You throw a water balloon downward from the roof of a building at a speed of 3.5 m/s. how fast will the balloon be moving when it hits the sidewalk 8.0 m below?
a.
13 m/s
c.
160 m/s
b.
12.7 m/s
d.
169 m/s

Two large, flat, horizontally oriented plates are parallel to each other, a distance d apart. half way betwween the two plates the electric field has magnitude e. if the separation of the plates is reduced to d/2 what is the magnitude of the electric field half way between the plates?

When you drop a pebble from height a it reaches the ground with speed v if there is no air resistance. from what height should you drop it so it will reach the ground with three times the speed? (a) 9m (b) 3m (c) 6m (d) 18m

Which changes of state do the labels represent? a: b: c: