Think its either sedimentary rocks or metamorphic rocks.
The average speed is the ratio between the total space and the total time of the motion:

The total space is

while the total time is

So, the average velocity is

We can also rewrite it in m/s. The total space is

, while the time is

, and so
The element would have 52 protons because atomic number gives protons.
Answer:
power is the rate at which energy is transferred or converted
the unit of power is Watts