Answer :
To melt the ice cube, it would take approximately 5.91 minutes in the microwave oven, given that it requires 32,200 J to melt the ice cube and the oven delivers 91 W of power.
To determine the time needed to melt the ice cube, we can use the formula: Time = Energy / Power.
Given that it requires 32,200 J to melt the ice cube and the oven delivers 91 W of power, we can plug these values into the formula.
Time = 32,200 J / 91 W
To simplify the calculation, we need to convert the power to joules per second (J/s), since the unit of energy is in joules (J).
1 watt (W) = 1 joule per second (J/s)
Therefore, the power delivered by the oven is 91 J/s.
Now we can substitute the values into the formula:
Time = 32,200 J / 91 J/s
Simplifying this equation gives us:
Time = 354.9 s
Since the question asks for the time in minutes, we can convert seconds to minutes by dividing by 60:
Time = 354.9 s / 60 s/min
Time = 5.91 min (rounded to two decimal places)
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