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The apparent weight can also differ from weight when an object is "partially or completely immersed in a fluid", where there is an "upthrust" from the fluid that is working against the force of gravity. [2] Another example is the weight of an object or person riding in an elevator.
The constraint force can be tension in a spring scale measuring its weight in the fluid, and is how apparent weight is defined. If the object would otherwise float, the tension to restrain it fully submerged is: =. When a sinking object settles on the solid floor, it experiences a normal force of:
This is usually referred to as the apparent weight of the object. A common example of this is the effect of buoyancy, when an object is immersed in a fluid the displacement of the fluid will cause an upward force on the object, making it appear lighter when weighed on a scale. [19] The apparent weight may be similarly affected by levitation and ...
Buoyancy (/ ˈ b ɔɪ ən s i, ˈ b uː j ən s i /), [1] [2] or upthrust is a net upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid.
For example, in retail commerce, the "net weight" of products actually refers to mass, and is expressed in mass units such as grams or ounces (see also Pound: Use in commerce). Conversely, the load index rating on automobile tires, which specifies the maximum structural load for a tire in kilograms, refers to weight; that is, the force due to ...
Based on his current apparent weight, he has a BMI of 26.9, making him officially overweight, according to the National Heart Lung and Blood Institute and the CDC calculations.
Everyone in North Korea is heartbroken over leader Kim Jong Un's apparent weight loss, said an unidentified resident of Pyongyang quoted on the country's tightly controlled state media, after ...
For optimal health, he recommends that males aim for 50% skeletal muscle mass relative to total body weight and females target 45% — although other factors, like age and fitness levels, come ...