In an experiment, a control is used to establish a baseline to compare the results of the main experiment to. Having a control group rules out any environmental variables, such as temperature and... In an experiment, a control is used to establish a baseline to compare the results of the main experiment to. Having a control group rules out any environmental variables, such as temperature and...
Knives, including small pocket knives, are only allowed in checked bags. Only plastic and round-tip butter knives are allowed as carry-on blades. Most bladed items are allowed in checked baggage, including scissors, razors, swords, axes, box cutters and blade tools, if they are properly wrapped or sheathed.
Disposable razors and their cartridges are the only types of razors permitted in your carry-on luggage. Razor-type blades, such as box cutters, utility knives, and safety razor blades, are only allowed in checked luggage.You may also carry nail clippers and nail scissors with blades shorter than 4 inches. Donât pack knives or large scissors.