In Times Square in New York City, people celebrate on New Year's Eve. Some just stand around, but many move about randomly. Consider a system consisting of all these people. Approximately, what is the total linear momentum of this system at any given instant? Justify your answer.

Zero

Explanation:

The linear momentum these people at any instant is approximately zero. Because momentum is a vector quantity  the random directions of their movement make their momentum in different directions and come back to their position which in ideal case makes it equal to zero.

think about the oscillation of the toy shown in the video. when the toy is at the highest point of its motion, its velocity is zero and its acceleration is negative.

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.