What is the intial temperature of a 1.89 gram hot piece of copper (specific heat = 0.094 cal/g°C) that is cooled by placing it in 8.0 grams of 1.0 °C water (specific heat = 1.0 cal/g °C)? The final temperature of the system is 3.0 °C.

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium