The answer is c or b u choose
Answer:
25 meters
Explanation:
1 sec is 2.5, 1x10 so 2.5x10=25
It does produce 'sound' ... a compression wave traveling through the air. But your ears don't hear a sound that's vibrating less than 20 or 30 times every second. If you could swing your pendulum that fast, you could hear the sound of its vibrations pushing the air around.
Answer:
C. over land in polar regions.
Explanation:
To be accurate, it must be able to make measurements that are close to the actual value.
