The question states;
A student uses a microwave oven to warm up a cup of cold tea.
Thermal energy is supplied to the tea at a rate of 750 W. The tea has a mass of 0.42 kg and an initial temperature of 17 degrees C. Calculate the final temperature of the tea. Assume the specific heat capacity of the tea is 4200 J kg-1 K-1.
I understand how to calculate the final temperature, but first I have to change the 750 Watts into joules, however, the question gives no time which I can use for the equation Q = Power x time.
Am I missing something obvious here, or has the question been printed incorrectly?
Thermal Physics Question Watch
- Thread Starter
- 12-10-2016 19:20
- 12-10-2016 19:26
Must be printed incorrectly, can't see any way around it
- 12-10-2016 19:47
Agree. Someone forgot to tell you how long the thing's being heated for.