The ball drop 2kms in the air
Answer:
8387 J
Explanation:
work produced= 5284 J
efficiency of 63%
the efficiency η= Work done÷ heat supplied


solving 
therefore, the input heat= 8387 J
The direction the telescope may be heading ummm honestly I don’t know the answer to that
Number 7is 64. 8 is 486 because 3 to the 5th is 243 then multiply by 2.
9 is 1003.092
10. Is 5
167•F which is c
Tell me my wrong from right