Describe the motion of a swing that requires 6 seconds to complete one cycle. What is it’s period and the frequency? Round to the nearest hundredth

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

Which of the following electromagnetic waves can create ions?