If an electric water heater uses 40 kW of power and runs for 8 hours, what is the total amount of energy used?

a. 5 kilowatt-hours

b. 32 kilowatt-hours

c. 48 kilowatt-hours

d. 320 kilowatt-hours

In a parallel circuit with three bulbs,

a. the bulbs must all be located on the same branch.

b. there is only one path for the current to take.

c. current from each bulb has its own path.

d. the overall resistance increases ...

Question

Physics

Braxton West

14 April, 09:32

If an electric water heater uses 40 kW of power and runs for 8 hours, what is the total amount of energy used?

a. 5 kilowatt-hours

b. 32 kilowatt-hours

c. 48 kilowatt-hours

d. 320 kilowatt-hours

In a parallel circuit with three bulbs,

a. the bulbs must all be located on the same branch.

b. there is only one path for the current to take.

c. current from each bulb has its own path.

d. the overall resistance increases ...

+5

Answers (1)

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Knapp · Answer 1

1) d. 320 kilowatt-hours

The energy being transmitted in kilowatt-hours is the product of the power in kilowatts and the time in hours.

2)

c. current from each bulb has its own path.

In a parallel circuit, the current takes each of the separate paralell paths.