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.
Sharp Items. Whether in carry-on or checked bags, some personal grooming items are forbidden while others are permitted. You may carry on a disposable razor, for instance, but you must check the razor blades. Scissors shorter than 4 inches are allowed in any type of carry-on or checked bag. So are nail clippers, tweezers and similar small metal grooming items. Limits