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.
Personal Items. Most airlines allow you to bring one personal item such as a briefcase or purse and one larger carry-on bag -- most airlines have a maximum size of 9 by 14 by 22 inches -- though you may also opt to check luggage. Contact your airline to find out about checked-bag fees and size limits.lectronics. Personal electronics are allowed in either your checked or carry-on luggage. In fact, it might be preferable for you to keep items such as laptops, MP3 players, video cameras and video game systems with you, because checked baggage might be jostled quite a bit as it's loaded onto and off the plane.