Question

Salama uses a 1500 w hair dryer for 0.5 hours to dry her hair . how much electric energy dose salama use

Answer 1

Answer:

2700 units

Explanation:

0.5 hrs = 30 mins = 30 × 60 = 1800sec

1 W = 1 J/s , 1000 J/s = 1 kW = 1 unit

Therefore,

1500 W = 1500 J/s

= 1500 × 1800

= 27,00,000 J

= 2700 units