A 0.10 kg piece of copper, initially at 95C, is dropped into 0.20 ...

[yoroshambo]

A 0.10 kg piece of copper, initially at 95C, is dropped into 0.20 kg of water contained in a 0.28-kg aluminum can; the water and aluminum are initially at 15C. What is the final temperature of the system?
 
  A) 19.2C
  B) 7.89C
  C) 18.3C
  D) 17.8C
  E) 23.7C

Question 2

In a vacuum, all electromagnetic waves travel at the same speed.
 
  Indicate whether the statement is true or false

[krakiolit]

Answer to Question 1

D

Answer to Question 2

TRUE