Which subatomic particle was discovered by researchers working with cathode ray tubes

Adiver in midair has an angular velocity of 6.0 rad/s and a moment of inertia of 1.2 kg·m2. he then pulls is arms and legs into a tuck position and his angular velocity increases to 12 rad/s. the net external torque acting on the diver is zero. what is his moment of inertia in the tuck position?

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?