In a resonance air column apparatus, the first and second resonance positions were observed at
18 cm and 56 cm respectively. The frequency of tuning fork
used was 480 Hz Calculate the velocity of sound in air and
end correction of the tube.

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?

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.