Answer:
v = 29.4m/s
Explanation:
Since the ball is dropped at rest,
u = 0m/s
a = 9.81m/s²
Using
v = u + at
After 3 seconds,
v = 0 + (9.81)(3)
v = 29.4m/s
There is a threshold frequency for each metal, and only light of a frequency higher than this threshold causes electrons to be emitted from the metal surface.
I believe your answer should be C. Speed.
Are there choices?? i dont see any
the relatively thick part of the earth's crust that forms the large landmasses. It is generally older and more complex than the oceanic crust.
