5 J
Explanation
📌 Energy = Power × Time. Convert 5 hours to seconds: 5 × 3600 = 18,000 s. Energy = 60 × 18,000 = 1,080,000 J. Distractor A: used ratio; B: used only 5 hours as t = 5 s; D: used only P without t.