4. What would be the most likely outcome
if an event, such as nuclear war,
caused large amounts of dust and ash
to be put into the atmosphere?
A. The dust and ash would have
little effect on the climate.
B. The dust and ash would block
sunlight, triggering climate
change.
C. The dust and ash in the
atmosphere would trigger
volcanic eruptions.
D. A and B only.
E. A and C only.

B. The dust and ash would block  sunlight, triggering climate  change.

Explanation:

If such an event as a nuclear war should cause large amount of dust and ash in the atmosphere, this will trigger climate change.

Dust and ash can lead to severe consequences on the global climatic pattern.

The rising dust and ash will block out sunlight and electromagnetic radiation from reaching the earth surface. The earth will become abnormally cold as the source of the earth's heat is cut off. This will lead to freezing of water bodies and more cold-inclined world climate.

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

What even is this. where is the question