An ice cube is placed in a microwave oven. Suppose the oven delivers 135 W of power to the ice cube and that it takes 30200 J to melt it. How long does it take for the ice cube to melt?
power=work/time
time=30200/135 seconds
To find out how long it takes for the ice cube to melt, we need to use the equation:
Energy = Power * Time
In this problem, the energy required to melt the ice cube is given as 30200 J, and the power delivered by the microwave oven is given as 135 W. We can rearrange the equation to solve for time:
Time = Energy / Power
Plugging in the given values:
Time = 30200 J / 135 W
To calculate the time, we need to convert the power from watts to joules per second (J/s) since we have the energy in joules. We know that 1 watt is equal to 1 joule per second, so:
135 W = 135 J/s
Now we can substitute this value into the equation:
Time = 30200 J / 135 J/s
Simplifying:
Time = 224 seconds
Therefore, it takes 224 seconds for the ice cube to melt in the microwave oven.