What will happen if an object or liquid with a density less than 1.0 g/cm3 is placed into water; do the same for an object or liquid with a density more than 1.0 g/cm3 ?

Determine the time it takes for a satellite to orbit the earth in a circular "near-earth" orbit. the definition of "near-earth" orbit is one which is at a height above the surface of the earth which is small compared to the radius of the earth, so that you may take the acceleration due to gravity as essentially the same as that on the surface. does your result depend on the mass of the satellite?