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An ice cube is placed in a microwave oven. Suppose the oven delivers 135 W of power to the ice cube, and it takes 34,200 J to melt it.

Part A: How long does it take for the ice cube to melt?

Answer :

Final answer:

It will take approximately 253.33 seconds (or about 4 minutes and 13 seconds) for the ice cube to melt in a microwave oven that delivers 135 W of power, if it takes 34200 J to melt the ice cube.

Explanation:

In this case, we are asked to find out how long it takes for an ice cube to melt in a microwave oven that delivers 135 W of power, knowing that it takes 34200 J to melt the ice cube. This is a physics problem dealing with the concept of power (the rate of doing work or transferring heat) and energy.

The time required can be calculated using the formula "time equals energy divided by power". In other words, Time = Energy/Power. Here, the energy needed to melt the ice cube is given as 34200 J and the power delivered by the oven is 135 W.

Therefore, Time = 34200 J / 135 W = 253.33 seconds. So, it will take approximately 253.33 seconds (or about 4 minutes and 13 seconds) for the ice cube to melt in the microwave, assuming that all the power is used to melt the ice cube and not lost as ambient heat.

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