In a calorimeter, Copper: mass 100 g, initial temperature 100 °C; Water: mass 2000 g, initial temperature 40 °C. The final temperature is 40.27 °C.
What is the temperature change for copper? "C*

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.