Students in ms. winters' class were interested in testing the antibacterial strength of hand soap versus hand sanitizer. the students planned to wash their hands using the sanitizer or soap and warm water for two minutes, then dry their hands with a paper towel. the standard of comparison would be rubbing their hands vigorously for 2 minutes in warm water, without any soap or sanitizer, and then drying with a paper towel. the sanitizer advertisement claimed to kill bacteria more effectively than any soap. after washing, hands would be swabbed and then the swab applied to a culture plate and incubated. finally, the bacterial cultures would be counted.
what would be an appropriate research question to guide this scientific investigation?
a) what method kills bacteria?
b) under what conditions does bacteria grow best?
c) is hand sanitizer more effective in killing bacteria than hand soap?
d) how does using hand sanitizer to kill bacteria compare to using just warm water?

Based on the position vs. time graph which velocity vs. time graph would correspond to the data

What royal scientist used the 29th day of frozen vapor to encounter elements for mastering new culinary creations?

Which explanation is true about what happens to a ray of light when it strikes a mirror? a. a light ray is transmitted toward a mirror at a certain angle. the light ray is then reflected by the mirror at an equal angle but in the opposite direction of the transmitted ray. b. an incident ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then reflected at an angle equal to the angle of incidence but on the opposite side of the perpendicular line. c. a reflecting ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then refracted at an angle equal to the angle of the reflecting ray and on the same side of the perpendicular line. d. an incident ray strikes a mirror at an angle with a line parallel to the mirror. the light ray is then transmitted at an angle equal to the angle of incidence but on the opposite side of the parallel line. you so much! : -d take the time to try and answer correctly.