Elaborate . on what can be learned about the properties by the location of element on the periodic table . use atomic number 13 as an example .

An equinox occurs when a. neither end of earth's axis is tilted toward or away from the sun. b. the north end of earth's axis is tilted away from the sun. c. the north end of earth's axis is tilted toward the sun. d. earth's axis is parallel to the sun's rays. select the best answer from the choices provided a b c d

Aball horizontally thrown from a cliff at 8m/s

Are formed where bumps from two surfaces come into contact ?