It takes 6 seconds for a stone to fall to the bottom of a mine shaft. How deep is the shaft?
A) about 60 m
B) about 120 m
C) about 180 m
D) more than 200 m
Answer: C
It takes 6 seconds for a stone to fall to the bottom of a mine shaft. How deep is the shaft?
A) about 60 m
B) about 120 m
C) about 180 m
D) more than 200 m
Answer: C