Answer:
I think that the statement is relative to speed because it is saying km per second.
Rocks are made up deposited minerals that form and condense into rocks
<span>the bonds in iron(III) oxide are more ionic</span>
Answer : The final temperature of the copper is, 
Solution :
Formula used :

where,
Q = heat gained = 299 cal
m = mass of copper = 52 g
c = specific heat of copper =
= final temperature = ?
= initial temperature = 
Now put all the given values in the above formula, we get the final temperature of copper.


Therefore, the final temperature of the copper is, 
B, turns red litmus paper to blue