Because the further away you are from the center of the earth the less gravity there is pulling on your mass.
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Put another way, the typical passenger will feel a maximum of up to 30% heavier or 30% lighter for brief moments depending on whether the aircraft is accelerating, decelerating, climbing, descending, or turning. In general, most people will barely notice these forces.
According to the CAA, you can only bring one small cigarette lighter on a plane. The condition is that your lighter needs to use absorbable liquid fuel. Some common examples would be propane, butane, or natural gas. One exception that is permitted would be liquefied gas.
Jet belly: (noun) the bloated state in which your stomach inflates post-flight. Also, a very unpleasant feeling. May also make you look like you're 3 months pregnant. So how does one prevent this jet belly? Well, it all depends on what you eat on the plane.
What about stepping on a scale? Many reacted less-than-fondly to an announcement earlier this month that Korean Air, a South Korea-based airline, planned to weigh passengers before boarding. A representative for the airline told CNBC the practice would last for about three weeks, and is required by law.
As The Independent has reported previously, weighing every passenger before a flight can increase safety and cut the environmental harm caused by each flight. At present, airlines use “assumed mass” – estimating the total weight of the passengers by using set figures. Typically each passenger is assumed to weigh 88kg.
Safety Razors: Because the razor blades are so easy to remove, safety razors are not permitted in your carry-on luggage with the blade. They're fine to pack in your carry-on without the blade. The blades must be stored in your checked luggage. The same applies for straight razors.
Solid food items (not liquids or gels) can be transported in either your carry-on or checked bags within the continental United States. Liquid or gel food items larger than 3.4 oz are not allowed in carry-on bags and should be placed in your checked bags if possible.