Why does a lack of sleep affect your body's performance?

Ab+cd-> ad+bc is what kind of reaction

While carrying a rack of tubes containing blood to be discarded in the biohazard container, jennifer slips and falls. the tubes scatter everywhere, but, fortunately, only three of them break. this accident occurred in the main hallway, so jennifer needs to think fast and get this mess cleaned up. what ppe should jennifer apply?

Sometimes without even knowing it, people waste fresh water. write an editorial for our school newspaper. try to convince your readers that saving and recycling water should be something they do every day.