An ice cube is placed in a microwave oven. Suppose the oven delivers 105 W of power to the ice cube and that it takes 32,200 J to melt it. How long does it take for the ice cube to melt?
http://www.jiskha.com/display.cgi?id=1268687077
that is simple.
energy is never lost so
energy lost by microwave=energy gain by ice cube
32200=105t
t=306.6667secs
An ice cube is placed in a microwave oven. Suppose the oven delivers 105 W of power to the ice cube and that it takes 32,200 J to melt it. How long does it take for the ice cube to melt?
To calculate the time it takes for the ice cube to melt, we can use the formula:
Energy (Joules) = Power (Watts) × Time (seconds)
Given that the power delivered to the ice cube is 105 W and the energy required to melt it is 32,200 J, we can rearrange the formula to solve for time:
Time (seconds) = Energy (Joules) / Power (Watts)
Substituting the given values:
Time (seconds) = 32,200 J / 105 W
Now, let's calculate the value:
Time (seconds) = 307.619 seconds (rounded to 3 decimal places)
Therefore, it takes approximately 307.619 seconds for the ice cube to melt in the microwave oven.