Gravitational force is between two object caused by energy in mass. Here when you are in a mine the radius of the earth in case of calculating gravity is reduced to the length between you and the center. This means the mass of earth is decreasing even though the distance is decreasing. Relative to the decrease in distance squared the decrease in the mass of the second object(earth) is more. As a result your weight(don't confuse with mass) decrease.
an elephant has less percent of body weight because it distributes the weight more evenly resulting in a smaller amount of body weight <^>
Spring balance shows remarkably less weight of yours, when immersed in the water. Your weight will be shown less as much the weight of water you have displaced.
Iodine represents less than 0.01 percent of body weight.
people gain weight when they eat less because your body thinks it is starving, your body converts your muscle into fat and it makes you feel weak and gain weight, however if you eat less for a long period of time you will lose weight
You lose body weight.
Eat less. Eat better.
Eat less and/or exercise more
Eat less and/or exercise more
It varies per individual. Almost always anorexics will have a noticeably less percent of body fat or weight from body fat that a "normal" or "average" weight person.
lean body mass
maybe.
The weight of a body is less on the Moon than on Earth because the Moon has less mass than Earth, causing weaker gravitational pull. Weight is a measure of the force of gravity acting on an object, so lower gravity on the Moon results in less weight for objects.