11. B
12. A
13. D
14. The ball burnt off energy while rolling, it lost potential energy and couldn't go as high.
Answer:
your answers are correct i have done this many times
Adding both distances together, you get a total of 1800 miles. With the total travel time of 4 hours, you divide the distance traveled by the time it took. so 1800/4=450 mph
Answer:
Minimum uncertainty in position is 
Explanation:
It is given that,
Uncertainty in the position of an electron, 
According to uncertainty principle,
Let 
is the uncertainty in position after 2 seconds such that,
or
Hence, this is the required solution.
