a. The ball's horizontal and vertical positions at time
are given by


The ball reaches the net when
:

At this time, the ball is at an altitude of

which is 1.40 m - 0.900 m = 0.500 m above the net.
b. The change in angle gives the ball the new position functions


The ball reaches the net at time
such that

at which point the ball's vertical position would be

so that the ball does not clear the net with 0.343 m - 0.900 m = -0.557 m.
Metaphase; the centromeres of duplicated chromosomes line up in the middle of the cell. (It's also the shortest phase of mitosis).
The same voltage will appear across all resistors in parallel.
Almost right. protons are positive and electrons are negative. so when you run the balloon on your hair, electrons are transferred between them (i’m not sure which direction) and now one is positively charged as it lost negative particles and one is negative as it gained negative particles (electrons). opposite charges attract