Vector, in physics, a quantity that has both magnitude and direction. It is typically represented by an arrow whose direction is the same as that of the quantity and whose length is proportional to the quantityâs magnitude. Although a vector has magnitude and direction, it does not have position. That is, as long as its length is not changed, a vector is not altered if it is displaced parallel to itself. In contrast to vectors, ordinary quantities that have a magnitude but not a direction are called scalars. For example, displacement, velocity, and acceleration are vector quantities, while speed (the magnitude of velocity), time, and mass are scalars. To qualify as a vector, a quantity having magnitude and direction must also obey certain rules of combination.
Correct Answer: An explosive stratovolcano. Feedback: Good work Question 4 4 out of 4 points What are usually the most abundant gases emitted during basaltic volcanism (as measured during Hawaiian eruptions)? Selected Answer: Water and carbon dioxide Correct Answer: Water and carbon dioxide Feedback: Good work.
The gases associated with a volcanic eruption are initially dissolved in magma, which is hot molten rock found in the deeper layers of earth. During a volcanic eruption these gases are released into the atmosphere. The most abundant gas expelled during a volcanic eruption is water vapor.ther Volcanic Gases. There are other gases released during volcanic eruptions, but these gases are often emitted in trace amounts. They may include hydrogen sulfide and hydrochloric acid. If you ever found yourself inside a chemistry lab, you're familiar with these two chemical compounds.