the derivative of 1x would be 1 the derivative of x to the power of 1 would be 1. the derivative of x+1 would be 1 the derivative of x-1 would be 1 im not sure what you are asâ¦king, but however you put it, it's 1. 2 people found this useful.
Subduction-zone stratovolcanoes, such as Mount St. Helens, Mount Etna, and Mount Pinatubo, typically erupt with explosive force: the magma is too stiff to allow easy escape of volcanic gases. As a consequence, the tremendous internal pressures of the trapped volcanic gases remain in the pasty magma.
Lava fountains occurred at SE crater, Mt Etna volcano on the night of 12-13 January 2011. The eruption consisted of a sustained lava fountain, lava flow, and an ash column reaching several kilometres high. The lava fountain lasted 42 minutes from 22:48-23:30 hr on 12th January and reached a height of 300-500 m.