A brave child decides to grab onto an already spinning merry‑go‑round. The child is initially at rest and has a mass of 24.5 kg.24.5 kg. The child grabs and clings to a bar that is 1.30 m1.30 m from the center of the merry‑go‑round, causing the angular velocity of the merry‑go‑round to abruptly drop from 53.0 rpm53.0 rpm to 19.0 rpm.19.0 rpm. What is the moment of inertia of the merry‑go‑round with respect to its central axis?

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?

The energy produced as a result of this flow of electrons from atom to atom is called

Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?