Abike and rider together have a mass of 60 kg. if the bike and rider have an acceleration of 2.0 m/s^2, what is the force on the bike and rider?

Remember, the density of water is 1g/cm3, so the mass of water equals the volume of the rose quartz. find the density of the rose quartz. find the specific gravity of the rose quartz. specific gravity = density of of water. what are the units for specific gravity?