A 129 v electric iron draws 3.47 a of current. how much heat is developed per hour? answer in units of j.

Heat is given by the formula; IVt, Where I is the current in amperes, V is the voltage in volts and t is the time in seconds.

Therefore; Heat = 3.47 * 129 * 3600 (1 hour, has 3600 seconds)

= 447.63 * 3600

= 1611468 Joules

= 1.61 * 10^6 joules in one hour