Answer:
Today, one second is defined as “9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom”. That's a mouthful.
D. A joint in the spine that is slightly movable and separated by cartilage.
Explanation:
got it from edge2020
Corrosion Resistance
aluminum's high resistance to corrosion ensures the safety of the aircraft and its passengers.
b
