How far apart (in mm) must two point charges of 70.0 nc (typical of static electricity) be to have a force of 1.30 n between them?

Researchers conducted an experiment to identify the effects of three different hand sanitizers on the growth of bacteria. the researchers grew one type of bacteria in twenty-four identical covered petri dishes. then, they opened eighteen petri dishes and applied the three hand sanitizers to six petri dishes each. they left the remaining six petri dishes closed as a control group. when the researchers measured the growth of bacteria two days later, the six dishes that had no hand sanitizer showed the least amount of bacterial growth. the researchers concluded that not using any hand sanitizer would lead to the least bacterial growth. which statement best explains why the researchers’ conclusion was not justified? the experiment tested too many variables. the control group was not treated the same as the experimental group. the sample size of twenty-four petri dishes is not large enough. the single type of bacteria is not adequate to make any conclusions.

Ascientist plants two rows of corn for experimentation.she put fertilizer on row 1 but does not put fertilizer on row 2 both rows receive the same amount of water and light intensity she checks the growth of the corn over 5 months what is the constant in this experiment

What is the main difference between the formulas for kinetic energy (ke) and gravitational potential energy (pe)? a. ke depends on position and pe depends on motion. b. ke depends on motion and pe depends on position. c. both energies depend on motion, but only ke depends on position. d. both energies depend on position, but only pe depends on motion.