subject
Physics, 16.07.2019 22:00 blackboy21

In a recent experiment, anti-bacterial hand sanitizer was compared to hand soap. students washed their hands using the sanitizer or soap and warm water for two minutes; then they dried their hands with a paper towel. the standard of comparison was rubbing 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 were swabbed and then the swab applied to a culture plate and incubated. finally, the bacterial cultures were counted and recorded in the data table. what would be a valid conclusion to draw from this data? a) all methods are effective in killing bacteria. b) both soap brands out perform hand sanitizer in killing bacteria. c) warm water is as effective as soap or sanitizer in killing bacteria. d) hand sanitizer is more effective than either soap in killing bacteria.

ansver
Answers: 2

Other questions on the subject: Physics

image
Physics, 22.06.2019 09:40, alyssa32900
(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)
Answers: 1
image
Physics, 22.06.2019 10:00, lulu8167
What is the temperature in degrees celsius of a substance with a tempature of 49k
Answers: 2
image
Physics, 22.06.2019 10:30, gyexisromero10
Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.
Answers: 2
image
Physics, 22.06.2019 19:50, carlinryan
An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)
Answers: 2
You know the right answer?
In a recent experiment, anti-bacterial hand sanitizer was compared to hand soap. students washed the...

Questions in other subjects:

Konu
Mathematics, 11.10.2019 23:00
Konu
Mathematics, 11.10.2019 23:00