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.
Passengers often wonder if disposable razors are allowed in carry-on luggage. Disposable, or safety, razors are permitted in carry-on luggage because the blades are enclosed in the plastic holder. Straight razors use loose blades, which could be used as weapons: therefore they are prohibited.