How long could this (20% efficient) generator supply power to a 1500 W electrical heater with the 5 gal of gas? (1.5 points) 1.3 x 10 J x sec / 1500 J x min / 60 sec x hr / 60 min = 5.6 hoursThis generator could supply power to a 1500 W electrical heater for 5.6 hours.