1.
The energy in a mechanical system is determined by adding the potential and kinetic energy together.

total
massive
2.
The initial energy is equal to zero because the starting point is set at zero height to make things easier.

kinetic
potential
3.
In the example, the final kinetic energy is determined to be because at the peak height, the ball instantaneously stops.

positive
zero
negative
4.
In this system, potential and kinetic energy are proportional.

inversely
directly

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Calculate the ratio of h+ ions to oh– ions at a ph = 7. 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 = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)