Moon effect. some people believe that the moon controls their activities. the moon moves from being directly on the opposite side of earth from you to be being directly overhead. assume that the earth-moon (center-to-center) distance is 3.82 108 m and earth's radius is 6.37 106 m. (a) by what percent does the moon's gravitational pull on you increase? % (b) by what percent does your weight (as measured on a scale) decrease? %

These models show the electron structures of two different nonmetal elements. which element is likely more reactive, and why? element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table. element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table. element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons. element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

Contrast the force of gravity between these pairs of objects a 1 kg mass and a 2 kg mass that are 1 m apart and two 2 kg masses that are 1 m apart

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults