(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The mass of the piece of ice is 0.25kg.

Heated by an electric heater (assume there is no loss of energy to the surroundings)

Started at -30°C at 0seconds

After 150s the ice cube is -10°C

2. Relevant equations

Q=mL[itex]_{f}[/itex]

[itex]\Delta[/itex]t=Q[itex]/[/itex]P

3. The attempt at a solution

Q=mL[itex]_{f}[/itex]

=(0.25kg)(330000J/(kg·°C)

=82500J

I know the next step is to use the second equation, but since I don't know the W of the heater, how would I go abouts finding out the time??

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# Homework Help: Determining time to melt an ice cube

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