4. I meter
5. 0.453 kilometers
6. 89.84700 microns
7. Yo momma
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, 
Answer:
A pH of 7 is neutral.A pH of less than 7 is acidic.
Explanation: