Did Lister test his assumption that mold could kill bacteria on human subjects? No, that would have been illegal.

No, he could not find any willing test subjects.

Yes, a nurse with whom he worked had a bacterial infection on her arm; when he applied a salve containing the mold spores, the infection became much worse

Yes, a nurse with whom he worked had a bacterial infection on her arm; when he applied a salve containing the mold spores, the infection resolved.

How many atoms of oxygen are contained in 160 grams of n2o3

To find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? a) when more work was done, the couch was moved the same distance. b) when more work was done, the couch was moved less. c) when more work was done, the couch was moved further. d) when more work was done, the couch wasn't moved at all.

Why is it that 85.48 rounded to two significant figures is 85 and not 86?