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.
Use Back to return here. 1  The property of a magma that determines whether or not it has high viscosity: density. silica content. 2  Most stratovolcanoes tend to erupt: rhyolite. basalt. 3  This rock is so porous it often floats on water: gabbro. obsidian.  After steam, the most abundant component of volcanic gases: argon. carbon dioxide.