High School

An ice cube is placed in a microwave oven. Suppose the oven delivers 135 W of power to the ice cube, and it takes 32,200 J to melt it. How much time does it take for the ice cube to melt?

Answer :

To calculate the time it takes to melt an ice cube in a microwave, divide the energy required to melt the ice cube (32,200 J) by the power of the microwave (135 W), resulting in approximately 3 minutes and 58.52 seconds.

To determine how long it takes for the ice cube to melt in the microwave, we can use the formula time (t) = energy (Q) / power (P). Given that the oven delivers 135 Watts of power and it takes 32,200 Joules to melt the ice cube, we can substitute the values into the formula.

Time (t) = 32,200 J / 135 W

Therefore, the time taken for the ice cube to melt is:

Time (t) = 238.52 seconds, which is approximately 3 minutes and 58.52 seconds.