Asap plspolice radar works to detect speeding cars by use of a. wave interference b. the doppler effect c. the formation of standing waves d. wave cancellation

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?

Pls pls pls pls ! describe, in your own words, how you found the epicenter of the earthquake.

It is really hard for me right know