Healthy body mass is relative to how tall you are. The BMI system allows you to find a healthy weight relative to your height.
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Center of mass is defined as the point about which the sum of mass moment vectors of all the points of the body is equal to zero. Center of mass = [(mass of a point object)*(distance of that point from origin)]/(Total mass) For a rigid body we need to integrate this expression.
The answer will depend on the scales. Bathroom scales usually have divisions of 1 or 0.5 kilograms and a similar minimum for mass. Precision scales will have divisions and minimum mass of less than a milligrams.
Not enough information. To calculate mass, you would need volume and density (mass = volume x density).
You cannot calculate the volume of an object using only the density; you must also calculate the mass.You can calculate the mass by simply weighing the object.Density = Mass / VolumeTherefore Volume = Mass/Density.If you cannot be bothered to calculate the mass, simply measure the object. Multiply the length, times the width, times the height and you have the volume.
some scales, a newtonmeter maybe...