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If a 0.384 m radius hollow ball has a mass of 0.163 kg and a rotational kinetic energy of 0.2638 J, how fast is it spinning?

rpm

If a 0.408 m radius hollow ball has a mass of 1.174 kg and a rotational kinetic energy of 0.165 J, how fast is it spinning?

rpm

If a 0.329 m radius hollow ball has a mass of 1.555 kg and a rotational kinetic energy of 0.7493 J, how fast is it spinning?

rpm

If a 0.24 m radius hollow ball has a mass of 1.62 kg and a rotational kinetic energy of 0.2579 J, how fast is it spinning?

rpm

If a 0.537 m radius hollow ball has a mass of 1.324 kg and a rotational kinetic energy of 4.63 J, how fast is it spinning?

rpm

If a 0.544 m radius hollow ball has a mass of 1.663 kg and a rotational kinetic energy of 1.684 J, how fast is it spinning?

rpm