Question

You plan to take your hair blower to europe, where the electrical outlets put out 240 v instead of the 120 v seen in the united states. the blower puts out 1600 w at 120 v .

Answer 1

P = U × I
I = P / U = 1600W / 120V = 13.4A
P = 240V × 13.4A = 3216W

If your hair blower isnt rated for 220- 230V(this is the voltage in EU) you are most likely going to burn it.