Air caught in the ball of foil makes the ball less dense than water
Answer:
2 seconds
Explanation:
The function of height is given in form of time. For maximum height, we need to use the concept of maxima and minima of differentiation.

Differentiate with respect to t on both the sides, we get

For maxima and minima, put the value of dh / dt is equal to zero. we get
- 32 t + 64 = 0
t = 2 second
Thus, the arrow reaches at maximum height after 2 seconds.
1) electrons
2) negative
3) negative
4) charge cannot be created or destroyed, just transferred
5)
6) does not allow electrons to move through it
7)plastic
8)conduct the lightning away from the house
9) electrical current
I hope this helps! I know about each of those laws for number 5, however the question didn't give a good description of any of the laws.
Best wishes!
For number one she is going to observe the contraction of the ballon
For number two she is going to observe the expansion of the ballon