Definitely not the last 2. My bet is on the first option. If it is wrong don't hit me please...
Answer with Explanation:
We are given that
Constant speed of Jane=12.6 m/s
a.When Fred can throw the ball 30 m/s
We have to find the angle relative to the horizontal when he throw the ball in order for Sue to see the ball travel vertically upward.
Let
be the angle .
Therefore,



b.We have to find the height to which ball reach.



When the velocity of an object changes, it is acted upon by a force
Yes. sound waves are produced by energy.
It depends on the graphics, color, structure all that stuff for me to believe if the image is real or virtual
Hope I helped you