Question

If a microwave oven emits 1,100 J of energy every second, how long will it take for the microwave to emit 4650 J of energy? Express your answer in seconds using the correct number of significant figures. Do not enter your answer using scientific notation.

Answer 1

The microwave will take approximately 4.23 seconds to emit 4650 J of energy.

Step-by-step explanation:

To calculate the time it will take for the microwave to emit 4650 J of energy, we need to divide the total energy by the energy emitted per second. In this case, the microwave oven emits 1,100 J of energy every second. Therefore, the time it will take to emit 4650 J of energy is:

Time = Total energy / Energy emitted per second

Time = 4650 J / 1100 J/s = 4.23 seconds (rounded to two significant figures)

Therefore, The microwave will take approximately 4.23 seconds to emit 4650 J of energy.

Answer 2

Time = 4.2273 seconds

Step-by-step explanation:

The amount of the energy emitted by the microwave = 1100 J/s

It means that :

1100 J of the energy is emitted in 1 second

Also,

1 J of the energy is emitted in [tex]\frac {1}{1100}[tex] second

To calculate:

Time for emitting 4650 J of energy

Thus,

4650 J of the energy is emitted in [tex]\frac {1}{1100}\times 4650[tex] second

Time = 4.2273 seconds