Abrave child decides to grab onto an already spinning merry‑go‑round. the child is initially at rest and has a mass of 34.5 kg. the child grabs and clings to a bar that is 1.45 m from the center of the merry‑go‑round, causing the angular velocity of the merry‑go‑round to abruptly drop from 55.0 rpm to 17.0 rpm. what is the moment of inertia of the merry‑go‑round with respect to its central axis?

Explanation:

Here as we know that total angular momentum is always conserved for child + round system

so here by angular momentum conservation we have

here we have

(inertia of boy)

now we have

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

the doppler effect is used by weather forecasters to measure 

moving clouds