The current draws from the car's 12-V battery is 8 A.
Explanation:
heat capacity of water: 4186 J / kg C
mass water = 0.13 kg
To heat water:
Q = 0.13 [tex]\times[/tex] 4186 [tex]\times[/tex] (93-25)
= 37004.2 J
Power = Q / t
= 37004.2 / (8.6 [tex]\times[/tex] 60)
= 71.713 J/s
Pbat = 71.713 / 0.75
= 95.617 J/s
[tex]Pbat = \frac{v^{2} }{r}[/tex]
r = 144 / 95.617
= 1.50 ohms
I = v/r
= 12/1.5
I = 8 A.
