What is the difference between a quiescent and an explosive eruption?
What will be an ideal response?
Answer: Quiescent eruptions involve very fluid basaltic lavas. Explosive eruptions will occur when dissolved gases in magma expand, moving upward and carrying magma with them.
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Stress is _______
a) force per unit of area at a particular point b) change in volume c) mountain building process d) Response of rocks to plate tectonics e) deformation due to uplift
A certain carboxylic acid has a Ka of 5.1 x 10^-7. What is the ratio of the ratio of the deprotonated to the protonated form, respectively, at physiological pH of about 7.4? Assume the following general reaction. HA(aq) + H2O(l) ? H3O+(aq) + A-(aq)
A) 13 : 1 B) 1 :13 C) 100 : 1 D) 1 : 100
If a parcel of air is cooled and the amount of water vapor remained constant, its relative humidity would increase
Indicate whether the statement is true or false
Twilight is the name given to the time ____, when the sky remains illuminated and allows outdoor activities without artificial lighting
a. after sunset and immediately before sunrise b. after sunset and immediately after sunrise c. before sunset and immediately before sunrise d. before sunset and immediately after sunrise e. around sunset