Question

a machine worked for 5 hours and used 4 kilowatts of electricity. the machine used____of a kilowatt each hour it worked

Answer 1

The machine used 0.8 kilowatts of electricity each hour it worked, calculated by dividing the total electricity used (4 kW) by the total hours worked (5 hours).

Step-by-step explanation:

To calculate the amount of electricity used by the machine each hour, we divide the total electricity consumption by the number of hours worked. The machine worked for 5 hours and used a total of 4 kilowatts of electricity. Therefore, the computation would be:

Electricity used per hour = Total electricity used / Total hours worked

Electricity used per hour = 4 kW / 5 hours = 0.8 kW

So, the machine used 0.8 kW of electricity each hour it worked.

Answer 2

The question is meaningless. It uses "kilowatt" completely incorrectly.

"Watt" and "kilowatt" are rates at which energy is used, NOT
amounts of energy.

The question is a lot like saying that a car traveled for 5 hours at
4 miles per hour, so how many miles per hour did it travel each
hour it drove ?

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If a machine used energy at the rate of 4 kilowatts when it's
running, then it uses 4 kilowatt-hours of energy during every
hour that it runs.

If it runs for 5 hours, then it uses

(4 kilowatts x 5 hours) = 20 kilowatt-hours

of energy during that time.