Two spherical nuclei have mass number 216 and 64 with their radii `R_(1) and R_(2)` respectively. The ratio, `(R_(1))/(R_(2))` is equal to

Two planets move around the sun. The periodic times and the mean radii of the orbits are T_(1), T_(2) and r_(1) r_(2) respectively. The ratio T_(1)//T_(2) is equal to

Two planets move around the sun. The periodic times and the mean radii of the orbits are T_(1), T_(2) and r_(1) r_(2) respectively. The ratio T_(1)//T_(2) is equal to

If the radii of nuclei of ._(13)Al^(27) and ._(30)Zn^(64) are R_(1) and R_(2) respectively, then (R_(1))/(R_(2))=

If the radii of nuclei of ._(13)Al^(27) and ._(30)Zn^(64) are R_(1) and R_(2) respectively, then (R_(1))/(R_(2))=

Two planets revolve round the sun with frequencies N_(1) and N_(2) revolutions per year. If their average orbital radii be R_(1) and R_(2) respectively, then R_(1)//R_(2) is equal to

Two planets revolve round the sun with frequencies N_(1) and N_(2) revolutions per year. If their average orbital radii be R_(1) and R_(2) respectively, then R_(1)//R_(2) is equal to

Two spherical black bodies of radii R_(1) and R_(2) and with surface temperature T_(1) and T_(2) respectively radiate the same power. R_(1)//R_(2) must be equal to

Two spherical black bodies of radii R_(1) and R_(2) and with surface temperature T_(1) and T_(2) respectively radiate the same power. R_(1)//R_(2) must be equal to

Two spherical black bodies of radii R_(1) and R_(2) and with surface temperature T_(1) and T_(2) respectively radiate the same power. R_(1)//R_(2) must be equal to