Final answer:
The toaster uses 2000 Joules of energy in 5 seconds.
Step-by-step explanation:
To find how much power a toaster uses in 5 seconds, we can use the formula:
Power = Voltage x Current
We are given that the toaster uses 400 W of power, which means it consumes 400 Joules of energy per second. So, in 5 seconds it would use:
Energy Used = Power x Time = 400 W x 5 s = 2000 Joules
Therefore, the toaster uses 2000 Joules of energy in 5 seconds.