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Mercury's mass in scientific notation is 3.3010 x 1023 kg.
10 kg is greater than 6 kg. kg is the unit of mass. Hence feather has more mass than lead in this case.
On Earth, the gravitational constant, represented by 'g' is 10. To calculate the force in Newtons acting on an object, multiply the mass in kg by 'g'. That would mean said cat weighs 3.72 kg.
F = M x A F = 100 kg x 10 m/s2 F = 1000 N
You cannot calculate volume and density with only the mass. If the exact material forming the mass is known, then density can be looked up from a variety of sources and the volume can be calculated as mass divided by density. For example, given only the mass "10 kg" we have no way of knowing the volume or density. However, given "10 kg of gold" we can look up the density (19.3 grams per cubic centimeter) and divide 10,000 by 19.3 to get a volume of 518.13 cc.