An electric field from a charge has a magnitude of 4.5 × 104 n/c at a certain location that points inward. if another charge with a magnitude of −2.0 × 10−6 c is brought near it, what is the strength of the electrostatic force that acts on this charge and how do the two charges behave?

0.09 n; repel each other
−0.09 n; attract each other
−2.3 n; repel each other
2.3 n; attract each other

Find the volume of the ellipsoid x^2+y^2+5z^2=36.

Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1

(**i would really appreciate if this was answered soon** ) which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?