Anthony is experimenting with how the amount of air inside a basketball affects how high it bounces. He uses logical reasoning to conclude that he
should drop each ball from the same height. Why is this important?
A. Dropping the balls from different heights would take longer.
B. Dropping the balls from different heights would introduce error.
C. Dropping the balls from the same height will create more data for
the experiment.
D. Dropping the balls from the same height is less fun.

Ithink the answer is a or d.

Decomposition is the cycle at which bacteria breaks down any organic material into the soil

The correct answer is weight.

Answerthis solution will not form a precipitateexplanationsolubility equilbrium:         pbf₂(s)  ⇄ pb²⁺(aq) + 2 f⁻(aq)the solubility product expression is    (we exclude solids from the equilibrium expression).now suppose we have the trial ion product q, which we can define as    then, we can interpret  q as the product of the concentration of the ions that we have and ksp as the product of the ion concentrations that are needed to form a saturated solution.if q > ksp, then that implies that there will be a surplus of ions that exceed the amount that is required to form a saturated solution. a precipitate will then form (the precipitate continually  forms until the surplus ions are removed and q is decreased to ksp's value).if q = ksp, the saturated solution that forms is barely saturated and the precipitate will be minimal.if q < ksp, then the ion concentration will not be enough to form a saturated solution (so no precipitate).using our information, we calculate the trial ion product:     since q = 2.7  × 10⁻⁸ < ksp =  4  ×  10⁻⁸, a precipitate will not form.