Question

what is meant by volcano

Answer 1

volca A sector of circle of radius 15 centimetre has an angle of 120 degree. it is rolled up so that 2 bounding radii are joined together to form a cone. find the volume of a cone

Answer 2

Answer:

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A volcano is an opening in the earth’s crust through which lava, volcanic ash, and gases escape. Volcanic eruptions are partly driven by pressure from dissolved gas, much as escaping gases force the cork out of a bottle of champagne. Beneath a volcano, liquid magma containing dissolved gases rises through cracks in the Earth’s crust. As the magma rises, pressure decreases, allowing the gases to form bubbles. How the magma (lava) behaves when it reaches the surface depends on both its gas content and chemical composition.