To find the number of neutrons in an atom, you would subtract a. mass number from atomic number b. atomic number from mass number c. atomic number from electron number b. isotope number from atomic number

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?