Which best describes the history of scientific knowledge?

Scientific knowledge changes over time because new experiments are conducted and new data is introduced.
Scientific knowledge changes as political conditions change.
Scientific knowledge changes when different scientists become more popular.
Scientific knowledge does not change because science is factual.

Gunpowder residue is most likely to show up where on a shooters hands

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

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?