Specific Heat Capacity (final temperature)

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#1
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 750W. The tea has a mass of 0.42kg and an initial temp. of 17 degrees celsius. Calculate the final temperature of the tea. Assume that the specific heat capacity of the tea is 4200 J Kg^-1 K^-1.> Following re-heating the tea, the student decides it's too strong and adds milk of temperature 5.5 degrees celsius and the temperature of the tea drops to 71 degrees celsius. during this time the student assumes that no thermal energy is lost to the surroundings. Calculate the decrease in thermal energy of the tea.
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1 year ago
#2
(Original post by ibihc_)
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 750W. The tea has a mass of 0.42kg and an initial temp. of 17 degrees celsius. Calculate the final temperature of the tea. Assume that the specific heat capacity of the tea is 4200 J Kg^-1 K^-1.> Following re-heating the tea, the student decides it's too strong and adds milk of temperature 5.5 degrees celsius and the temperature of the tea drops to 71 degrees celsius. during this time the student assumes that no thermal energy is lost to the surroundings. Calculate the decrease in thermal energy of the tea.
Two things missing here, one extra piece of information (time in oven ?) is needed to answer the 1st part, and a bit of effort from you to show what you have tried as TSR is not a homework solving machine.
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#3
(Original post by Mr Wednesday)
Two things missing here, one extra piece of information (time in oven ?) is needed to answer the 1st part, and a bit of effort from you to show what you have tried as TSR is not a homework solving machine.
This is all I was given I tried for over 2 hours actually and the question is from an AQA A-Level physics year 2 text book by England, Davenport, Pollard and Thomas, if u were wondering... One thing missing there is some human decency, it's pretty good you should try it sometime.
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